| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 592175 | Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2015 | 6 Pages |
•A new method to prepare diamond containing coating is presented.•The material is dipped in CuSO4 and diamond particles are sprayed on the surface.•Phosphine is used to convert CuSO4 into copper phosphide.•The diamonds are finally enclosed in a copper matrix through electroplating.
The formation of a diamonds containing coating on the surface of tools is a way of increasing hardness and wearability of the working surfaces. We have developed a new process to prepare these composite coating.The surface is initially wetted with copper sulphate solution and then diamonds powder is sprayed onto the surface. Upon subsequent exposure to gaseous phosphine, a surface layer of solid copper phosphide, firmly holding the diamond particles, is formed. Copper phosphide has sufficient electrical conductivity, allowing conventional metal electro-plating. The effect of process parameters such as duration of the exposure to phosphine gas, concentration of the CuSO4 solution and thickness of the electro-deposited copper layer have been investigated and the surface roughness of the prepared samples increased about 50 BHN (Brinell hardness number).
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