Densification Rate of Cu-Al2O3 Composite in the Spark Sintering Process

Kuramoto Hideaki, Matsugi Kazuhiro, Kawahara Kohsei, Yanagisawa Osamu

doi:10.2320/jinstmet1952.67.10_528

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放電焼結におけるCu-Al2O3複合材料の緻密化速度
放電焼結におけるCu-Al2O3複合材料の緻密化速度
ホウデンショウケツニオケル Cu Al2O3 フクゴウザイリョウノチミツカソクド

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Description

The densification rate of Cu-Al₂O₃ composite was measured and analyzed to investigate the influences of the alumina particles addition on the densification process in the spark sintering process. The consolidation of Cu-10∼50 vol%Al₂O₃ composites proceeds due to the plastic flow of copper powder compact matrix. The effect of the alumina particles on the spark sintering of composites was analyzed based on the following equation, including the increase of relative density of composite compact, D−D₀, that of copper (D_c-c−D₀) and alumina (D_al-al−D₀) and the particle contact probability of “copper-copper” ((1−V_p)²), “copper-alumina”(2V_p(1−V_p)) and “alumina-alumina” (V_p²). (This article is not displayable. Please see full text pdf.) \oindentwhere η is a ratio of the relative density increase at “copper-alumina” particle contacts to that at “copper-copper” particles contacts, and η≤1. Moreover, D, D_c-c and D_al-al are the relative density of composite compact, copper and alumina at a given temperature and pressure, respectively, and V_p is the volume fraction of added alumina particles.

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Journal of the Japan Institute of Metals and Materials

Journal of the Japan Institute of Metals and Materials 67 (10), 528-537, 2003

The Japan Institute of Metals and Materials

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Densification Rate of Cu-Al<SUB>2</SUB>O<SUB>3</SUB> Composite in the Spark Sintering Process