Wear Rate of Nanocrystalline Diamond Coating under High Temperature Sliding Conditions

Abstract:

The present study deals with the tribological behavior of nanocrystalline diamond (NCD) coatings at high temperature sliding conditions. The NCD coatings were grown by plasma enhanced chemical vapor deposition (PECVD) method on the hard metal (WC-Co) substrates. The friction and wear tests were performed on ball-on-disc tribometer using a high-temperature chamber with rotary drive. The tests were carried out at room temperature, 300, 450 and 600 °C. The scanning electron microscopy (SEM), optical microscopy, mechanical profilometry and Raman spectrometry were used for investigation of the morphology and chemical composition of the wear scars and pristine surface. The depth and width of the wear scars measured after the high temperature sliding tests are larger in comparison with room temperature tests. It was observed that the coefficient of friction (COF) increased with increasing temperature. The wear rate of NCD coatings tested at 300-450° C was about 10 times higher than that at room temperature. The mechanisms involved for these variations are discussed.

• Periodical: Solid State Phenomena (Volume 267)
• Pages: 219-223
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.267.219
• Online since: October 2017
• Authors: Maxim Yashin*, Janis Baroninš, Pradeep L. Menezes, Mart Viljus, Taavi Raadik, Andrei Bogatov, Maksim Antonov, Vitali Podgursky
• Keywords: High Temperature, NCD, Tribology, Wear Rate

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