Tribological properties of TiAl-Ag-ZnO self-lubricating composites from room temperature to 800 °C. (30th May 2018)

• Record Type: Journal Article
• Authors: Li, Ben; Li, Simian; Zhou, Hongyan; Yu, Jingui; Zhang, Qiaoxin; Xiao, Yong; Liu, Rong
• Is Part Of: Materials research express. Volume 5:Number 5(2018)
• Publication Date: 2018-05-30
• Subjects: dry sliding -- TiAl based composites -- solid lubricant -- worn surface; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/aac5c0
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: Tribological properties and lubricating mechanisms of TiAl-Ag-ZnO self-lubricating composites (TAZ) against Al2 O3 ball are studied from room temperature (RT) to 800 °C under a constant load of 10 N and a constant speed of 0.2 m s −1 . It is found that TAZ obtains the lower friction coefficients and smaller wear rates, if compared with TiAl alloys (T). Solid lubricant Ag achieves a good lubricating effect by forming smooth Ag-rich lubricating film on the worn surfaces of TAZ bellow 400 °C. While from 600 to 800 °C, the formed ZnO-rich lubricating film on the worn surfaces is beneficial to improving the tribological performance of TAZ. It can draw a conclusion that TAZ obtains the excellent tribological properties over a wide temperature range because of the synergistic effect of Ag and ZnO.