文献类型：期刊文献

英文题名：Fabrication of Ultra-Fine-Grained W-TiC Alloys by a Simple Ball-Milling and Hydrogen Reduction Method

作者：Lang, Shaoting[1];Sun, Ningbo[2,3];Cao, Junhui[1];Yu, Weixin[1];Yang, Zhijun[1];Hou, Shusen[1]

第一作者：郎少庭

通讯作者：Sun, NB[1];Sun, NB[2]

机构：[1]Xinxiang Univ, Sch Mech & Elect Engn, Xinxiang 453000, Henan, Peoples R China;[2]Foshan Inst New Mat, Foshan 528200, Peoples R China;[3]Xinxiang Univ, Sch Chem & Mat Engn, Xinxiang 453000, Henan, Peoples R China

第一机构：新乡学院机电工程学院

通讯机构：[1]corresponding author), Foshan Inst New Mat, Foshan 528200, Peoples R China;[2]corresponding author), Xinxiang Univ, Sch Chem & Mat Engn, Xinxiang 453000, Henan, Peoples R China.|[11071]新乡学院;

年份：2021

卷号：14

期号：19

外文期刊名：MATERIALS

收录：;EI(收录号：20214211029922);Scopus(收录号：2-s2.0-85116959546);WOS:【SCI-EXPANDED(收录号:WOS:000725608300001)】；

基金：FundingThis work was supported by the National Natural Science Foundation of China (grant numbers: 51801171 and 52001270) and the Foundation for Basic and Applied Basic Research of Guangdong Province (grant number: 2019A1515110725).

语种：英文

外文关键词：W-TiC alloys; ball-milling method; core-shell structure; mechanical properties; microstructures

摘要：In this paper, a simple method to fulfill the ideal microstructural design of particle reinforced tungsten (W) alloys with promising mechanical properties is presented. W-0.5 wt.% TiC powders with core-shell (TiC/W) structure are prepared by ball-milling and controlled hydrogen reduction processes. TEM observation demonstrates that the nano TiC particles are well coated by tungsten. The W-TiC powders are sintered by spark plasma sintering (SPS) under 1600 & DEG;C. The sintered microstructures are characterized by FESEM and TEM. It is found that the W-0.5TiC alloys obtain an ultra-fine-sized tungsten grain of approximately 0.7 mu m. The TiC particles with the original nano sizes are uniformly distributed both in tungsten grain interiors and at tungsten grain boundaries with a high number density. No large agglomerates of TiC particles are detected in the microstructure. The average diameter of the TiC particles in the tungsten matrix is approximately 47.1 nm. The mechanical tests of W-0.5 TiC alloy show a significantly high microhardness and bending fracture strength of 785 Hv(0.2) and 1132.7 MPa, respectively, which are higher than the values obtained in previous works. These results indicate that the methods used in our work are very promising to fabricate particle-dispersion-strengthened tungsten-based alloys with high performances.