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High-Temperature Tribological Behaviors of In Situ–Formed TiAl-TiB2 Composites in Low-Pressure Oxygen
Tribology Transactions ( IF 2.0 ) Pub Date : 2021-07-19 , DOI: 10.1080/10402004.2021.1942357
Long Wang 1 , Dongsheng Yang 1 , Jiao Chen 1 , Hui Tan 1 , Shengyu Zhu 1 , Jun Cheng 1
Affiliation  

Abstract

The tribological behaviors of in situ–formed TiAl-TiB2 composites were investigated from room temperature to 800 °C in low-pressure oxygen and related to their hardness and partial tribo-oxidation behaviors on the frictional surface. The wear resistance of TiAl-TiB2 composites in low-pressure oxygen is significantly enhanced when the TiB2 content increases from 0 to 20 vol% but decreases with a further increase in TiB2 content to 30 and 40 vol%. The wear rates of the TiAl-TiB2 composites are low below 200 °C and increase within 400–600 °C due to their decreased hardness and reach minimum values at 800 °C. The hardness of the composites and the degree of surface tribo-oxidation codetermine the wear resistance.



中文翻译:

原位形成的 TiAl-TiB2 复合材料在低压氧气中的高温摩擦学行为

摘要

研究了原位形成的 TiAl-TiB 2复合材料在低压氧气中从室温到 800 °C的摩擦学行为,并与它们的硬度和摩擦表面的部分摩擦氧化行为有关。当TiB 2含量从0 vol%增加到20 vol%时,TiAl-TiB 2复合材料在低压氧气中的耐磨性显着提高,但随着TiB 2含量进一步增加到30和40 vol%而下降。TiAl-TiB 2的磨损率复合材料在 200 °C 以下时低,并在 400-600 °C 内增加,因为它们的硬度降低,并在 800 °C 时达到最小值。复合材料的硬度和表面摩擦氧化程度共同决定了耐磨性。

更新日期:2021-09-23
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