Room-Temperature Electrical Conductivity Property of Si3N4/TiN Composite Ceramics
Room-temperature electrical conductivity property of Si3N4/TiN composite ceramics fabricated by Si3N4 powders from iron ore tailing and high titanium slag was investigated. Si3N4/TiN composite 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 4.25×10-2•cm. The electric resistivity decreases slightly with increasing the sintering temperature. Surface roughness enhances significantly with the speed of the electrical discharge machining rising.
Jinglong Bu, Zhengyi Jiang and Sihai Jiao
S. H. Zhang et al., "Room-Temperature Electrical Conductivity Property of Si3N4/TiN Composite Ceramics", Advanced Materials Research, Vols. 150-151, pp. 257-261, 2011