Ultradisperse Diamond Modifications in the Composite Gilding Process
Composite electrochemical coatings (CEC) deposited from three basic gilding solutions after addition of 0.1–10 g/l of three UDD modifications were studied. The UDD content of in the CEC was varied in the range of 0.2–0.8% depending on the electrolyte composition, the UDD concentration and modification. Microhardness of the CEC is found to increase by 50–70% due to UDD and the microhardness dependence on the UDD concentration may be monotonic or sharp, depending on the modification used. We suggest an effective electrolyte composition with less than 3 g/l of the best UDD modification. Composite electrolyte is characterized by high stability in exploitation, high colloid stability of UDD zol, and good physical, mechanical, protective, and decorative properties of CEC. The coating has a microhardness of 1.5–1.8 GPa, a relative wear resistance of 1.5–2.3, as compared to samples containing no diamond. An average thickness of the continuous layer (on polished substrate or a glance Ni interlayer) is 0.15–0.2 µm.
Keywordsultradispersed diamond surface modifications composite electroplating gold-diamond co-deposition electrochemical coating
Unable to display preview. Download preview PDF.
- 1.Yu.V. Timoshkov, T.M. Gubarevich, and I.S. Molchan. Microstructure and wear behaviour of Ni-composite coatings with different types of ultra-dispersed diamond particles. Surface Modification Technologies, No. 11, 7–13 (1998).Google Scholar
- 2.J.V. Timoshkov, T.M. Gubarevich, T.I. Orehovskaja et.al. Properties of compose nickel coatings with various types of ultradisperse diamond particles. Galvanotechnics and Processing of a Surface 7(1), 20–26 (1999).Google Scholar
- 3.F. Wünsche, A. Bund, and W. Plieth. Investigations on the electrochemical preparation of gold-nanoparticle coatings. J. of Solid State Electrochemistry 8(3), 209–13 (2004).∼Google Scholar
- 4.A.D. Toropov, P.J. Detkov, and S.I. Chuhaeva. Reception and properties of compose nickel coatings with ultradisperse diamonds. Galvanotechnics and processing of a surface. 7(1), 14–19 (1999).Google Scholar
- 5.T.M. Gubarevich, Z.A. Gotto, and L.E. Chernukho. New modifications of nanodiamonds for compose materials and coatings with given properties. Abstracts of the International symposium “Detonation nanodiamonds: synthesis, properties and application” 2003 July 7–9, St.-Petersburg, p. 84 (2003).Google Scholar