Dry-Sliding Tribological Properties of TiAl Alloys and Ti2AlN/TiAl Composites at High Temperature

作者：Zhang, Ningbo^*; Sun, Dongli; Han, Xiuli; Wang, Daqun; Wang, Qing; Liu, Hao; Yu, Zhenhe

来源：Journal of Materials Engineering and Performance, 2018, 27(11): 6107-6117.

DOI：10.1007/s11665-018-3682-2

• dry sliding
• high temperature
• Ti2AlN
• TiAl composite
• tribological properties

The dry-sliding tribological properties of TiAl alloy and its composite Ti2AlN/TiAl were investigated comparatively in the temperature range of 25-800 degrees C. The wear test results showed the wear resistance of TiAl alloy and Ti2AlN/TiAl composite from 25 to 400 degrees C was poor, but it improved obviously when temperature was above 600 degrees C. Also, 15vol.% incorporation of Ti2AlN particles was beneficial to improve the friction and wear properties of TiAl. Protective oxide layer generated on the wear surface of 15vol.% Ti2AlN/TiAl composite from 25 to 400 degrees C, hence, the wear resistance improved. Ti2AlN particles played a load-carrying role and inhabited the delamination of enamel layer effectively when the temperature was above 800 degrees C. Overall, Ti2AlN particles which acted as hard spots changed the state of wear surface and further provided a second phase strengthening effect, which resulted in the difference in tribological behaviors between TiAl alloy and its composite.

• 出版日期2018-11
• 单位哈尔滨工业大学