Preparation and characterization of Cr/CrC multilayer on gamma-TiAl alloy by the double glow plasma surface alloying technology

Affiliation of Author(s):材料科学与技术学院

Journal:MATERIALS LETTERS

Key Words:Cr/CrC multilayer Double glow plasma surface alloying technology Wear Oxidation resistance Metallurgy

Abstract:Hard ceramic and ductile metal materials combined in multilayered structures provide superior wear and oxidation resistance to the single layer, which has been applied extensively to components subjected to high-temperature oxidation and wear. In this paper, the oxidation and wear properties of Cr/CrC multilayer coating obtained on c-TiAl alloy by an emerging technology, that is double glow plasma surface alloying technology, were reported. Sliding wear and oxidation tests were performed on Cr/CrC multilayer as well as on chromising reference coating. The friction coefficients of Cr/CrC multilayer at room and high temperature were 0.2 and 0.175 respectively, about only 22.2% and 35% of the c-TiAl substrate. The Cr/CrC multilayer oxidized approximately parabolically, with lower oxidation rate than the chromising coating. The oxidation mechanism of the Cr/CrC multilayer was mainly dominated by carbide oxidation and dense Cr2O3 scale oxide development. (C) 2017 Elsevier B.V. All rights reserved.

ISSN No.:0167-577X

Translation or Not:no

Date of Publication:2018-03-15

Co-author:陈小虎,Wei Dongbo,丁丰,李逢昆,魏祥飞,马士剑

Correspondence Author:Zhang Pingze

Date of Publication:2018-03-15