DC resistivity of alumina and zirconia sintered with TiC

[摘要] Pure alumina and zirconia powders were sintered separately with increasing amount of TiC up to ∼ 65 vol.%, as a conducting second phase with an aim to prepare conducting structural ceramics which can be precisely machined by EDM technique. TiC did not help in sintering the parent phase but it decreased the d.c. resistivity of the composite to 1 ohm.cm at ∼ 30 vol.% loading. The conductivity is explained by the effective media and percolation theories.

[学科分类] 材料工程

[关键词] Alumina;zirconia;titanium carbide;composite;electrical conductivity;electrical resistivity.