Production of conversion oxide-ceramic coatings on zirconium and titanium alloys |
| |
Authors: | M D Klapkiv N Yu Povstyana H M Nykyforchyn |
| |
Affiliation: | (1) Karpenko Physicomechanical Institute, Ukrainian Academy of Sciences, Lviv;(2) Luts’k State Technical University, Luts’k |
| |
Abstract: | We consider the possibilities of surface hardening of zirconium and titanium alloys with conversion oxide-ceramic coatings.
These coatings have been produced by the method of plasma-electrolytic treatment in alkaline solutions. We have established
that the plasma temperature in discharge spark channels reaches (6–9) · 103 K. The thickness of the coatings is 100 to 120 and 30 to 40 μm, and their microhardness is ∼ 800 and ∼ 1000 MPa for zirconium
and titanium alloys, respectively. The functional properties of the coatings depend on the synthesis conditions, including
the electrolyte composition, the cathode and anode current densities, and also the treatment time. We have evaluated the thickness,
microhardness, and wear resistance of the coatings under conditions of dry friction and cavitation as well as their fatigue
strength and corrosion resistance. We have established that this treatment provides a high wear and corrosion resistance of
the alloys under study with insignificant decrease in their fatigue strength.
__________
Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 42, No. 2, pp. 117–124, March–April, 2006. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|