Please use this identifier to cite or link to this item:

TitleEffect of relative humidity and temperature on the tribology of multilayer micro/nanocrystalline CVD diamond coatings
Author(s)Shabani, M.
Abreu, C. S.
Gomes, J. R.
Silva, R. F.
Oliveira, F. J.
KeywordsNanocrystalline diamond
Hot filament CVD
Issue date2017
JournalDiamond and Related Materials
Abstract(s)The tribological behavior of tenfold micro/nanocrystalline CVD diamond multilayers is here investigated in self–mated configuration using ball-on-plate reciprocating wear testing. The effects of relative humidity (RH) and temperature (T) on friction and wear coefficients are assessed. The strongest effect of humidity was found on the value of the critical load (no delamination) that triples from 40 N at 10%RH to 120 N at 90%RH. Evaluation of the wear coefficients of the plates was only possible with the use of 3D optical profilometry. A valley-shaped evolution is observed for the wear coefficient of the plates, within the 10% to 90% RH range, with a minimum of about 1.7x10-7 mm3N-1.m-1, indicative of a mild wear regime, whereas the balls have lower values in the very mildwear regime of k ~ 10-8mm3N-1.m-1. The clearest difference between the RH and temperature experiments is observed for the critical loads, limited to the range 40-55 N at 50-100°C, while at room temperature a value of 120 N was reached. However, the critical loads at high temperature are similar to those attained under dry conditions (≤25% RH) highlighting the absence of water as the load bearing medium.
AccessRestricted access (UMinho)
Appears in Collections:DEM - Artigos em revistas de circulação internacional com arbitragem científica

Files in This Item:
File Description SizeFormat 
Shabani et al_Diam and Rel Mat 2017.pdf
  Restricted access
2,25 MBAdobe PDFView/Open

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID