Mechanical properties and thermal shock resistance of tungsten alloys strengthened by laser fragmentation-processed zirconium carbide nanoparticles
Mechanical properties and thermal shock resistance of tungsten alloys strengthened by laser fragmentation-processed zirconium carbide nanoparticles
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DOI：
10.1007/s42864-020-00071-5
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Chang-Song Liu
中科院分区：
文献类型：
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作者：
Ke Jing;Chao Zhang;Rui Liu;Zhuo-Ming Xie;Lin-Chao Zhang;Li-Feng Zhang;Jun Liu;Jun-Feng Yang;Xian-Ping Wang;Ting Hao;Xue-Bang Wu;Qian-Feng Fang;Chang-Hao Liang;Guang-Nan Luo;You-Yun Lian;Xiang Liu;Chang-Song Liu
Zirconium carbide (ZrC) nanoparticles with an average size of 5.6 nm were synthesized through laser fragmentation (LF).from as-received 20–60 nm ZrC particles, and LF-ZrC nanoparticle dispersion-strengthened tungsten (LF-WZC) samples.were fabricated by spark plasma sintering method. The average grain size of LF-WZC is 1.91 μm and most ZrC particles in.LF-WZC are smaller than 10 nm. LF-WZC exhibits fner grain size, higher yield strength and hardness but lower ductility.as compared with W-ZrC samples using as-received ZrC (WZC). The results showed that fner ZrC nanoparticles dispersed.in tungsten can enhance the strength by hindering the motion of dislocations, but they may also introduce stress concentration and thus reduce the ductility. The thermal shock resistance of the WZC and LF-WZC samples was investigated using.an electron beam device. The LF-WZC sample also exhibits a higher cracking threshold (0.33–0.44 GW·m−2) than WZC.(0.22–0.33 GW·m−2) at room temperature. The enhanced thermal shock resistance of LF-WZC could be attributed to its.high yield strength.
