摘要
从理论和试验上对ＴｉＢ２ｘＦｅ复合体系的ＳＨＳ过程参数进行了分析。计算得到ＴｉＢ２４０％Ｆｅ（以摩尔计）的ＳＨＳ过程激活能为３９９ｋＪ／ｍｏｌ，接近Ｔｉ＋２Ｂ在低燃烧温度区域的反应过程激活能，预示着一种扩散控制机理。进行了ＳＨＳＱＰ技术制备密实金属陶瓷的研究，包括加压延迟、压力延续和压力大小等参数对产品密实度的影响。通过优化和控制有关参数，制备出了良好力学性能的金属陶瓷。
SHS process parameters in the synthesis of TiB 2 x Fe were analyzed theoretically and experimentally.The calculated activation energy for SHS of TiB 240%Fe(in mole) is 399kJ/mol,close to the activation energy of Ti+2B reaction in low temperature range,which indicates a diffusion controlled mechanism.The process of SHS plus a quick hydraulic press which was given a name SHSQP was used to produce dense cermet.The effects of pressing delay,pressing duration and pressure on the final products densities were studied.By optimizing the relevant parameters,dense cermet with good properties were made.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
1996年第6期654-659,共6页
Journal of The Chinese Ceramic Society
基金
国防科技预研基金
关键词
硼化钛
金属陶瓷
高温
加压
陶瓷
titanium diboride,cermets,self propagating high temperature synthesis plus quick pressing
