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金属学报  2009, Vol. 45 Issue (3): 297-301    
  论文 本期目录 | 过刊浏览 |
NiAl--Cr(Mo)--Ho--Hf共晶合金的高温磨损特性
王振生1;2;郭建亭1;周兰章1;盛立远1;胡壮麒1
1 中国科学院金属研究所; 沈阳 110016
2 湖南科技大学机电工程学院; 湘潭 411201
HIGH TEMPERATURE WEAR BEHAVIOR OF NiAl--Cr(Mo)--Ho--Hf EUTECTIC ALLOY
WANG Zhensheng1;2;GUO Jianting1;ZHOU Lanzhang1;SHENG Liyuan1;HU Zhuangqi1
1 Institute of Metal Research; Chinese Academy of Sciences; Shenyang 110016
2 School of Electromechanical Engineering; Hunan University of Science and Technology; Xiangtan 411201
引用本文:

王振生 郭建亭 周兰章 盛立远 胡壮麒. NiAl--Cr(Mo)--Ho--Hf共晶合金的高温磨损特性[J]. 金属学报, 2009, 45(3): 297-301.
, , , , . HIGH TEMPERATURE WEAR BEHAVIOR OF NiAl--Cr(Mo)--Ho--Hf EUTECTIC ALLOY[J]. Acta Metall Sin, 2009, 45(3): 297-301.

全文: PDF(990 KB)  
摘要: 

采用滑动磨损实验测试了NiAl--28Cr--5.6Mo--0.25Ho--0.15Hf(原子分数, %)共晶合金与SiC陶瓷配副在600---1000 ℃下的摩擦磨损特性. 结果表明, 在700---900 ℃下合金表现出优异的自润滑耐磨性能, 这种特性源于共晶合金摩擦表面生成了1---3 μm厚的玻璃陶瓷润滑膜, 该润滑膜可向SiC表面转移, 形成玻璃陶瓷/玻璃陶瓷的摩擦状态. 随着温度的升高, 共晶合金与润滑膜的强度降低, SiC微粒压入润滑膜, 导致润滑膜的剥落加剧、共晶合金磨损率升高. 共晶合金在600 ℃下由于未形成润滑膜而发生较严重的磨粒磨损, 摩擦系数和磨损率很高.

关键词 NiAl--Cr(Mo)--Ho--Hf共晶合金SiC陶瓷摩擦磨损性能自润滑玻璃陶瓷膜    
Abstract

The wear behaviors of NiAl--28Cr--5.6Mo--0.25Ho--0.15Hf eutectic alloy against SiC ceramic under dry sliding from 600 to 1000 ℃ were investigated on a pin--on--disc test rig. The results show that the eutectic alloy exhibits excellent self--lubricating properties in the temperature range of 700---900 ℃, which is attributed to the formation of 1---3 μm thick glass--ceramic lubricant film. During wear testing the lubricant film was partially transferred to the SiC counterface, which avoided the direct tribo--contact between the alloy and SiC ceramic. At temperatures above 900 ℃ or below 700 ℃ the friction coefficient and wear rate are higher, owing to the adhesion between matrix and film weakening or no film forming.

Key wordsNiAl--Cr(Mo)--Ho--Hf eutectic alloy    SiC ceramic    friction and wear behavior    self--lubricating    glass--ceramic film
收稿日期: 2008-08-04     
ZTFLH: 

TH117.1

 
作者简介: 王振生, 男, 1978年生, 讲师, 博士生

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