Equivalent resistance in pulse electric current sintering

Abstract

The sintering resistance for conductive TiB₂ and non-conductive Al₂O₃ as well as empty die during pulse current sintering were investigated in this paper. Equivalent resistances were measured by current and valtage during sintering the conductive and non-conductive materials in the same conditions. It is found that the current paths for conductive are different from those for non-conductive materials. For non-conductive materials, sintering resistances are influenced by powder sizes and heating rates, which indicates that pulse current has some interaction with non-conductive powders. For conductive TiB₂, sintering resistances are influenced by heating rates and ball-milling time, which indicates the effect of powders activated by spark.

Keywords

resistance / pulse electric current sintering / interaction

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