Effect of CIP on the strength of ceramics produced from ZrO sub 2 + 3 mol.% Y sub 2 O sub 3 powder

It is shown that the strength of ceramics from zirconia partially stabilized with yttria (PSZ) is determined substantially by the nature of the surface or subsurface defects. The kind of defects is connected with the fullness of formation of grain boundaries. It is shown that growth of the CIP press...

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Published inRefractories and industrial ceramics Vol. 40; no. 9-10; pp. 448 - 451
Main Authors Akimov, G Y, Timchenko, V M, Vasil'ev, A D, Chaika, E V, Samelyuk, A V
Format Journal Article
LanguageEnglish
Published 01.05.2000
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Summary:It is shown that the strength of ceramics from zirconia partially stabilized with yttria (PSZ) is determined substantially by the nature of the surface or subsurface defects. The kind of defects is connected with the fullness of formation of grain boundaries. It is shown that growth of the CIP pressure causes a change in the nature of the defect responsible for fracture, which in turn causes substantial hardening of the ceramics. When PSZ powder is pressed at 0.4 GPa the resulting ceramics has an ultimate bending strength of 1700 MPa. As a rule ceramics with such a strength are obtained only with the use of hot isostatic pressure.
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ISSN:1083-4877