Evaluation of tribological behavior of B4C-hBN ceramic composites under water-lubricated condition
Evaluation of tribological behavior of B4C-hBN ceramic composites under water-lubricated condition
复制标题
B4C·hBN陶瓷复合材料在水润滑条件下的摩擦学行为评价
DOI：
10.1016/j.ceramint.2015.02.050
复制
发表时间：
2015-07-01
影响因子：
5.2
通讯作者：
Song, Liancheng
中科院分区：
文献类型：
--
作者：
Li, Xiuqing;Gao, Yimin;Song, Liancheng
研究了六方氮化硼（hBN）对B4 C基陶瓷复合材料在蒸馏水润滑条件下摩擦学性能的影响。在销盘式摩擦磨损试验机上对不同hBN含量的热压B4 C-hBN陶瓷复合材料与纯B4 C陶瓷进行了水润滑滑动试验。结果表明，在B_4C陶瓷基体中加入hBN后，摩擦系数从B_4C/B_4C摩擦副的0.373下降到B_4C-20wt%hBN/B_4C摩擦副的0.005。B_2O_3在B_4C-hBN试样磨损表面形成的摩擦化学膜对B_4C-hBN和B_4C都有保护作用，有利于摩擦表面的光滑化。因此，摩擦副的摩擦学性能得到显著改善。讨论了该膜的形成过程及其减摩机理。(C)2015 Elsevier Ltd和Techna Group S.r.l. All rights reserved.
The aim of this study is to evaluate the influence of hexagonal boron nitride (hBN) addition on the tribological behavior of B4C-based ceramic composites under distilled water lubrication. Water-lubricated sliding tests of hot-pressed B4C-hBN ceramic composites with different hBN amounts against pure B4C ceramic were carried out on a pin-disc type wear apparatus. It was found that the addition of hBN into B4C ceramic matrix resulted in a severe decrease of the friction coefficient from 0.373 for B4C/B4C sliding pair to 0.005 for B4C-20 wt% hBN/B4C sliding pair. A B2O3 tribochemical film formed on the worn surface of the B4C-hBN specimen protected both B4C-hBN and B4C and facilitated the frictional surfaces to smooth. Therefore, the tribological behaviors of the pairs were significantly improved. The formation process of the film and its antifriction mechanism are discussed. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.