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A kind of method of diamond surface nickel plating

A diamond and diamond micropowder technology, applied in liquid chemical plating, metal material coating process, coating and other directions, can solve the problems of high cost, difficult to stabilize process quality, complicated sensitization and activation processes, etc. The effect of reduction, process simplification and stable process quality

Active Publication Date: 2018-08-24
株洲岱勒新材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, palladium chloride containing precious metal palladium is used in the activation process of the prior art, which makes the cost of nickel plating on the diamond surface high; Process quality is difficult to stabilize

Method used

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  • A kind of method of diamond surface nickel plating
  • A kind of method of diamond surface nickel plating
  • A kind of method of diamond surface nickel plating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1) Soak the diamond micropowder of W40-50 in the degreasing solution to remove the grease and dirt on the diamond surface; wherein, the degreasing solution includes: 10g / L NaOH, 20g / L NaOH 2 CO 3 , 30g / L Na 3 PO 4 12H 2 0, 10g / L sodium silicate and 2g / L emulsifier (sodium lauryl sulfonate); the temperature of the immersion is 20 ℃, and the time is 10min to obtain the diamond after degreasing;

[0043] The degreased diamond is washed with water until the pH value is 6-8 neutral.

[0044] 2) Soak the washed diamond in the activation solution, the activation solution is mainly composed of NiSO 4 50g / L, sodium citrate 100g / L and hydrazine hydrate 50mL / L; the diamond is soaked in the activation solution for 15 minutes, vacuum filtered, and then placed in a vacuum heat treatment furnace for vacuum sintering to obtain activated diamond; , the vacuum pressure of vacuum sintering is -0.06MPa, the temperature is 100°C, and the temperature is kept for 3h.

[0045] The activa...

Embodiment 2

[0049] 1) Soak W30-40 diamond micropowder in a degreasing solution to remove grease and dirt on the diamond surface; wherein, the degreasing solution includes: 10g / L NaOH, 20g / L NaOH 2 CO 3 , 30g / L Na 3 PO 4 12H 2 0, 10g / L sodium silicate and 2g / L emulsifier (sodium lauryl sulfonate); the temperature of the immersion is 30 ℃, and the time is 10min to obtain the diamond after degreasing;

[0050] The degreased diamond is washed with water until the pH value is 6-8 neutral.

[0051] 2) Soak the washed diamond in the activation solution, the activation solution is mainly composed of NiSO 4 100g / L, sodium citrate 200g / L and hydrazine hydrate 100mL / L; the diamond is soaked in the activation solution for 15 minutes, vacuum filtered, and then placed in a vacuum heat treatment furnace for vacuum sintering to obtain activated diamond; , the vacuum pressure of vacuum sintering is -0.08MPa, the temperature is 150°C, and the heat preservation time is 6h.

[0052] The activated diamo...

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Abstract

The invention provides a method for plating the surface of diamond with nickel. The method includes the following steps of firstly, sequentially conducting oil removal and water washing on diamond to obtain washed diamond; secondly, conducting vacuum sintering after the diamond washed in the first step makes contact with activating liquid to obtain activated diamond, wherein the activating liquid includes water-soluble nickel salt, reducing agent and complexing agent; thirdly, conducting chemical nickel plating on the diamond activated in the second step. The activating liquid including water-soluble nickel salt, reducing agent and complexing agent is adopted, and nickel salt is reduced into metal nickel and sintered on the surface of the diamond through a vacuum sintering mode. Through the catalytic activity of nickel, the original sensitizing procedure and the original activating procedure are combined into one activating procedure, the process is simplified, cost is reduced, the process quality of whole nickel plating can be stable, and the method is suitable for industrial expanded production.

Description

technical field [0001] The invention relates to the technical field of diamond processing, in particular to a method for nickel-plating a diamond surface. Background technique [0002] As a superabrasive, synthetic diamond is widely used in grinding, cutting and high-precision machining due to its unique properties such as high hardness and high wear resistance. When diamond superabrasives are used as cutting, grinding, polishing, and dressing tools, due to their small particles, it is necessary to rely on metal or resin as a matrix to consolidate diamond particles together to form diamond tools, thereby realizing the processing of workpieces. However, diamond and most metals have high interface energy, which makes the bonding force between diamond and the matrix poor, and it is easy to cause diamond to fall off early, thus greatly reducing the processing efficiency and service life of the abrasive tool. Nickel plating on the diamond surface can solve these problems. Nickel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/18C23C18/34
CPCC23C18/1851C23C18/34
Inventor 刘纯辉
Owner 株洲岱勒新材料有限责任公司
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