Microstructure and Properties of Mo-Based Composites Reinforced by Al2O3

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Mo-based composites with Al2O3 particles were developed in order to enhance the wear resistance of molybdenum alloys. Using Al2O3 power and pure Mo power as raw materials, the Molybdenum powders mixed with Al2O3 particles were prepared using planetary ball mill. And then the Mo-based composites with 3-10vol.% Alumina were prepared by compaction and sintering at 1840°C. The morphology of the Molybdenum powder and microstructure of the composites were analyzed by SEM and XRD. The micro-hardness, density and wear property of composites were researched. The results show that the microstructure of composites is composed of α-Al2O3 particles and Molybdenum matrix. With the increase of Alumina content, the microhardness of Molybdenum matrix increases, and the density first increases and then decreases. The friction coefficient of composite is scarcely affected by the alumina content. While the wear resistance of the composites rises with the increase of Alumina content. The wear failure is caused by abrasive wear characterized by obvious plow furrow and abrasive dust on the worn surface.

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Periodical:

Edited by:

Jiuba Wen, Fuxiao Chen, Ye Han and Huixuan Zhang

Pages:

467-470

DOI:

10.4028/www.scientific.net/AMM.120.467

Citation:

S. Z. Wei et al., "Microstructure and Properties of Mo-Based Composites Reinforced by Al2O3", Applied Mechanics and Materials, Vol. 120, pp. 467-470, 2012

Online since:

October 2011

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$38.00

[1] Deng Zinan, Guo Lei, Zhao Juan, et al: Rare Metals and Cemented Carbides Vol. 36(2008), p.24.

[2] Wang Donghui, Yuan Xiaobo, Li Zhongkui, et al.: Rare Metals Letters Vol. 25(2006), p.1.

[3] Zhang Giuxing, Liu Yanqin, Liu Danmin, et al.: The Chinese Journal of Nonferrous Metals Vol. 14(2004), p.13.

[4] B.V. Cockeram: Metall. Mater. Trans Vol. 33(2002), p.3685.

[5] Wu Xinguang and Du Xiaobin: China Molybdenum Industry Vol. 29 (2005), p.30.

[6] A. M. Molodets: High Pressure Res Vol. 25(2005), p.211.

[7] M. Nawa, T. Sekino and K. Niihara: Journal of Materials Science Vol. 29(1994), p.3185.

[8] Sheng-Chang Wang and Wen-Cheng J. Wei: Nanostructured Materials, Vol. 10(1998), p.983.

[9] Liu Kaiqi, Pan Wei, Fan Zhenkun, et al.: Rare metal materials and engineering Vol. 36(2007), p.238.

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