常圧焼結により作製されたジルコニア強化アルミナ焼結体の物理特性と研削性状 Physical Properties and Grindarbilities of Zirconia Toughened Alumina Ceramics by Normal Sintering
Several kinds of zirconia toughened alumina ceramics (ZTA ceramics) with the different amount of monoclinic zirconia were produced by a slip casting and a normal sintering using fine powders. Grinding force was adopted as a criterion of grindarbility, and fracture toughness, bending strength and tetragonal zirconia contents were also measured as properties related to toughened mechanisms. The results are summarized as follows:<BR>1) ZTA ceramics with the addition 10vol% of monoclinic zirconia indicated the maximum fracture toughness and tetragonal zirconia content.<BR>2) The grinding force was the maximum value at the addition 10vol% of monoclinic zirconia. The grindarbility of ZTA ceramics was dominated by fracture toughness.<BR>3) The toughened mechanism of ZTA ceramics in this study was closely connected with tetragonal zirconia contents.
粉体および粉末冶金 45(11), 1013-1017, 1998-11-15
Japan Society of Powder and Powder Metallurgy