Low friction and wear resistant coating systems on Ti6Al4V alloy

• Autorzy: Wendler, B. G. , Pawlak, W.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Development of an original multiplex hybrid treatment of Ti6Al4V alloy: diffusion hardening+intermediate hard gradient TiCxNy layer with use of continuous CAE+top low friction and wear resistant hard amorphous a-C layer with use of pulsed CAE method. Design/methodology/approach: Ti6Al4V substrates were diffusion hardened with interstitial O or N atoms with use of glow discharge plasma in the atmosphere Ar+O2 or Ar+N2. Next they were deposited with a hard gradient TiCxNy layer and with a hard amorphous a-C coating as the top one. The morphology, microstructure, chemical and phase composition, chemical bonds, microhardness and tribological properties during dry friction of the alloy after multiplex treatment have been investigated with use of SEM, EDS, XRD, XPS, Vickers diamond indenter and ball-on-plate test. Findings: An important increase of hardness of the near surface zone of the Ti6Al4V alloy has been achieved (from ∼ 350VHN to ∼ 1000 VHN), good adhesion between the gradient TiCxNy coating and the Ti6Al4V substrate as well as an important decrease of dry friction coefficient (down to ∼ 0.15) and a substantial increase of the resistance to wear (up to two orders of magnitude in comparison with non treated Ti alloy). Research limitations/implications: The research will be continued on greater number of specimens and against other counterbodies. Practical implications: It looks like that the Ti alloys can be used as mobile parts of machines due to high resistance to wear and low friction. Originality/value: A novel original multiplex hybrid treatment of Ti alloys has been developed at the Lodz University of Technology.

Słowa kluczowe

PL

obróbka powierzchniowa; obróbka duplex; powłoki gradientowe; cienkie i grube powłoki

EN

surface treatment; glow discharge treatment; duplex treatment; thick and thin coatings; gradient coatings; a-C:H(Ti) coating; a-C coating; dry sliding friction; ball-on-plate test

• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2008
• Tom: Vol. 26, nr 2
• Strony: 207-210
• Opis fizyczny: Bibliogr. 15 poz., il., tab., wykr.

Twórcy

autor

Wendler, B. G.

autor

Pawlak, W.

• Institute of Materials Engineering, Department of Coatings Engineering, Łódź University of Technology, ul. Stefanowskiego 1, 90-924 Łódz, Poland,

Bibliografia

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