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Thermo-mechanical stability of porous alumina: effect of sintering parameters

Content Provider	Taylor & Francis Online
Author	Ueno, S. Kanzaki, S. Jayaseelan, D. Doni Ohji, T.
Abstract	Recently, we proposed a two-step heating schedule involving pulse electric current sintering (PECS), a kind of pressure assisted vacuum sintering, and subsequent post-heat treatment in air to fabricate porous alumina support, using commercially available alumina and carbon powders [J. Mater. Res. 18 (2003) 751]. During pressure assisted vacuum sintering, Al2O3–C system of low porosity was obtained and in second stage, i.e. during post-heat treatment in air, carbon particles present in the Al2O3–C system burnt out to form highly porous Al2O3 support. Following our previous brief study, the effects of sintering parameters such as temperature, pressure, and heating rate on the properties of the porous alumina were investigated. The porosity varied between 28 and 38% depending on the sintering parameters. As desired, the pore size distribution did not change with post-heat treatment temperature and hence the mechanical properties as well. It was concurred from this present study that the sintering parameters of PECS greatly influenced pore characteristics and other properties of porous compacts. We admit that the initial composition ratio of powder mixture (Al2O3:C) also plays important role on properties such as porosity, pore size, etc. which is beyond the scope of this present study.
Starting Page	387
Ending Page	392
Page Count	6
File Format	PDF HTM / HTML
ISSN	14686996 18785514
DOI	10.1016/j.stam.2004.01.010
Journal	Science and Technology of Advanced Materials
Volume Number	5
Issue Number	4
Language	English
Publisher	Taylor & Francis
Publisher Date	2004-03-19
Access Restriction	Open
Subject Keyword	Porous alumina Vacuum sintering High strength Thermal stability Microstructure
Content Type	Text
Resource Type	Article
Subject	Materials Science

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