nickel-coated-graphite
Nickel Coated Graphite
Manufacturer In China
silver powder manufacturer

Full Certifications Nickel coated graphite Factory

Kunshan Yosoar produces high-quality nickel-coated graphite, which not only maintains the main characteristics of the metal coating and coating particles, but also exhibits excellent comprehensive performance as a result to the interaction between the components under the composite action. It has applications in many fields such as aviation.

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Yosoar: Your Reliable Nickel coated graphite manufacturer in China

Kunshan Yosoar Company produces nickel-coated graphite with nickel-carbon content such as 60/40, 70/30, and various morphologies to choose from. Yosoar’s nickel-coated graphite also has a uniform and complete coating, a controllable coating thickness, and good cost performance. And has the advantages of high conductivity.

Such as 60/40 Nickel coated graphite: Oval and flake shapes, generally used for the preparation of sealing coating materials.

70/30 Nickel coated graphite: Low price,, Widely used in conductive silicone rubber.

75/25 Nickel coated graphite: Has good electrical conductivity and graphite lubricity

If you need nickel-coated graphite, you can definitely contact us in this regard, we will surely try our best in order to solve the problem for you in time.

We can also customize the nickel-coated graphite you need according to your application field and parameter requirement

Below are Nickel Coated Graphite FAQ guide:

How many models do you have?

Our models are as below, we can also customize according to your using field and demands.

Nickel Coated Graphite manufacturer Yosoar (9)

In our company Yosoar, we generally make use of the surface treatment process. This is done in order to coat a layer of high-purity nickel around the graphite powder and this done with a special shape, so that as a result to this, it will have a dual characteristic such as that of low density along with conductive shielding.

When we compare it with the conductive fillers along with some other conductive silica gels as well as some conductive rubbers, that may include carbon black, silver-plated materials and also pure silver, nickel-coated graphite powder, the they have some advantages that are as follows:

Nickel coated graphite powder shielding effectiveness: If we talk about the general effectiveness of the overall shielding, then the shielding of nickel-coated graphite powder is definitely much better than that of carbon black, but still, it is slightly inferior when compared to that of pure silver. When we refer to some of the published data, then we observe that when it comes to the case of a very fast frequency range, the overall shielding performance of nickel-coated graphite powder is equivalent to that of silver-plated materials.

corrosion: If we take a look at the protective shells of most of the conductive gaskets, then it is usually made of aluminum. Silver as well as some of the silver-plated materials can generate electrical coupling and because of this, they can accelerate the corrosion rate of most of the outdoor products. But despite it, many nickel and aluminum housings have good compatibility as well as electrical corrosion resistance. Apart from this, they also have good stability in harsh environments.

Nickel coated graphite powderCost-effective: If we refer to the price of nickel-coated graphite powder, then it is only 1/4 to 1/5 when compared to that of silver-plated materials, and indeed this is way cheaper than that of pure silver.

Nickel Coated Graphite manufacturer Yosoar (6)

What are the excellent characteristics of Nickel coated graphite powder?

Nickel coated graphite powder composite powder not only has the good electrical as well as good thermal conductivity of metallic nickel but also the good lubricity and wear resistance of graphite. It has a wide range of conductive fillers, abradable sealing coatings, electrical contact materials, and self-lubricating materials. Usage scenarios.

Why use electroless plating to prepare nickel-coated graphite?

The electroless plating method for preparing Nickel coated graphite powder has convenient operation, simple process, uniform and dense coating, strong even plating ability, and can be plated on particles of any shape, and can prepare uniform, fine, and dispersed composite powder.

Nickel Coated Graphite manufacturer Yosoar (3)

What are the phenomena in the process of preparing Nickel coated graphite powder by electroless plating?

The preparation process includes but is not limited to: increasing the reaction temperature and increasing the concentration of the main salt nickel sulfate can effectively increase the deposition rate, but if we consider the overall stability of this general plating solution will also decrease; at the concentration of medium and low complexing agents The plating layer shows a layered structure, and the plating layer has a columnar structure at a high concentration of the complexing agent.

How does the reaction proceed during the preparation of electroless plating?

The time for a nickel to grow on the graphite surface is mainly 90~120min during the electroless plating process, and the nickel is reduced and deposited in the area with the activation center, as the reaction progresses. The plating layer expands outwards, and finally, a complete nickel plating layer is formed, which is evenly coated on the graphite surface.

Nickel Coated Graphite manufacturer Yosoar (7)

Why is Nickel coated graphite powder widely used in the aviation industry?

As Nickel coated graphite powder is a commonly used abradable sealing coating material, it not only has a certain strength to resist the erosion of external particles and gas, but also can be scraped to prevent the blade tip from being worn during operation, and the sealing effect is good.

What are the common processes for preparing Nickel coated graphite powder and what are the characteristics?

At present, the main process for preparing Nickel coated graphite powder is hydrothermal hydrogen reduction. This process is a common hydrometallurgical process with the advantages of low cost, mature technology, and flexible production scale. However, due to the surface wettability of natural graphite, there is no autocatalytic center, as a result, it becomes more difficult to obtain a higher coating rate, and it is greatly affected by the raw materials.

What are the effects of mechanized treatment on the preparation of Nickel coated graphite powder?

Mechanical treatment means that the microscopic appearance of natural graphite changes from scaly to granular, and the sphericity of graphite is improved. Under the condition that other reaction conditions remain unchanged, the natural graphite is mechanized and the coating efficiency of metallic nickel is obtained. Improved, the coating uniformity has been significantly improved, the fluidity of the powder has also been improved, and the hardness and uniformity of the Nickel coated graphite powder coating have been improved.

What effect does the graphite surface modification process have on the properties of Nickel coated graphite powder powder?

The surface modification of graphite raw materials by heat treatment before the chemical coating can improve the coating effect of Nickel coated graphite powder powder. After the heat treatment process is 500℃ for 2h, the coating effect of Nickel coated graphite powder powder is the last, with the best physical properties; after adding alcohol surfactants to the chemical coating reaction solution, the surface activity of graphite can be greatly improved, and the surface activity of graphite can be significantly improved. The coverage rate of Nickel coated graphite powder powder.

Nickel Coated Graphite manufacturer Yosoar (10)

What are the characteristics of Nickel coated graphite powder?

Nickel coated graphite powder is a good solid lubricant with graphite as the core. The new two-component powder formed by coating nickel on the surface also has applications and uses in ow-temperature grinding and sealing lubricating material.

What are the application areas of Nickel coated graphite powder?

At present, it has wide applications in machinery, metallurgy, chemical industry, aviation industry, especially for abradable sealing parts and coatings of turbine engines. It can also be formed by pressing, sintering, decarburization, and cold rolling for a variety of gas and liquid The filter material is used in the medium.

What are the characteristics of Nickel coated graphite powder produced by hydrothermal pressurized hydrogen reduction?

The hydrothermal pressurized hydrogen reduction method is a simple, easy, economical, and reliable method. This method does not require activation treatment for graphite, but an activator must be added. To make the graphite core powder uniformly suspended in the solution, the smaller the powder, The stirring intensity should also be greater.

Nickel Coated Graphite manufacturer Yosoar (1)

Nickel coated graphite powder producers share the application and great advantages of conductive Nickel coated graphite powder.

The conductive Nickel coated graphite powder powder is prepared by generally covering the overall surface of the graphite powder with a high layer of nickel powder using the carbonyl nickel decomposition process. Now, there are two specifications of products containing 60% nickel and 75% nickel. 1. Application of conductive Nickel coated graphite powder include the mixing and combination of low-density graphite powder along with conductive nickel layer and this basically forms a lightweight filler, this filler is very suitable for the conductive gaskets (extrusion molding, mold molding, sheet, and on-site molding) andnis also used for the sealing ring. Apart from this, some other uses include plasma spraying, friction products, and carbon aluminum. 2. If we talk about the general advantages of conductive Nickel coated graphite powder, then there are many varieties of conductive fillers that can be used for silicone gaskets. Similarly, a conversion can be observed from carbon black, conductive Nickel coated graphite powder powder, silver-plated materials (Ag Al, Ag Ni, and Ag Glass) into pure silver. Also, conductive Nickel coated graphite powder has more advantages in the following three important aspects: Shielding effectiveness: Now referring to the general shielding performance of conductive Nickel coated graphite powder powder, then if we compare it to that of carbon black, then it is significantly better than carbon black, but despite the fact, it is slightly inferior to that of pure silver, but still comparable to silver-plated materials. If we consider the published data, then according to it, in a wide frequency range, referring to the general shielding effectiveness of conductive Nickel coated graphite powder powder, then it is equivalent to that of silver-plated materials. Electrochemical corrosion: Many enclosures that require conductive gaskets are aluminum products. Silver and its related fillers that are silver plated can also generate electrical coupling and apart from this, they can also accelerate the corrosion rate of outdoor products. Generally, the nickel and aluminum housings have good compatibility. Price: Now the main difference exists in the price categories as the price of conductive Nickel coated graphite powder powder is only 1/3 to 1/4 of that of silver-plated materials, and because of this, it much cheaper than pure silver. For related applications such as conductive Nickel coated graphite powder, graphite powder, shielding materials, etc., you can contact Yosoar, the supplier of Nickel coated graphite powder.

What is nickel-coated graphite and how do we prepare it?

Metallic Nickel coated graphite powder material is a type of composite particle material with a core-shell structure. It not only maintains the main characteristics of the metal coating and the coated particles but also exhibits the excellent properties that are generally produced as a result to the interaction of the components through the composite effect. Comprehensive performance, metallic Nickel coated graphite powder has applications in many fields such as metallurgy, machinery, aviation, etc. Among them, Ni/C microparticles are a type of nickel-coated powder material that has been used earlier, which combines the corrosion resistance and toughness of metallic nickel. It has many advantages such as good solid lubricity and low thermal expansion coefficient of graphite. It occupies an important position in metal Nickel coated graphite powder materials, and it is still widely concerned and used. At present, there are many methods for preparing Ni/C Granular materials, these may include the process of chemical vapor deposition, sol-gel, electroless plating, wet pressurized hydrogen reduction, etc. Among them, wet pressurized hydrogen reduction has simple equipment, economically feasible, and strong controllability of production scale and chemical composition. It is a preparation method that has realized the industrial-scale production of Nickel coated graphite powder particle materials. The uniformity of the metal Nickel coated graphite powder coating is a very important research content in the preparation of N/C composite materials by the wet pressurized hydrogen reduction method. Here refers to ” “Coating uniformity” is broad, including the distribution of the coating on the coated surface and the performance difference of the overall coating, and this includes factor such as the bonding strength of the coating to the coated surface, coating thickness, density (porosity), flatness, etc. The uniformity of the coating has also impacts on the overall performance of the core-shell structured composite particle material, which in turn affects the use effect of the material. Therefore, as a result it becomes necessary to study the uniformity of the NiC particle coating.

What are the factors that affect the quality of nickel-coated graphite?

The preparation of Ni by metal Nickel coated graphite powder wet pressurized hydrogen reduction method In the N /C process, the factors that affect the uniformity of the coating are complex and numerous. Related kinetic factors such as reaction temperature, raw material ratio, additives, etc., have many studies on the uniformity of the coating. The surface condition of the core particles and the influence of the number of coatings on the coating has also been reported. However, there have not been detailed and in-depth reports on the particle size dispersion of the core particles and the influence of the H2 mass transfer process on the coating effect of the nickel coating on the graphite surface. The particles themselves have a certain particle size dispersion. Generally, certain ratio of raw materials, core particles of different sizes participate in the coating at the same time, whereas the thickness of the coating will change. However, if we take into consideration the general regularity of the effect of the particle size dispersion of the core particles on the thickness of the coating is still unclear. Also, the influence of H2 mass transfer on the coating effect of coated granular materials is mostly concentrated on the stirring intensity and H2 partial pressure under the single-stirring method, and the H2 transfer under different stirring methods and intensities Little research has been conducted on the effect of different quality on the uniformity of the coating. Therefore, the in-depth study of the particle size dispersion of the core particles and the influence of H2 mass transfer on the plating effect of the nickel coating on the Nickel coated graphite powder surface is useful for further understanding of Ni/C composites. The coating process and mechanism are of great significance. For more information about Nickel coated graphite powder and related applications, please contact Yosoar, the supplier of Nickel coated graphite powder.

Can electrons be filled with Nickel coated graphite powder to achieve effective shielding?

Nickel coated graphite powder composite powder has both good conductivity of nickel and lubricity of graphite. It has broad application prospects in the fields of electrical contact materials, conductive fillers, and electromagnetic shielding materials. Compared with metallic nickel powder, the price of Nickel coated graphite powder composite powder is low, which is conducive to its wide application in conductive silicone rubber. The electroless plating process is used to prepare Nickel coated graphite powder composite powders with nickel mass fractions of 20%, 40%, and 60% respectively. The three composite powders are used as conductive fillers to prepare conductive silicone rubber, and they are respectively combined with graphite and nickel as conductive fillers. The results of conductive silicone rubber were compared, and the effect of the type and content of conductive fillers on the conductive and mechanical properties of conductive silicone rubber were studied. And the overall results depicted that the addition of conductive fillers can effectively improve the conductive properties of silicone rubber.

What are the roles of graphite and nickel in nickel-plated graphite?

As a solid self-lubricating medium, graphite is added to the metal matrix to form a self-lubricating coating, which can transfer between the grinding surfaces to form a lubricating film. It has good anti-friction performance and makes the friction, as well as the wear performance of the graphite self-lubricating coating obvious, improve. Coating graphite with nickel can reduce the oxidation of graphite during the process of cladding and retain more antifriction medium.

Nickel Coated Graphite manufacturer Yosoar (4)

What are the advantages of using laser cladding technology to process nickel-coated graphite?

The coating produced by using the laser cladding technology to generate a metal composite ceramic coating method has good wetting with the substrate and strong bonding force. Uniform density, clean and pollution-free, can achieve high toughness and high wear resistance of the overall material, thereby improving the overall performance and service life of the material.

What are the effects of Nickel coated graphite powder on the microstructure and mechanical properties of graphite composites?

Electroless nickel plating on the graphite surface, the prepared nickel-coated graphite composite powder can form a uniform nickel plating layer on the graphite surface. When the nickel content is 20%, the nickel coating is dense and completely envelops the graphite particles. Graphite composite materials without nickel coating have uneven distribution of graphite particles, and the interface is not tightly bonded, and there are obvious gaps at the interface; in composite materials coated with nickel coating, electroless nickel plating on the graphite surface significantly improves the graphite matrix The wettability makes the interface more tightly bonded. The nickel layer is mainly composed of Ni phase and Ni3p phase, and the interface between graphite and copper is transformed into a Cu/(Ni+Ni3P) interface. There are defects such as voids and cracks and all of this takes place at the interface of the graphite composite material without nickel coating, resulting in the performance of the composite material is not ideal; the interface of the graphite composite material containing nickel coating is tightly bonded, and the nickel element can solid-solution strengthen the copper matrix, so that the performance of the composite material is not ideal. The density, Brinell hardness and compressive strength of the material gradually increase with the increase of nickel content, and a graphite composite material with uniform graphite particle distribution and high performance is obtained.

What is the microwave performance of Nickel coated graphite powder?

Generally, the electroless method of plating is used to coat a layer of nickel particles on the overall surface of the graphene. Observing the deposition of electroless nickel, and it has been observed that the deposition of nickel particles is uniform and the particle size is uniform and small. According to the magnetic properties of electroless nickel plating graphene, it is concluded that it is Soft magnetic material, suitable for electromagnetic interference materials. Electromagnetic parameter tests have been carried out on unnickel-plated graphene materials and graphite electroless nickel-plated graphene. The results show that the maximum value of microwave absorption of unnickel-plated graphene can only reach −6.5 dB, the microwave attenuation effect is not good; while in the microwave absorption curve of nickel-plated graphene with different thicknesses, the absorption of −10dB is achieved in the frequency bandwidth of 5GHz, of which the maximum is −16.5dB at about 12GHz. The results show , Compared with the microwave absorption performance of nickel-plated graphene, the attenuation performance of nickel-plated graphene is greatly improved.

Nickel Coated Graphite manufacturer Yosoar (5)

Why do pretreatment before using plasma-sprayed nickel-clad graphite coating?

The bonding strength of the coating as well as the substrate directly affects the performance of the coating, so surface purification and sandblasting must be carried out.

What is the main content of pretreatment before spraying Nickel coated graphite powder coating?

Surface purification: mainly to remove oxides, oil stains, rust, and other impurities on the substrate surface. First use sandpaper to polish the surface of the substrate to remove the oxide film on the general substrate surface, then use acetone to clean in an ultrasonic cleaner to remove oil and impurities on the surface, and finally air dry.

Sandblasting: Sandblasting can greatly increase the roughness of the surface of the substrate so that the coating and the substrate can be tightly occluded to improve the bonding strength of the coating and the substrate.

What is the lubrication mechanism of nickel-coated graphite?

As the friction progresses, graphite continues to leak to the coating surface. Under the action of shear stress and compressive stress, it spreads on the coating surface, and finally, a relatively complete graphite moistening film is gradually formed to achieve the effect of lubricating and reducing wear.

Nickel Coated Graphite manufacturer Yosoar (8)

What are the characteristics of nickel-coated graphite core-shell composite particles?

It has both the excellent properties of graphite and nickel. It can not only improve the conductivity of graphite, but also impart certain magnetic properties to the composite particles, and regulate the morphology and size of the nickel shell in the nickel-coated graphite composite particles. It is hoped to solve the agglomeration problem of nano-nickel powder and improve its catalytic activity.

What are the functions of nickel-coated graphite coating and the performance characteristics of graphite in it?

Nickel-coated graphite powder has a lamellar crystal structure, low shear resistance, and easy to transfer. When it is added as a solid self-lubricating medium to the metal matrix to form a self-lubricating coating, it can transfer between the grinding surfaces to form a lubricating film, showing Good anti-friction performance, so that the overall friction along with the wear performance of the graphite self-lubricating coating has been significantly improved. Coating graphite with nickel can reduce the oxidation of graphite during the welding process and retain more anti-friction medium. The laser cladding technology is also used to generate a metal composite ceramic coating method produces a coating that has good wetting with the substrate, strong bonding force, uniform density, clean and pollution-free, and can achieve high toughness and high wear resistance of the overall material, thereby improving The overall performance and service life of the material.

Nickel Coated Graphite manufacturer Yosoar (2)

In the process of preparing nickel-coated graphite, what is the role of the introduction of the transition layer?

The introduction of the transition layer makes the surface of the nickel-coated graphite self-lubricating coating smooth, the coating and the substrate are well combined, there is no pore inclusion phenomenon, the graphite is retained in the coating more, and the anti-friction effect is significant; similarly, at that moment, the addition of graphite makes the coating formed M3C strengthening phase, the hardness has been increased。

What are the effects of different loads on the nickel-coated graphite self-lubricating coating?

When the load is 10N, it is mainly due to adhesive wear. When the load is 30N, microcracks appear accompanied by oxidative wear, which aggravates the propagation of microcracks. When the load is 50N, the oxide breaks and forms a brittle fracture zone, and the coating peels off in a large area.

What are the influencing factors of the Ni deposition process on the surface of graphite particles when the wet pressurized hydrogen reduction method is used to prepare spherical Ni/C particles?

When the general size of particles of the spherical graphite particles increases from about 30μm to about 60μm, the thickness of the corresponding nickel coating increases from about 4.5μm to about 6.0μm, that is, the thickness of the coating increases with the increase of the core particle size. Therefore, if other conditions are certain, reducing the particle size dispersion of the core particles can reduce the difference in the coating thickness of the coated particles and improve the uniformity of the coating. The coating reaction rate of single and double impeller stirring remains the same, but the Ni/C particle coating obtained by double impeller stirring is more complete and dense, which is an ideal coating state.

 

 

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