反应浸渗法制备电动机用B<sub>4</sub>C颗粒增强Mg复合材料的组织及阻尼性能

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Abstract Using B₄C particles and Mg ingot as raw materials, B₄C/Mg composites with 30% B₄C mass fraction for motor were prepared by reactive infiltration method. The micro structure and damping properties of materials prepared at different temperatures were analyzed and tested. The results show that the irregular B₄C particles are evenly distributed in the matrix of B₄C/Mg composites, and no macroscopic holes are formed. A white layer of carbide and boride is formed at the edge of B₄C particles. Compared with the Mg matrix, the damping performance of B₄C/Mg composite is significantly improved. With the increase of strain amplitude, the damping property of B₄C/Mg composite material shows a change rule of slow increase first and then rapid increase. The lower the preparation temperature, the better the damping property of the material. The Cranato-lucke curve varies linearly in the amplitude of finite strain.

Key words： B₄C/Mg composite material B₄C particles reaction leaching method microstructure damping property strain amplitude

Received: 23 April 2019 Published: 14 November 2019

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TG146.2

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Cite this article:

QI Guanran. Microstructure and damping properties of B₄C particle reinforced Mg composites for motor fabricated by reactive infiltration method[J]. Materials Science and Engineering of Powder Metallurgy, 2019, 24(5): 474-477.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2019/V24/I5/474

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