Influence of Y-addition and multilayer modulation on microstructure, oxidation resistance and corrosion behavior of Al0.67Ti0.33N coatings

被引：31
|
作者：
Mo, Jinjun [1 ]
Wu, Zhengtao [1 ]
Yao, Yuan [2 ]
Zhang, Quan [1 ]
Wang, Qimin [1 ]
机构：
[1] Guangdong Univ Technol, Sch Electromech Engn, Guangzhou 510006, Guangdong, Peoples R China
[2] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
来源：
SURFACE & COATINGS TECHNOLOGY | 2018年 / 342卷
关键词：
AlTiN; Y addition; Microstructure; Oxidation resistance; Corrosion resistance; TIALN HARD COATINGS; EROSION RESISTANCE; THERMAL-PROPERTIES; WEAR PERFORMANCE; BILAYER PERIOD; MAGNETRON; YTTRIUM; ALLOYS; DRY; CR;
D O I：
10.1016/j.surfcoat.2018.02.071
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this work, Al0.67Ti0.33N, Al0.65Ti0.33Y0.02N and Al0.67Ti0.33N/Al0.65Ti0.33Y0.02N multilayer coatings were deposited on cemented carbide by arc ion plating. The effects of yttrium addition and multilayer interface on structure, high-temperature oxidation and corrosion behaviors of the coatings were investigated. The oxidation of the coatings was carried out in a tube furnace in air at 900 degrees C for 2 h. The corrosion resistance of the coatings was investigated using a potentiodynamic polarization test. The morphology, elemental composition and phase structure of the coatings were determined by SEM, TEM, EDS and XRD. The multilayer structure and the yttrium addition produced refinement of the average grain sizes and densification of the microstructure. The TEM image of the Al0.67Ti0.33N and Al0.65Ti0.33Y0.02N show a nano-multilayer architecture attributed to the difference in ionization rates of Ti and Al. After the oxidation at 900 degrees C in air for 2 h, the oxidation resistance of the Al0.67Ti0.33N/Al0.65Ti0.33Y0.02N multilayer and the Al0.65Ti0.33Y0.02N coatings was higher than that of the Y-free Al0.67Ti0.33N. In addition, the Al0.67Ti0.33N/Al0.65Ti0.33Y0.02N multilayer coated specimen exhibits a low corrosion current density of 2.24 x 10(-5) A/cm(2) and a higher corrosion potential of 1.10 V, indicating the superior corrosion resistance.
引用
收藏
页码：129 / 136
页数：8
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