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Chin J Mater Res  2010, Vol. 24 Issue (3): 232-238    DOI:
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Effect of Mg-Y Oxides on the Microstructure and Properties of Fe--Mo/Si3N4 Cermet
YIN Ruiming 1,  FAN Jinglian 2,  LIU Xun 1,  ZHANG Shuguang1
1.State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083
2.College of Packaging and Material Engineering, Hunan University of Technology, Zhuzhou 412008
Cite this article: 

YIN Ruiming FAN Jinglian LIU Xun ZHANG Shuguang. Effect of Mg-Y Oxides on the Microstructure and Properties of Fe--Mo/Si3N4 Cermet. Chin J Mater Res, 2010, 24(3): 232-238.

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Abstract  

The paper proposes a dual-toughening method of ceramic, including metal composite and crystal whiskers strengthening, through adding Mg-Y oxides into Fe-Mo/Si3N4 cermet and subsequently consolidated by normal pressure sintering. The effects of Mg-Y oxides on the microstructure and properties of the Fe-Mo/Si3N4 cermet have been investigated. The results show that Fe and MoSi2 phases with good wettability on Si3N4 are formed in the Fe-Mo/Si3N4 cermet with Mg-Y oxides addition. Additionally, granular α-Si3N4 converts into whisker-shaped β-Si3N4, simultaneously with obvious densification, grain refinement and significantly improved properties, indicating that the dual-toughening method of the metal composite and the crystal whiskers have been realized.

Key words:  normal pressure sintering      ceramic      Mg-Y oxides      microstructure     
Received:  29 October 2009     
ZTFLH: 

O648

 
Fund: 

Supported by National Natural Science Foundation for Youths of China No.50804016 and National Natural Science Funds for Distinguished Young Scholars No.50925416.

URL: 

https://www.cjmr.org/EN/     OR     https://www.cjmr.org/EN/Y2010/V24/I3/232

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