導電性セラミックス複合材料の引張り応力と圧縮応力による電気抵抗の変化

概要

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Electrical and mechanical properties of ceramic composites were investigated in order to establish a fracture prediction technique. Ceramic composites consist of calcium fluoride as an insulating matrix and silicon carbide as electrically conductive additives. An electrical conduction path was formed by adding more than 4 vol% of SiC additives in the composites and the fracture strength increased by the increase of SiC additives. By applying mechanical load, electrical resistance of the composites increased up to fracture under tension while did not change or slightly decreased under compression. The changes in electrical resistance were suggested to occur by the change of connectivity of conduction path in the composites. These results suggest the possibility of predicting fracture in ceramic composites.
社団法人日本セラミックス協会の論文
1995-06-01