Microstructure, mechanical and tribological properties of multilayer TiAl/ TiAlN coatings on Al alloys by FCVA technology

被引：35
作者：
Cao, Hongshuai [1 ,2 ]
Li, Hao [1 ,2 ]
Liu, Fujia [1 ,2 ]
Luo, Wenzhong [1 ,2 ]
Qi, Fugang [1 ,2 ]
Zhao, Nie [1 ,2 ]
Ouyang, Xiaoping [1 ,2 ]
Liao, Bin [3 ]
机构：
[1] Xiangtan Univ, Sch Mat Sci & Engn, Xiangtan 411105, Hunan, Peoples R China
[2] Xiangtan Univ, Key Lab Low Dimens Mat & Applicat Technol, Minist Educ, Xiangtan 411105, Peoples R China
[3] Beijing Normal Univ, Coll Nucl Sci & Technol, Beijing 100875, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2022年 / 48卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Ceramic coatings; Multilayer TiAlN; N 2 flow rate; Microstructure; Properties; BEHAVIOR;
D O I：
10.1016/j.ceramint.2021.11.092
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In order to improve the surface properties of Al alloy, TiAlN ceramic coatings composed of alternating TiAl layer and TiAlN layer were prepared by FCVA technology. The influence of N2 flow rate on the microstructure, mechanical and tribological performance of multilayer TiAlN coatings was systematically studied. The results showed that the coating exhibited a multi-phase structure with mainly fcc TiAlN phase and a small amount of TiN and AlN phases. As the N2 flow rate increased from 50 to 80 sccm, the preferred orientation varied from TiAlN (220) plane to (111) plane due to lattice distortion. The hardness and elastic modulus of multilayer TiAlN coatings first increased and then decreased with the increase of N2 flow rate. However, the average friction coefficient and wear rate of multilayer TiAlN coatings exhibited an opposite trend to the hardness, H/E and H3/ E2 values. The adhesion gradually decreased from 27.3 to 14.9 N due to the continuous increase of the compressive stress in the coating with the increase of N2 flow rate. When the N2 flow rate was 70 sccm, the coating showed the lowest average friction coefficient and wear rate, which was attributed to the highest hardness and the best resistance to cracking and plastic deformation.
引用
收藏
页码：5476 / 5487
页数：12
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