Microstructure evolution,mechanical and tribological properties of Ti3(Al,Sn)C2/Al2O3 composites |
| |
Authors: | Shuai Wang Jun Cheng Shengyu Zhu Zhuhui Qiao Jun Yang Weimin Liu |
| |
Affiliation: | State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, PR China |
| |
Abstract: | In this paper, in situ formed Ti3(Al,Sn)C2/Al2O3 composites were fabricated by sintering the mixture of Ti3AlC2 and SnO2. The Al atoms could diffuse out of the Ti3AlC2 layered structure to react with SnO2, resulting in the formation of Ti3(Al,Sn)C2 solid solution and Al2O3. When the SnO2 content was 20?wt.%, the sintered Ti3(Al,Sn)C2/Al2O3 composite exhibited the best overall mechanical properties, because of the optimized cooperative strengthening effect of solution strengthening and Al2O3 enhancement. When the SnO2 content increased up to 30?wt.%, the flexural strength and fracture toughness of Ti3(Al,Sn)C2/Al2O3 composite dramatically decreased on account of the large accumulation of generated Al2O3. Moreover, according to the SiC ball-on-flat wear tests, it was found that the wear resistance of Ti3(Al,Sn)C2/Al2O3 composites was significantly improved as the SnO2 content increased. |
| |
Keywords: | MAX phase ceramics Microstructure Mechanical properties Tribological properties |
本文献已被 ScienceDirect 等数据库收录! |
|