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首页> 外文期刊>Journal of Materials Engineering and Performance >Tribological Performance and Tribofilm Evolution of TiAl Matrix Composites with Silver and Titanium Diboride at Elevated Temperatures
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Tribological Performance and Tribofilm Evolution of TiAl Matrix Composites with Silver and Titanium Diboride at Elevated Temperatures

机译：高温下银和钛二硼化物的摩擦学性能和呋喃吡摩中的致枝子复合材料

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摘要

In order to understand the anti-friction and anti-wear mechanisms of silver (Ag) and titanium diboride (TiB2) at elevated temperatures, the tribological performance and tribofilm evolution of TiAl matrix composites with Ag and TiB2(TATs) are studied from 200 to 800 degrees C. The results illustrate that TATs exhibit excellent friction-reducing and anti-wear properties, which are attributed to the self-adjusted synergistic effect of Ag and TiB(2)in the wide temperature range. Besides, the testing temperatures have strong influence on the chemical structure and evolution of tribofilms. Within 400 degrees C, Ag migrates to worn surface and mixes with TiB(2)to form the Ag-rich tribofilms. At 600 degrees C, the lubricating effect of Ag diminishes and the oxidation of TiB(2)is limitation, hence there is no well-consolidated tribofilm on the worn surface. At 800 degrees C, Ag loses the lubricating capacity, while TiB(2)completely oxidizes to form B2O3, resulting in the formation of B2O3-rich tribofilms.
机译：为了了解升高温度下银（AG）和二硼化钛（TIB2）的抗摩擦和抗磨损机制，从200到200中研究了与AG和TIB2（TATS）的摩擦学性能和TIAL基质复合材料的培训演变800℃。结果说明TAT表现出优异的摩擦降低和抗磨损性能，其归因于AG和TIB（2）在宽温度范围内的自调节协同效应。此外，测试温度对呋喃酚的化学结构和演化产生了强烈影响。在400度C中，AG迁移到磨损表面并与TIB（2）混合以形成富含Ag的呋喃酚。在600℃下，AG的润滑效果减小和Tib（2）的氧化是有限的，因此在磨损的表面上没有良好固结的呋喃酚。在800摄氏度下，Ag失去润滑能力，而Tib（2）完全氧化以形成B2O3，导致形成B2O3的呋喃酚。

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