Tribological Behavior of Plasma-Sprayed Al2O3-20 wt.%TiO2 Coating

Affiliation of Author(s):材料科学与技术学院

Journal:JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE

Key Words:Al2O3-20 wt.% TiO2 coating inter-lamellar structure modeling plasma-sprayed tribological behavior

Abstract:Al2O3-20 wt.% TiO2 ceramic coatings were deposited on the surface of Grade D steel by plasma spraying of commercially available powders. The phases and the microstructures of the coatings were investigated by x-ray diffraction and scanning electron microscopy, respectively. The Al2O3-20 wt.% TiO2 composite coating exhibited a typical inter-lamellar structure consisting of the gamma-Al2O3 and the Al2TiO5 phases. The dry sliding wear behavior of the coating was examined at 20 A degrees C using a ball-on-disk wear tester. The plasma-sprayed coating showed a low wear rate (similar to 4.5 x 10(-6) mm(3) N-1 m(-1)), which was < 2% of that of the matrix (similar to 283.3 x 10(-6) mm(3) N-1 m(-1)), under a load of 15 N. In addition, the tribological behavior of the plasma-sprayed coating was analyzed by examining the microstructure after the wear tests. It was found that delamination of the Al2TiO5 phase was the main cause of the wear during the sliding wear tests. A suitable model was used to simulate the wear mechanism of the coating.

ISSN No.:1059-9495

Translation or Not:no

Date of Publication:2017-05-01

Co-author:Cui, Shiyu,Miao, Qiang,Zhang, Zhigang,Yizhong Xu,Ren, Beilei

Correspondence Author:Cui, Shiyu,lwp

Date of Publication:2017-05-01