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W-5Re-xSiC复合材料的微观结构与力学性能
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1.武汉理工大学 材料复合新技术国家重点实验室;2.武汉理工大学 体育部

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国家自然科学基金(51521001,51572208),111项目(B13035),湖北省自然科学基金(2016CFA006),联合基金(6141A020222)


Microstructure and Mechanical Properties of W-5Re-xSiC Composites
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1.State Key Lab of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology;2.Dept of PE Wuhan University of Technology

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    摘要:

    为了提高W-5Re合金的室温强韧性,采用电弧熔炼法通过添加SiC制备高性能的W-5Re-xSiC复合材料,并研究SiC添加量(0.5wt% ~ 4wt%)对W-5Re-xSiC复合材料的微观结构和力学性能的影响规律。结果显示,W-5Re-xSiC复合材料主要由W(Re)固溶体相、W2C和W5Si3三相组成。随着SiC添加量的增加,基体晶粒细化,脆硬性的金属间化合物含量增加;W-5Re-xSiC复合材料的强韧性先提高后降低。当SiC添加量为1wt%时, 在基体的细晶强化和W5Si3韧化的共同作用下,W-5Re-1SiC复合材料的强韧性最佳,抗压强度为1859 MPa,断裂应变为32.87%。

    Abstract:

    In order to improve the room temperature strength and toughness of W-5Re alloy, SiC was added to form W-5Re-xSiC composites with high performance using vacuum arc melting. The relationship between the SiC content and the microstructure and mechanical properties of W-5Re-xSiC composites was investigated. The results show that the W-5Re-xSiC composites are mainly composed of W(Re) solid solution, W2C and W5Si3. As the SiC content is increased, the grain size of the W(Re) is refined and the contents of brittle intermetallic compounds are increased. The strength and fracture toughness of W-5Re-xSiC composites firstly increase and then decrease. When the SiC content is 1wt%, the strength and fracture toughness of the W-5Re-1SiC composite reach the maximum values of 1859 MPa and 32.87%, respectively, originating from the combination of grain refinement and W5Si3 toughening.

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罗国强,钱一昶,陈犇,胡业媛,魏琴琴,胡启林,张建,沈强. W-5Re-xSiC复合材料的微观结构与力学性能[J].稀有金属材料与工程,2020,49(1):125~130.[Luo Guoqiang, Qian Yichang, Chen Ben, Hu Yeyuan, Wei Qinqin, Hu qilin, Zhang Jian, Shen Qiang. Microstructure and Mechanical Properties of W-5Re-xSiC Composites[J]. Rare Metal Materials and Engineering,2020,49(1):125~130.]
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  • 收稿日期:2018-10-12
  • 最后修改日期:2018-11-26
  • 录用日期:2018-12-05
  • 在线发布日期: 2020-02-16
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