Ultra-High Strength TiC/Refractory High-Entropy-Alloy Composite Prepared by Powder Metallurgy
Ultra-High Strength TiC/Refractory High-Entropy-Alloy Composite Prepared by Powder Metallurgy
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粉末冶金制备超高强度TiC/耐火高熵合金复合材料
DOI：
10.1007/s11837-017-2267-0
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发表时间：
2017-04-01
期刊：
影响因子：
2.6
通讯作者：
Liu, Yong
中科院分区：
文献类型：
--
作者：
Liu, Bin;Wang, Jingshi;Liu, Yong
采用新型反应烧结法制备了以高熵合金为粘结剂的TiC基陶瓷复合材料。在此过程中，难熔碳化物粉末与Ti粉在高温下反应，原位生成Ti碳化物和难熔HEA相。结果表明，反应烧结后，只生成体心立方HEA相和TiC相。复合材料的显微组织均匀，由平均粒径为0.85 μ m的超细TiC颗粒和平均粒径为1.8 μ m的HEA颗粒组成。TiC/HEA复合材料显示出超高的室温压缩强度（> 3000 MPa），而常规TiC金属陶瓷的压缩强度为1790-2210 MPa。
A TiC-based ceramic composite with refractory high-entropy-alloy (HEA) binders was developed through a novel reactive sintering method. In the process, refractory carbide powders were reacted with Ti powder at high temperature, and in situ formation of Ti carbides and refractory HEA phases occurred. The results indicate that only body-centered-cubic HEA phases and TiC phases are formed after the reactive sintering. The microstructure of the composite is homogeneous, consisting of ultra-fine TiC particles with an average size of 0.85 mu m and HEA grains with an average grain size of 1.8 mu m. The TiC/HEA composite shows an ultra-high room-temperature compressive strength (> 3000 MPa), compared to 1790-2210 MPa for the conventional TiC cermets.