Synthesis and tribological properties of ultrafine Cr2AlC MAX phase

Lian TAN; Chunlong GUAN; Ye TIAN; Pei DANG; Shun WANG; Jinling LI; Wenfeng LI; Zhiwei ZHAO

doi:10.2109/jcersj2.18184

Regular Issue: Full papers

Synthesis and tribological properties of ultrafine Cr₂AlC MAX phase

Lian TAN, Chunlong GUAN, Ye TIAN, Pei DANG, Shun WANG, Jinling LI, Wenfeng LI, Zhiwei ZHAO

Author information

Lian TAN
North China University of Water Resources and Electric Power, School of Electric Power
Chunlong GUAN
Henan University of Technology, School of Materials Science and Engineering, Engineering Laboratory of High Temperature Resistance-wear Materials
Ye TIAN
Henan University of Technology, School of Mechanical and Electrical Engineering
Pei DANG
Henan University of Technology, School of Mechanical and Electrical Engineering
Shun WANG
Henan University of Technology, School of Materials Science and Engineering, Engineering Laboratory of High Temperature Resistance-wear Materials
Jinling LI
Henan University of Technology, School of Materials Science and Engineering, Engineering Laboratory of High Temperature Resistance-wear Materials
Wenfeng LI
Henan University of Technology, School of Materials Science and Engineering, Engineering Laboratory of High Temperature Resistance-wear Materials
Zhiwei ZHAO
Henan University of Technology, School of Materials Science and Engineering, Engineering Laboratory of High Temperature Resistance-wear Materials

Keywords: Cr₂AlC powder, Ultrafine Cr₂AlC powder, Microwave hybrid heating, Tribological properties

JOURNAL FREE ACCESS

2019 Volume 127 Issue 10 Pages 754-760

DOI https://doi.org/10.2109/jcersj2.18184

Details

Abstract

A microwave hybrid heating method was used for the synthesis of Cr₂AlC powder using two carbon sources of graphite and Cr₃C₂, and tribological behaviour of Cr₂AlC powders was investigated. The purity of Cr₂AlC is sensitive to the synthesis temperature and the starting materials used. For a Cr/Al/C system, Cr₂AlC with a small amount of Cr₇C₃ was synthesised at 1100°C for 3 min. For Cr/Al/Cr₃C₂ system, high purity Cr₂AlC was synthesized at 1050°C for 3 min. Ultrafine Cr₂AlC powder with a grain diameter of less than 500 nm (denoted by u-Cr₂AlC) could be prepared by ball-milling and ultrasonic treatment. The tribological properties of as-synthesised and ultrafine Cr₂AlC powders as an additive in 150SN base oil were evaluated by an MMW-1A four-ball friction and wear tester. The results show that the base oil containing 2 wt % Cr₂AlC presented good tribological performance under a load of 300 N. In addition, the particle size plays an important role in the tribological performance. Ultrafine Cr₂AlC powder shows a better tribological performance than MoS₂ and as-synthesised Cr₂AlC. The improved tribological properties of the u-Cr₂AlC sample could be attributed to the formation of a tribo-film under friction.

Corresponding author

Register with J-STAGE for free!