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Title: Stress-induced phase transformation of ZrO{sub 2} in ZrO{sub 2} (3mol%Y{sub 2}O{sub 3})-25vol%Al{sub 2}O{sub 3} composite studied by transmission electron microscopy

Abstract

To improve mechanical properties, fracture toughness in particular, ZrO{sub 2} ceramic has been widely used not only as a matrix, but also as a toughening agent. Among them, recently, the ZrO{sub 2}-Al{sub 2}O{sub 3} system has received much attention because of the applications to wear and tool materials in the Al{sub 2}O{sub 3}-rich part and superplastic deformation behavior at the high temperature in the ZrO{sub 2}-rich part. Furthermore, recent availability of high pure and fine-grained ZrO{sub 2} and Al{sub 2}O{sub 3} powders makes it possible to synthesize the composites with submicron size grains by pressureless-sintering at the comparatively low temperature of 1,450 C. The purpose of the present work is to investigate the stress-induced t-m phase transformation of ZrO{sub 2} in the ZrO{sub 2}(3mol%Y{sub 2}O{sub 3})-25vol%Al{sub 2}O{sub 3} bulk composite made by the use of micro-indentation. In addition, the fracture characteristic was studied by the observation of fracture surface made by 3-point bending test.

Authors:
 [1];  [2];  [3]
  1. Kongju National Univ. (Korea, Republic of). Dept. of Materials Engineering
  2. Chungnam National Univ., Taejon (Korea, Republic of). Dept. of Metallurgical Engineering
  3. Tohoku Univ., Sendai (Japan). Inst. for Materials Research
Publication Date:
OSTI Identifier:
619463
Resource Type:
Journal Article
Journal Name:
Scripta Materialia
Additional Journal Information:
Journal Volume: 38; Journal Issue: 7; Other Information: PBD: 3 Mar 1998
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ZIRCONIUM OXIDES; ALUMINIUM OXIDES; CRYSTAL-PHASE TRANSFORMATIONS; FRACTURE PROPERTIES; COMPOSITE MATERIALS; YTTRIUM OXIDES

Citation Formats

Lee, B T, Lee, K H, and Hiraga, Kenji. Stress-induced phase transformation of ZrO{sub 2} in ZrO{sub 2} (3mol%Y{sub 2}O{sub 3})-25vol%Al{sub 2}O{sub 3} composite studied by transmission electron microscopy. United States: N. p., 1998. Web. doi:10.1016/S1359-6462(98)00003-7.
Lee, B T, Lee, K H, & Hiraga, Kenji. Stress-induced phase transformation of ZrO{sub 2} in ZrO{sub 2} (3mol%Y{sub 2}O{sub 3})-25vol%Al{sub 2}O{sub 3} composite studied by transmission electron microscopy. United States. https://doi.org/10.1016/S1359-6462(98)00003-7
Lee, B T, Lee, K H, and Hiraga, Kenji. 1998. "Stress-induced phase transformation of ZrO{sub 2} in ZrO{sub 2} (3mol%Y{sub 2}O{sub 3})-25vol%Al{sub 2}O{sub 3} composite studied by transmission electron microscopy". United States. https://doi.org/10.1016/S1359-6462(98)00003-7.
@article{osti_619463,
title = {Stress-induced phase transformation of ZrO{sub 2} in ZrO{sub 2} (3mol%Y{sub 2}O{sub 3})-25vol%Al{sub 2}O{sub 3} composite studied by transmission electron microscopy},
author = {Lee, B T and Lee, K H and Hiraga, Kenji},
abstractNote = {To improve mechanical properties, fracture toughness in particular, ZrO{sub 2} ceramic has been widely used not only as a matrix, but also as a toughening agent. Among them, recently, the ZrO{sub 2}-Al{sub 2}O{sub 3} system has received much attention because of the applications to wear and tool materials in the Al{sub 2}O{sub 3}-rich part and superplastic deformation behavior at the high temperature in the ZrO{sub 2}-rich part. Furthermore, recent availability of high pure and fine-grained ZrO{sub 2} and Al{sub 2}O{sub 3} powders makes it possible to synthesize the composites with submicron size grains by pressureless-sintering at the comparatively low temperature of 1,450 C. The purpose of the present work is to investigate the stress-induced t-m phase transformation of ZrO{sub 2} in the ZrO{sub 2}(3mol%Y{sub 2}O{sub 3})-25vol%Al{sub 2}O{sub 3} bulk composite made by the use of micro-indentation. In addition, the fracture characteristic was studied by the observation of fracture surface made by 3-point bending test.},
doi = {10.1016/S1359-6462(98)00003-7},
url = {https://www.osti.gov/biblio/619463}, journal = {Scripta Materialia},
number = 7,
volume = 38,
place = {United States},
year = {1998},
month = {3}
}