简介概要

Microstructure, mechanical and tribological properties of TiAl-based composites reinforced with high volume fraction of nearly network Ti2AlC particulates

来源期刊:JOURNAL OF MATERIALS SCIENCE TECHNOLOG2018年第4期

论文作者:Jun Cheng Shengyu Zhu Yuan Yu Jun Yang Weimin Liu

文章页码:670 - 678

摘    要:TiAl-based composites reinforced with different high volume fractions of nearly network Ti2AlC phase have been successfully prepared by mechanical alloying and hot-pressing method. Their microstructure,mechanical and tribological properties have been investigated. Ti2AlC network becomes continuous but the network wall grows thicker with increasing the Ti2AlC content. The continuity and wall size of the network Ti2AlC phase exert a significant influence on the mechanical properties. The bending strength of the composites first increases and then decreases with the Ti2AlC content. The compressive strength of the composite decreases slightly compared to the TiAl alloy, but the hardness is enhanced. Due to the high hardness and load-carrying capacity of the network structure, these composites have the better wear resistance. And this enhancement is more notable at low applied loads and high Ti2AlC content. The mechanisms simulating the role of network Ti2AlC phase on the wear behavior and the wear process of TiAl/Ti2AlC composites at different applied loads have been proposed.

详情信息展示

Microstructure, mechanical and tribological properties of TiAl-based composites reinforced with high volume fraction of nearly network Ti2AlC particulates

Jun Cheng,Shengyu Zhu,Yuan Yu,Jun Yang,Weimin Liu

State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences

摘 要:TiAl-based composites reinforced with different high volume fractions of nearly network Ti2AlC phase have been successfully prepared by mechanical alloying and hot-pressing method. Their microstructure,mechanical and tribological properties have been investigated. Ti2AlC network becomes continuous but the network wall grows thicker with increasing the Ti2AlC content. The continuity and wall size of the network Ti2AlC phase exert a significant influence on the mechanical properties. The bending strength of the composites first increases and then decreases with the Ti2AlC content. The compressive strength of the composite decreases slightly compared to the TiAl alloy, but the hardness is enhanced. Due to the high hardness and load-carrying capacity of the network structure, these composites have the better wear resistance. And this enhancement is more notable at low applied loads and high Ti2AlC content. The mechanisms simulating the role of network Ti2AlC phase on the wear behavior and the wear process of TiAl/Ti2AlC composites at different applied loads have been proposed.

关键词:

<上一页 1 下一页 >

有色金属在线官网  |   会议  |   在线投稿  |   购买纸书  |   科技图书馆

中南大学出版社 技术支持 版权声明   电话:0731-88830515 88830516   传真:0731-88710482   Email:administrator@cnnmol.com

互联网出版许可证:(署)网出证(京)字第342号   京ICP备17050991号-6      京公网安备11010802042557号