Fabrication and thermal stability of Ni-P coated diamond powder using electroless plating

Abstract

Ni-P coated diamond powder was fabricated successfully by using electroless plating. Effects of active solutions, plating time, reaction temperature, and the components of the plating bath on the Ni-P coating were investigated systematically. Moreover, a study on the thermal stability of Ni-P coated diamond under various atmospheres was performed. The results indicate that Pd atoms absorbed on the diamond surface as active sites can consequently enhance the deposition rate of Ni effectively. The optimized plating bath and reaction conditions improve both the plating speed and the coverage rate of Ni-P electroless plating on the diamond surface. Compared to the diamond substrate, the diamond coated with Ni-P films exhibits very high thermal stability and can be processed up to 900°C in air and 1300°C in protective atmosphere such as H₂.

Keywords

synthetic diamonds / electroless plating / thermal stability / particulates

References

[1] Sheela G., Pushpavanam M. Diamond-dispersed electroless nickel coatings. Met. Finish., 2002, 100(1): 45.

[2] Bridgman P.W. Synthetic diamonds. Sci. Am., 1955, 193(5): 42.

[3] Young T.F. Fabrication and thermal analysis of a copper/diamond/copper thermal spreading device. Surf. Coat. Technol., 2007, 202(4–7): 1208.

[4] Slack G.A. Nonmetallic crystals with high thermal conductivity. J. Phys. Chem. Solids, 1973, 34(2): 321.

[5] Battabyal M., Beffort O., Kleiner S., et al. Heat transport across the metal-diamond interface. Diamond Relat. Mater., 2008, 17(7–10): 1438.

[6] Beffort O., Khalid F.A., Weber L., et al. Interface formation in infiltrated Al(Si)/diamond composites. Diamond Relat. Mater., 2006, 15(9): 1250.

[7] Chu K., Jia C.C., Liang X.B., et al. Effect of particle size on the microstructure and thermal conductivity of Al/diamond composites prepared by spark plasma sintering. Rare Met., 2009, 28(6): 646.

[8] Mao A.Q. Oxidation resistance of Ni-P electroless plating on diamonds. Chin. J. Rare Met., 2008, 32(3): 311.

[9] Simakin A.V., Loubnin E.N., Shafeev G.A., et al. Laser assisted deposition of Pd-doped diamond-like films from liquid hydrocarbons and their use for glass metallization. Appl. Surf. Sci., 2002, 186(1–4): 227.

[10] Pimenov S.M., Shafeev G.A., Konov V.I., et al. Electroless metallization of diamond films. Diamond Relat. Mater., 1996, 5(10): 1042.

[11] Baudrand D., Bengston J. Electroless plating processes. Developing technologies for electroless nickel, palladium, and gold. Met. Finish., 1995, 93(9): 55.

[12] Zhang B.W., Xie H.W. Effect of alloying elements on the amorphous formation and corrosion resistance of electroless Ni-P based alloys. Mater. Sci. Eng. A, 2000, 281(1–2): 286.

[13] Tsai Y.Y., Wu F.B., Chen Y.I., et al. Thermal stability and mechanical properties of Ni-W-P electroless deposits. Surf. Coat. Technol., 2001, 146–147, 502.

[14] Winowlin Jappes J.T., Ramamoorthy B., Kesavan Nair P. Novel approaches on the study of wear performance of electroless Ni-P/diamond composite deposites. J. Mater. Process. Technol., 2009, 209(2): 1004.

[15] Ahn J.G., Kim D.J., Lee J.R., et al. Improving the adhesion of electroless-nickel coating layer on diamond powder. Surf. Coat. Technol., 2006, 201(6): 3793.

[16] Lamer V.K., Dinegar R.H. Theory, production and mechanism of formation of monodispersed hydrosols. J. Am. Chem. Soc., 1950, 72(11): 4847.

[17] Massalski T.B. Binary Alloy Phase Diagrams, 1996 2nd ed. New York, ASM International