TRIBOLOGICAL PROPERTIES OF Cu-Al2O3 COMPOSITES AT ELEVATED TEMPERATURES

被引：0
|
作者：
Hvizdos, Pavol [1 ]
Besterci, Michal [1 ]
Kulu, Priit [2 ]
机构：
[1] Slovak Acad Sci, Inst Mat Res, Kosice 04353, Slovakia
[2] Tallinn Univ Technol, EE-19086 Tallinn, Estonia
来源：
CHEMICKE LISTY | 2011年 / 105卷
关键词：
wear; copper; alumina; composite; PLASTIC-DEFORMATION; MICROSTRUCTURE; ALLOYS; COPPER; WEAR;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Two copper based composites with different grain size were studied: 1. MicroCu-Al2O3 composite (grain size 1-2 microns), and 2. NanoCu-Al2O3 nanocomposite prepared from the first one by ECAP. This procedure leads to 100-200 nm grain size. The tribological tests were conducted at temperatures from ambient up to 600 degrees C. The friction of the MicroCu composite was higher at 200 and 400 degrees C. At lower temperatures the NanoCu was about three times more wear resistant than the other one. At 400 degrees C and 600 degrees C both materials had the same properties and exhibited essentially zero volume loss thanks to formation of hard oxide layers.
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收藏
页码：S433 / S435
页数：3
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