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

(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, Ti3...

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Bibliographic Details
Published inCeramics international Vol. 42; no. 1; pp. 1 - 8
Main Authors Wang, Fen, Zhao, Yuanbo, Yang, Chenhui, Fan, Ningxia, Zhu, Jianfeng
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.01.2016
Subjects
(Ti,Mo)Al/Al2O3 composites
In situ hot-pressing
Mechanical property
Microstructure
(Ti,Mo)Al/Al2O3 composites
In situ hot-pressing
Microstructure
Mechanical property
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Summary:(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 1.0at% MoO3, doped the products possess the maximum value of 702MPa and 8.3MPam1/2 for the flexural strength and fracture toughness, respectively.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2015.08.138