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W-5Re-xSiC復合材料的微觀結(jié)構與力學性能
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作者單位:

1.武漢理工大學 材料復合新技術國家重點實驗室;2.武漢理工大學 體育部

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基金項目:

國家自然科學基金(51521001,51572208),111項目(B13035),湖北省自然科學基金(2016CFA006),聯(lián)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:

    為了提高W-5Re合金的室溫強韌性，采用電弧熔煉法通過添加SiC制備高性能的W-5Re-xSiC復合材料，并研究SiC添加量(0.5wt% ~ 4wt%)對W-5Re-xSiC復合材料的微觀結(jié)構和力學性能的影響規(guī)律。結(jié)果顯示，W-5Re-xSiC復合材料主要由W(Re)固溶體相、W2C和W5Si3三相組成。隨著SiC添加量的增加，基體晶粒細化，脆硬性的金屬間化合物含量增加；W-5Re-xSiC復合材料的強韌性先提高后降低。當SiC添加量為1wt%時, 在基體的細晶強化和W5Si3韌化的共同作用下，W-5Re-1SiC復合材料的強韌性最佳，抗壓強度為1859 MPa，斷裂應變?yōu)?2.87%。

    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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羅國強,錢一昶,陳犇,胡業(yè)媛,魏琴琴,胡啟林,張建,沈強. W-5Re-xSiC復合材料的微觀結(jié)構與力學性能[J].稀有金屬材料與工程,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.]
DOI：10.12442/j. issn.1002-185X.20181034

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  • 收稿日期:2018-10-12
  • 最后修改日期:2018-11-26
  • 錄用日期:2018-12-05
  • 在線發(fā)布日期: 2020-02-16
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