2012•Kikai Zairyou, Zairyou Kakou Gijutsu Kouenkai kouen rombunshuu/Kikai Zairyo, Zairyo Kako Gijutsu Koenkai koen ronbunshuOpen access
223 Mechanical properties and microstructure of alumina ceramics produced by spark plasma sintering
Takuya YASUNO, Masakazu Kawahara, Yukio Makino, Yasuo Kogo
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Abstract
An ultrafine α-alumina powder was consolidated by spark plasma sintering (SPS) and the effect of microstructure on mechanical properies of the sintered compact was examined. In the sintering temperature at 1473K, the sintering was incomplete at the central part, and the periphery was fine microstructure. On the other hand, in the sintering temperature at 1773 K, many fine pores observed in the grains and/or on the grain boundaries. Further, the martens hardness indicated a low value at the central part.
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