HFCVD nanocrystalline diamond coatings for tribo-applications in the presence of water

abstract

Nanocrystalline diamond (NCD) is increasingly popular as engineered surface coatings intended for tribo-mechanical applications. Sliding may occur in the presence of water, or aqueous solutions, for example in mechanical face seals, MEMS, or in preliminary testing bearing surfaces for biotribological applications. NCD coatings of 20 pm thickness were grown by the hot-filament chemical vapour deposition (HFCVD) method on Si(3)N(4) ceramic substrates. The water lubricated NCD/NCD tribosystem was studied in an oscillating bail-on-flat tribometer. For all loading conditions up to the threshold load prior to film delamination (85 N), very low friction coefficient values (mu similar to 0.02 to 0.05) combined with a high wear resistance (10(-9) to 10(-8) mm(3)N(-1)m(-1))were observed. (C) 2008 Elsevier B.V. All rights reserved.

keywords

COATED SILICON-NITRIDE; CVD DIAMOND; PERFORMANCE; FRICTION; TRIBOSYSTEMS; COMPOSITES; BEHAVIOR; LOAD

subject category

Materials Science

authors

Abreu, CS; Amaral, M; Oliveira, FJ; Gomes, JR; Silva, RF

our authors

Share this project:

Related Publications

We use cookies for marketing activities and to offer you a better experience. By clicking “Accept Cookies” you agree with our cookie policy. Read about how we use cookies by clicking "Privacy and Cookie Policy".