Starch consolidation of alumina: Fabrication and mechanical properties

被引：30

作者：

Chandradass, J. ^{[1
]}

Kim, Ki Hyeon ^{[1
]}

Bae, Dong Sik ^{[2
]}

Prasad, K. ^{[3
]}

Balachandar, G. ^{[3
]}

Divya, S. Athisaya ^{[3
]}

Balasubramanian, M. ^{[4
]}

机构：

[1] Yeungnam Univ, Dept Phys, Kyongsan 712749, Gyeongsangbuk D, South Korea

[2] Changwon Natl Univ, Sch Nano & Adv Mat Engn, Gyeongnam 641773, South Korea

[3] Anna Univ, Dept Ceram Technol, Madras 600025, Tamil Nadu, India

[4] Indian Inst Technol, Dept Met & Mat Engn, Madras 600036, Tamil Nadu, India

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2009年 / 29卷 / 11期

关键词：

Drying; Sintering; Microstructure; Mechanical properties; Al2O3; GEL-CASTING PROCESS; CERAMICS; GELATION; WAXY;

D O I：

10.1016/j.jeurceramsoc.2009.02.001

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A consolidation technique based on gelling property of starch was used to prepare alumina ceramics. Slurry containing alumina powder, dispersant and small amount of starch (2-3.5 wt.% of powder weight) was cast into a nonporous mould and heated to gelation temperature to produce a rigid green body. A defect free green body was obtained and the total linear shrinkage during drying was 2-3% and the green density observed was 64% of theoretical value. After complete drying, ceramic compacts were sintered without debinding operation. Sintered density of 99.4% was achieved after sintering at 1600 degrees C for 2 h. Flexural strength values of dried and sintered alumina were similar to 10 and 247 MPa, respectively. The sintered ceramics showed an extremely dense microstructure. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：2219 / 2224

页数：6

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