Effect of MoO3 on microstructure and mechanical properties of (Ti,Mo)Al/Al2O3 composites by in situ reactive hot pressing

被引：24

作者：

Wang, Fen ^{[1
]}

Zhao, Yuanbo ^{[1
]}

Yang, Chenhui ^{[1
]}

Fan, Ningxia ^{[1
]}

Zhu, Jianfeng ^{[1
]}

机构：

[1] Shaanxi Univ Sci & Technol, Sch Mat Sci & Engn, Xian 710021, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2016年 / 42卷 / 01期

基金：

中国国家自然科学基金;

关键词：

(Ti; Mo)Al/Al2O3; composites; In situ hot-pressing; Mechanical property; Microstructure; HIGH-TEMPERATURE OXIDATION; TI2ALC/TIAL COMPOSITES; NB; TI; ALLOYS; TI3AL; MN;

D O I：

10.1016/j.ceramint.2015.08.138

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

(Ti,Mo)Al/Al2O3 composites were successfully synthesized by hot pressing based on the Ti-Al-TiO2-MoO3 system. Effect of MoO3 content on the microstructure and mechanical properties of (Ti,Mo)Al/Al2O3 composites was investigated in detail. It was found that the as-fabricated samples contain TiAl, Ti3Al, and Al2O3, together with a small amount of Ti2AlMo phase reinforcement phase. The fine Al2O3 particles dispersed on the TiAl matrix grain boundaries as a network structure and resulted in the improvement of room mechanical properties of the composites. With increasing of MoO3 contents, the flexural strength and fracture toughness of (Ti,Mo)Al/Al2O3 composites gradually increase, and with 1.0 at% MoO3, doped the products possess the maximum value of 702 MPa and 8.3 MPa m(1/2) for the flexural strength and fracture toughness, respectively. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：1 / 8

页数：8

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