摘要
分析了以高硅铁尾矿合成的Si3N4粉和高钛渣为原料常压烧结制备的Si3N4/TiN复相陶瓷的常温导电性,并对其进行放电加工。研究结果表明,初始原料中20%(质量分数)左右的TiO2加入量是决定材料中TiN能否形成导电网络的最低TiO2加入量,此时材料的电阻率为4.25×10-2Ω.cm。烧结温度升高,材料的电阻率略有降低。随放电加工速度的增加,加工表面的粗糙度明显增加。
Room-temperature electrical conductivity property of Si3N4/TiN multiphase ceramics fabricated by Si3N4 powders from iron ore tailing and high titanium slag was investigated.Si3N4/TiN multiphase ceramics were machined by electrical discharge machining.The results show that the minimum amount of TiO2 in initial raw materials is about 20wt% for the formation of electroconductive network in the composites,of which the electric resistivity is 4.25×10-2Ω·cm.The electric resistivity decreases slightly with increasing the sintering temperature.Surface roughness increases significantly with the increase of speed of the electrical discharge machining.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2010年第12期2206-2209,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(50574030)
河北省自然科学基金资助项目(E2008000396)
关键词
Si3N4/TiN
复相陶瓷
导电性能
放电加工
Si3N4/TiN
multiphase ceramics
electrical conductivity property
electrical discharge machining
