Shrinkage of large isolated pores during hot isostatic pressing of presintered alumina ceramics

Journal Article · Fri Sep 01 00:00:00 EDT 1995 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1995.tb08697.x· OSTI ID:116106

Oh, K S; Kim, D Y ^[1]; Cho, S J ^[2]

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1. Seoul National Univ. (Korea, Republic of). Dept. of Inorganic Materials Engineering
2. Korea Research Inst. of Standards and Science, Taejon (Korea, Republic of)

The shrinkage process of large pores during hot isostatic pressing (HIP) of presintered Al{sub 2}O{sub 3} and Al{sub 2}O{sub 3}-ZrO{sub 2} ceramics has been investigated. Large pores were observed to collapse by grain-boundary sliding, and then small pores resulting from the misfit of flowed grains disappeared, mainly by diffusion. Due to the high resistance to grain-boundary sliding, the pores in the Al{sub 2}O{sub 3}-ZrO{sub 2} ceramics were hard to eliminate.

• Sponsoring Organization: USDOE
• OSTI ID: 116106
• Journal Information: Journal of the American Ceramic Society, Vol. 78, Issue 9; Other Information: DN: Presented at 96. annual meeting of the American Ceramic Society, Indianapolis, IN (US), April 27, 1994; PBD: Sep 1995
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
HOT PRESSING
ZIRCONIUM OXIDES
ORGANOMETALLIC COMPOUNDS
GRAIN SIZE
POROSITY
SINTERING
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
GRAIN BOUNDARIES
DIFFUSION
SCANNING ELECTRON MICROSCOPY
GRAIN GROWTH