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| Study on preparation and oxidation properties of Mo5Si3-Al2O3 composites |
| ZHANG Hong-xia1，CHEN Li1，CHEN Hui2 |
1. School of Materials Engineering， Xinxiang Vocational and Technical College， Xinxiang 453006， China
2. School of Materials Science and Engineering， Liaocheng University， Liaocheng 252000， China |
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Abstract Mo5Si3-Al2O3 composite was prepared by mechano-chemical reduction method and consolidated by hot pressing. The oxidation behavior of the composites at 600 ℃ was investigated. The results show that nano-scale Mo5Si3-Al2O3 composite is synthesized with MoO3， Mo， Si and Al powders as starting materials by mechanical milling for 10 h. The relative density and hardness of the Mo5Si3-Al2O3 composite reach 97.2% and 1 350 HV， respectively， higher than pure Mo5Si3. The addition of Al2O3 in the Mo5Si3 can effectively restrain its pest oxidation. Compared with Mo5Si3 alloy， the oxidation resistances of Mo5Si3-Al2O3 composite is remarkably improved and the oxidation behavior of the composite exhibits a similar parabolic law.
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Received: 04 August 2015
Published: 12 June 2016
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2016, Vol. 26 
