Microstructure and tribological properties of NiCrAlY-Mo-Ag composite by vacuum hot-press sintering

被引：15
作者：
Li, Bo [1 ,2 ]
Gao, Yimin [1 ]
Han, Minmin [2 ]
Guo, Hongjian [2 ]
Wang, Wenzhen [2 ]
Jia, Junhong [2 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China
[2] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Gansu, Peoples R China
来源：
VACUUM | 2017年 / 143卷
基金：
中国国家自然科学基金;
关键词：
Hot-pressing sintering; Wear mechanism; High temperature; Compressive properties; Bonding strength; 1000; DEGREES-C; SELF-LUBRICATING COMPOSITES; NI-BASED SUPERALLOY; MECHANICAL-PROPERTIES; WEAR BEHAVIOR; NANOCOMPOSITE COATINGS; ELEVATED-TEMPERATURES; FRICTION; SILVER; ALLOY;
D O I：
10.1016/j.vacuum.2017.05.024
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The NiCrAIY-Mo-Ag composite was fabricated by vacuum hot-pressing sintering. The friction and wear behaviour of the composite were investigated from room temperature to 900 degrees C. Furthermore, the wear mechanism was studied over this wide range of temperatures. At the same time, the compressive properties of the composite were researched. The composition and microstructure of the composite were analyzed by X-ray diffraction (XRD) and scanning election microscopy (SEM). At 700 degrees C and 900 degrees C, the tribo-chemical reaction occurred on the worn surface and formed a high-temperature tribo-layer based on NiO and silver molybdates, which could effectively reduce the friction coefficient and wear rate of the composite. The existence of broken particles and the pullout of hard phase particles were seen on the fracture surface of the composite, which were determined by the interfacial bonding strength. (C) 2017 Elsevier Ltd. All rights reserved.
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页码：1 / 6
页数：6
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