Ultra-High-Hardness (Ti, W)C Matrix Metal Ceramics Prepared Through Combustion Synthesis under High Gravity
(Ti,W)C matrix metal ceramics were prepared through combustion synthesis under high gravity,structure formation mechanism of the ceramics was discussed and the properties of the ceramics were also measured. XRD and FESEM images show the matrix of metal ceramics was mainly composed of TiC and (Ti,W)C1-x. The formation mechanism mainly involves two stages: firstly,combustion reaction is advanced rapidly under high gravity,and the layered melt consisting of Ti-W-Fe-C-B liquid at the bottom and oxide liquid at the top is formed due to rapid liquid-liquid separation under high gravity, subsequently,TiC solids as the primary phase precipitates from Ti-W-Fe-C-B liquid due to the higher concentration and faster diffusion of C relative to B in the alloy liquid,whereas (Ti,W)C1-x solid nucleates and grows on the surface of TiC solids. The Vickers hardness,flexural strength and fracture toughness of the (Ti,W)C matrix Metal ceramics measured 25.6 GPa,1060 MPa and 8.5 MPa·m1/2, respectively.
Titanium carbides Combustion synthesis High gravity solidification
Chuanzeng Pan Long Zhang Zhongmin Zhao Jing Zhang Guanling Su
Laboratory of Special Ceramics,Institute of Advanced Materials,Mechanical Engineering College,Shijia Laboratory of Special Ceramics,Institute of Advanced Materials,Mechanical Engineering College,Shijia Department of Basic Course,Mechanical Engineering College,Shijiazhuang 50003,China
国际会议
Frist Annual Meeting on Testing and Evaluation of Inorganic Materials(第一届全国无机材料测试与评价学术年会)
南昌
英文
144-147
2010-04-28（万方平台首次上网日期，不代表论文的发表时间）