Comparative analysis of thermal stability of two different nc-TiC/a-C:H coatings

0445134 - ÚFM 2016 RIV CH eng J - Journal Article
Zábranský, L. - Buršíková, V. - Daniel, L. - Souček, P. - Vašina, P. - Dugáček, J. - Sťahel, P. - Caha, O. - Buršík, Jiří - Peřina, Vratislav
Comparative analysis of thermal stability of two different nc-TiC/a-C:H coatings.
Surface and Coatings Technology. Roč. 267, APR (2015), s. 32-39. ISSN 0257-8972
R&D Projects: GA MŠMT(CZ) LM2011019
Institutional support: RVO:68081723 ; RVO:61389005
Keywords : nanocomposite * thermal annealing * hardness
Subject RIV: BM - Solid Matter Physics ; Magnetism; BG - Nuclear, Atomic and Molecular Physics, Colliders (UJF-V)
Impact factor: 2.139, year: 2015

The aim of this work is to compare the thermal stability of two nanocrystalline TiC/a-C:H coatings prepared by magnetron sputtering of titanium target in acetylene containing environment. The coatings exhibited different chemical composition ([Ti]/[C] ratio) and structure. Their thermal stability was studied using thermal desorption spectroscopy in the temperature range from 500 to 1000 °C. The hardness and elastic modulus of both coatings remained almost unchanged up to 700 °C, however, they substantially differed from the point of view of their fracture resistance. Up to 700 °C no indentation induced cracking occurred in the titanium rich coating, however, reaching the annealing temperature of 1000 °C, this coating became porous and spontaneous tensile cracking appeared on its surface.
Permanent Link: http://hdl.handle.net/11104/0249266