Tribology of Ge Thin Films on Stainless Steel.

0474284 - ÚCHP 2018 RIV GB eng J - Journal Article
Krabáč, Lubomír - Pejaković, V. - Dřínek, Vladislav - Dörr, N. - Badisch, E.
Tribology of Ge Thin Films on Stainless Steel.
Industrial Lubrication and Tribology. Roč. 69, č. 2 (2017), s. 182-189. ISSN 0036-8792. E-ISSN 1758-5775
R&D Projects: GA ČR GC15-08842J
Institutional support: RVO:67985858
Keywords : germanium * thin films * nanovires
OECD category: Physical chemistry
Impact factor: 0.763, year: 2017

Ge thin films with an average thickness of about 3 microns were prepared by low pressure CVD of hexamethyldigermane precursor on Cr-Ni stainless steel substrates. For the first time, the tribological interaction between Ge thin film and steel surface was investigated. Wear and friction experiments were conducted with a 100Cr6 steel ball sliding against the flat Ge thin-film-coated stainless steel sheets (ball-on-flat microtribometer, no lubricant, normal loads of 50-100 mN, initial Hertzian contact pressures of 385-485 MPa, total sliding distance up to 200 mm, room temperature). SEM results revealed that prepared Ge thin films were composed of curved nanowires and cone-shaped nano-/microdroplets. Regarding friction and wear characteristics, the substrates coated with Ge thin films did not affect the coefficient of friction significantly by load. The wear of the base material (Cr-Ni stainless steel) was not observed under the mentioned experimental conditions.
Permanent Link: http://hdl.handle.net/11104/0272364