Microstructure and Mechanical Properties of Alumina/Creium Oxide composites
碩士 === 國立成功大學 === 材料科學(工程)學系 === 84 === The microstructure affects the properties of ceramics . In this study , Al2O3 and CeO2 were selected as the matrix and additive , respectively . The effect of atmosphere on microstructure, mechani...
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ndltd-TW-084NCKU01590072016-02-05T04:16:27Z http://ndltd.ncl.edu.tw/handle/41580363089272212548 Microstructure and Mechanical Properties of Alumina/Creium Oxide composites 氧化鋁/氧化鈰複合陶瓷微結構及機械性質之研究 Chen, Sheau-Wen 陳筱文 碩士 國立成功大學 材料科學(工程)學系 84 The microstructure affects the properties of ceramics . In this study , Al2O3 and CeO2 were selected as the matrix and additive , respectively . The effect of atmosphere on microstructure, mechanical properties and annealing of Al2O3/ CeO2 composites was investigated . Results indicated that the Al2O3/CeO2 composites sintered at 1600℃/20min in air contained two phases ofα-Al2O3 and CeO2. However , the phases were α-Al2O3 and CeAl11O18 (β-alumina ) that sintered in N2+5%H2 atmosphere ; The equiaxed CeO2 grain was about 0.4 .mu.m and the length and aspect ratio of CeAl11O18 with elongated grain were 7.5 .mu.m and 7 , respectively . The bending stress and fracture toughness of the specimens sintered at 1600℃in N2+5%H2 were 579 MPa and 5.2 MPa.m1/2, respectively. The major faors influence the mechanical properties were residual stress, fracture mold, elongated grain distribution and relative density for Al2O3/CeO2 composites. After annealing in air, the CeAl11O18 contained in the samples sintered in N2+5%H2 decomposed to Al2O3and CeO2. The rate of decomposition showed a sudden increase at 1300℃and reacted completely at 1500℃for 1h. Chii-Shyang Hwang 黃啟祥 1996 學位論文 ; thesis 90 zh-TW |
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碩士 === 國立成功大學 === 材料科學(工程)學系 === 84 === The microstructure affects the properties of ceramics . In
this study , Al2O3 and CeO2 were selected as the matrix and
additive , respectively . The effect of atmosphere on
microstructure, mechanical properties and annealing of Al2O3/
CeO2 composites was investigated .
Results indicated that the Al2O3/CeO2 composites sintered at
1600℃/20min in air contained two phases ofα-Al2O3 and CeO2.
However , the phases were α-Al2O3 and CeAl11O18 (β-alumina )
that sintered in N2+5%H2 atmosphere ; The equiaxed CeO2 grain
was about 0.4 .mu.m and the length and aspect ratio of CeAl11O18
with elongated grain were 7.5 .mu.m and 7 , respectively . The
bending stress and fracture toughness of the specimens sintered
at 1600℃in N2+5%H2 were 579 MPa and 5.2 MPa.m1/2,
respectively. The major faors influence the mechanical
properties were residual stress, fracture mold, elongated grain
distribution and relative density for Al2O3/CeO2 composites.
After annealing in air, the CeAl11O18 contained in the samples
sintered in N2+5%H2 decomposed to Al2O3and CeO2. The rate of
decomposition showed a sudden increase at 1300℃and reacted
completely at 1500℃for 1h.
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author2 |
Chii-Shyang Hwang |
author_facet |
Chii-Shyang Hwang Chen, Sheau-Wen 陳筱文 |
author |
Chen, Sheau-Wen 陳筱文 |
spellingShingle |
Chen, Sheau-Wen 陳筱文 Microstructure and Mechanical Properties of Alumina/Creium Oxide composites |
author_sort |
Chen, Sheau-Wen |
title |
Microstructure and Mechanical Properties of Alumina/Creium Oxide composites |
title_short |
Microstructure and Mechanical Properties of Alumina/Creium Oxide composites |
title_full |
Microstructure and Mechanical Properties of Alumina/Creium Oxide composites |
title_fullStr |
Microstructure and Mechanical Properties of Alumina/Creium Oxide composites |
title_full_unstemmed |
Microstructure and Mechanical Properties of Alumina/Creium Oxide composites |
title_sort |
microstructure and mechanical properties of alumina/creium oxide composites |
publishDate |
1996 |
url |
http://ndltd.ncl.edu.tw/handle/41580363089272212548 |
work_keys_str_mv |
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