Wear behaviour of Al2O3-Mo and Al2O3-Nb composites

被引：46

作者：

de Portu, Goffredo ^{[1
]}

Guicciardi, Stefano ^{[1
]}

Melandri, Cesare ^{[1
]}

Monteverde, Frederic ^{[1
]}

机构：

[1] CNR, ISTEC, I-48018 Faenza, Italy

来源：

WEAR | 2007年 / 262卷 / 11-12期

关键词：

ceramic-metal composites; alumina-molybdenum composite; alumina-niobium composite; sliding wear; friction;

D O I：

10.1016/j.wear.2007.01.010

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The wear behaviour of two Al2O3-Mo and two Al2O3-Nb particulate composites with different Mo particle size and Nb contents, respectively, obtained by hot-pressing, was evaluated. The inverted pin-on-disc tests were performed by making ceramic pins slide against WC discs at different loads with a constant sliding speed and sliding distance. When the load increased the specific wear of alumina-molybdenum composites increased dramatically while the wear of alumina-niobium material remained almost constant inspite of the increase of the applied load. On the other hand, the wear of the WC discs was very low against Al2O3-Mo but extremely high against Al2O3-Nb composites. It was also found that the friction coefficient strongly depends on the applied load but weakly on the pin material. The lower the load the higher the friction. A possible explanation of the wear mechanisms is proposed. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：1346 / 1352

页数：7

共 21 条

[1] MICROSTRUCTURAL DESIGN OF TOUGHENED CERAMICS [J].