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Mechanical Properties of Submicrometer‐Grained Transparent Yttria Ceramics by Hot Pressing with Hot‐Isostatic Pressing
Author(s) -
Gan Lin,
Park YoungJo,
Kim Haneul,
Kim JinMyung,
Ko JaeWoong,
Lee JaeWook
Publication year - 2016
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12536
Subject(s) - materials science , hot isostatic pressing , yttria stabilized zirconia , ceramic , fracture toughness , hot pressing , grain size , indentation hardness , composite material , pressing , transparent ceramics , metallurgy , sintering , cubic zirconia , microstructure
Here, we report the fabrication and mechanical properties of submicrometer‐grained (0.29–0.58 μm) transparent yttria ceramics by hot pressing combined with hot‐isostatic pressing. The effects of the grain size on the microhardness and the fracture toughness were studied. An unusual decrease of the fracture toughness with an increase in the grain size was revealed, which may be attributed to the different grain size dependence of the fracture behavior of the ZrO 2 ‐doped yttria ceramics compared to that of other yttria ceramics. The microhardness and fracture toughness of the transparent yttria ceramics were found to be better than those of the large‐grained yttria ceramics.