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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摘要以B₄C颗粒与Mg锭为原材料,采用反应浸渗法制备B₄C质量分数为30%的电动机用B₄C/Mg复合材料,分析和测试不同制备温度下材料的组织结构与阻尼性能。结果表明：不规则形状的B₄C颗粒均匀分布于B₄C/Mg复合材料的基体中,未形成宏观孔洞。在B₄C颗粒边缘形成一层由碳化物与硼化物构成的白色物质。与基体材料Mg相比,B₄C/Mg复合材料的阻尼性能明显提高。随应变幅度增加,B₄C/Mg复合材料的阻尼性能先缓慢增加后迅速增加,制备温度越低,材料的阻尼性能越好。Cranato-Lücke曲线在有限应变振幅内呈直线变化。

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	齐冠然

关键词 ： B₄C/Mg复合材料, B₄C颗粒, 反应浸渗法, 显微组织, 阻尼性能, 应变幅度

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

收稿日期: 2019-04-23 出版日期: 2019-11-14

ZTFLH:

TG146.2

通讯作者: 齐冠然，讲师，硕士。E-mail: qijia2208000@126.com

引用本文:

齐冠然. 反应浸渗法制备电动机用B₄C颗粒增强Mg复合材料的组织及阻尼性能[J]. 粉末冶金材料科学与工程, 2019, 24(5): 474-477.
QI Guanran. Microstructure and damping properties of B₄C particle reinforced Mg composites for motor fabricated by reactive infiltration method. Materials Science and Engineering of Powder Metallurgy, 2019, 24(5): 474-477.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2019/V24/I5/474

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