Page 42 - 《摩擦学学报》2021年第2期
P. 42
第 41 卷 第 2 期 摩 擦 学 学 报 Vol 41 No 2
2021 年 3 月 Tribology Mar, 2021
DOI: 10.16078/j.tribology.2020100
添加Ag Nb O 的NiAl基复合材料的高温
11
2
4
摩擦学性能及高温润滑机理研究
1,3
1,3
1,2*
丰晓春 , 贾均红 , 高 强 , 杨晶晶 , 王文珍 , 易戈文 , 王齐华 1,3*
1,3
1,3
1,3
(1. 中国科学院兰州化学物理研究所 固体润滑国家重点实验室，甘肃 兰州 730000;
2. 陕西科技大学 机电工程学院，陕西 西安 710021;
3. 中国科学院大学 材料与光电研究中心，北京 100049)
摘 要: 首先采用高温固相反应法合成了由纳米球状结构紧密堆积的微米级粉体Ag 2 Nb 4 O 11 ，然后通过粉末冶金技
术制备了添加铌酸银(Ag 2 Nb 4 O 11 )的NiAl基复合材料(NABO20，NiAl-20%Ag 2 Nb 4 O 11 )，考察其对复合材料显微结
构、力学及摩擦学性能的影响. 结果表明：热压烧结过程中，Ag 2 Nb 4 O 11 发生高温分解及与C发生氧化还原反应，形成
了NbC和Ag相. 铌酸银(Ag 2 Nb 4 O 11 )的添加使得复合材料的密度略有增加，并且显著改善了NiAl基复合材料的显微
硬度. 在高温摩擦条件下(800 ℃)，由于NABO20磨损表面和Al 2 O 3 对偶球表面均形成完整光滑的润滑膜(Nb 2 O 5 、
Al 2 O 3 、Ag 2 Nb 4 O 11 、AgNbO 3 和AgNb 3 O 8 )，两层膜的存在阻隔了对偶球和复合材料的直接接触，抑制了磨损进程，从
而有效地提高了复合材料的耐磨性能.
关键词: 粉末冶金; Ag 2 Nb 4 O 11 ; 润滑膜; 耐磨性; 高温润滑机理
中图分类号: TH117.3 文献标志码: A 文章编号: 1004-0595(2021)02–0187–10
High Temperature Tribological Properties and High-
Temperature Lubrication Mechanism of NiAl-Based
Composites with the Addition of Ag Nb O 11
2
4
1,3
1,3
1,3
1,3
1,2*
FENG Xiaochun , JIA Junhong , GAO Qiang , YANG Jingjing , WANG Wenzhen ,
1,3
YI Gewen , WANG Qihua 1,3*
(1. Sate Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese
Academy of Sciences, Gansu Lanzhou 730000, China
2. College of Mechanical and Electrical Engineering, Shaanxi University of Science &
Technology, Shaanxi Xi’an 710021, China
3. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of
Sciences, Beijing 100049, China)
Abstract: The Ag 2 Nb 4 O 11 powders with micro grade particle were synthesized by high-temperature solid state reaction
method, then NiAl-based composites with the addition of Ag 2 Nb 4 O 11 (NABO20, NiAl-20%Ag 2 Nb 4 O 11 ) were prepared
by powder metallurgy technology. The influence of silver niobates (Ag 2 Nb 4 O 11 ) on the microstructure, mechanical
properties and tribological behaviors of NiAl-based composites at elevated temperatures was investigated. The results
showed that the Ag 2 Nb 4 O 11 phase was decomposed and reacted with C element to form NbC and Ag phase in hot-
pressing sintering process. The addition of Ag 2 Nb 4 O 11 slightly increased the density of composite and significantly
Received 26 May 2020, revised 26 June 2020, accepted 28 June 2020, available online 28 March 2021.
*Corresponding author. E-mail: jhjia@sust.edu.cn; qhwang@licp.cas.cn, Tel: +86-931-4968611..
The project was supported by the National Science Foundation of China (51575505, 51675508).
国家自然科学基金项目(51575505, 51675508)资助.
