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Microstructures and Room Temperature Mechanical Properties of Mo-12Si-8.5B-8Cr Alloy

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Abstract

Microstructures and room temperature mechanical properties of Mo-12Si-8.5B and Mo-12Si-8.5B-8Cr alloys were investigated. The alloys, which were prepared by spark plasma sintering at various temperatures, were analyzed using scanning electron microscopy, x-ray diffraction, vicker hardness test, and three-point bending test. Moss matrix with uniformly distributed intermetallic phases of Mo3Si and Mo5SiB2 were observed in the microstructures of both Mo-12Si-8.5B and Mo-12Si-8.5B-8Cr alloys. The solution of Cr in solid phases of Mo, Mo3Si and Mo5SiB2 phases was detected. Hardness and room temperature flexure strength of two alloys increased with the increase in sintering temperature. Under the same sintering conditions, the addition of Cr obviously decreased the porosity of Mo-12Si-8.5B sintered body, and significantly increased the hardness, room temperature flexure strength and fracture toughness.

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Acknowledgements

This project was supported by the National Natural Science Foundation of China (Grant No. 51475161), Research Foundation of Education Bureau of Hunan Province (grant No. 15A059), and Project supported by State Key Laboratory of Powder Metallurgy of Central South University).

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Authors and Affiliations

  1. Hunan Provincial Key Defense Laboratory of High Temperature Wear Resisting Materials and Preparation Technology, Hunan University of Science and Technology, Xiangtan, 411201, China

    Yan Jianhui, Wang Yi, Zhou Peng, Qiu Jingwen & Wang Yueming

  2. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China

    Yan Jianhui

Authors
  1. Yan Jianhui
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  2. Wang Yi
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  3. Zhou Peng
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  4. Qiu Jingwen
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  5. Wang Yueming
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Correspondence to Yan Jianhui.

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Jianhui, Y., Yi, W., Peng, Z. et al. Microstructures and Room Temperature Mechanical Properties of Mo-12Si-8.5B-8Cr Alloy. Trans Indian Inst Met 71, 245–251 (2018). https://doi.org/10.1007/s12666-017-1173-z

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  • DOI: https://doi.org/10.1007/s12666-017-1173-z

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