Isothermal propagation of martensite in Y2O3-partially stabilized zirconia ceramics.

スポンサーリンク

概要

• 論文の詳細を見る

• The authors have experimentally found that the martensitic transformation propagates isothermally during aging the 2.2 and 5.0 mol%-PSZ ceramics in the temperature range about 423-628 K after being sintered at 1873 K in air. As a result of this experiment, it was suggested that the so-called degradation of Y<SUB>2</SUB>O<SUB>3</SUB>-PSZ ceramics occurring at temperature around 473 K is mainly due to the microcrack propagation induced by the expansion of isothermally produced martensite. To make clear the mechanism of the isothermal propagation of martensite, which is first formed at the specimen surface region and then propagates into the interior, the authors proposed a model which can explain the C-type behaviour of time-temperaturetransformation diagram obtained in this experiment. Since the following three factors, (i) sintering temperature, (ii) circumstance and (iii) the diffusibility of oxygen ions, are thought to have an important effect upon the C-curves, these problems must be experimentally studied hereafter.

• 社団法人 粉体粉末冶金協会の論文

著者

• NAKANISHI N.

  Department of Neurosurgery, Osaka City University Medical School

• Okinaka H.

  Wireless Research Laboratory, Matsushita Electric Industrial Co., LTD.

• Shigematsu T.

  Department of Chemistry, Faculty of Science, Konan University

• Sugimura T.

  Department of Chemistry, Faculty of Science, Konan University

関連論文

• Cranial somitomeres demonstrated first in human embryo in Carnegie stages 7, 10 and 11 : Papers Presented from Platform
• PLASMAPHERESIS IN MULTIPLE ORGAN FAILURE (MOF) : THE JAPANESE EXPERIENCE
• Isothermal propagation of martensite in Y2O3-partially stabilized zirconia ceramics.

スポンサーリンク