Fabrication of highly dense Al2O3 ceramics

被引：39

作者：

Bai, Jianguang ^{[1
]}

Yang, Xinghua ^{[1
]}

Xu, Shaochun ^{[1
]}

Shi, Yonggui ^{[1
]}

Yang, Jianfeng ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

来源：

SCRIPTA MATERIALIA | 2013年 / 68卷 / 06期

关键词：

Dense Al2O3 ceramics; HTPVT; Bulk density; Flexural strength; KINETICS; GROWTH;

D O I：

10.1016/j.scriptamat.2012.10.054

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A novel method using a high-temperature physical vapor transport method for the preparation of highly dense Al2O3 ceramics was developed. The results show that the microstructure of the dense Al2O3 ceramics showed directional distribution characteristics due to directional mass transfer. X-ray diffraction revealed the observed phases to be alpha-Al2O3. The dense Al2O3 ceramics had a bulk density of 3.95 g cm(-3), a flexural strength of 510 +/- 20 MPa and a Vickers hardness of 18.2 GPa. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：393 / 395

页数：3

共 9 条

[1]

[Anonymous], 1984, ALUMINA PROCESSING P

[2] Fabrication of directional SiC porous ceramics using Fe2O3 as pore-forming agent [J].

Bai, Jianguang ;

Yang, Xinghua ;

Shi, Yonggui ;

Xu, Shaochun ;

Yang, Jianfeng .

MATERIALS LETTERS, 2012, 78 :192-194

[3] Kinetics and modeling of sublimation growth of silicon carbide bulk crystal [J].

Chen, QS ;

Zhang, H ;

Prasad, V ;

Balkas, CM ;

Yushin, NK ;

Wang, S .

JOURNAL OF CRYSTAL GROWTH, 2001, 224 (1-2) :101-110

[4] Fabrication of highly dense pure SiC ceramics via the HTPVT method [J].

Dai, Pei Yun ;

Wang, Yan Zhong ;

Liu, Guang Liang ;

Wang, Bo ;

Shi, Yong Gui ;

Yang, Jian Feng ;

Qiao, Guan Jun ;

Wang, Hong Jie .

ACTA MATERIALIA, 2011, 59 (16) :6257-6263

[5]

Hilkat E., 1995, CERAM I, V21, P345

[6] GROWTH-KINETICS OF VAPOR-GROWN SIC [J].

KANEKO, T .

JOURNAL OF CRYSTAL GROWTH, 1993, 128 (1-4) :354-357

[7] KINETIC-ANALYSIS OF SOLUTION-PRECIPITATION DURING LIQUID-PHASE SINTERING OF ALUMINA [J].

KWON, OH ;

MESSING, GL .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1990, 73 (02) :275-281

[8]

Mehmet A., 1999, J AM CERAM SOC, V82, P1849

[9] Influence of MnO and TiO2 additives on density, microstructure and mechanical properties of Al2O3 [J].

Sathiyakumar, M ;

Gnanam, FD .

CERAMICS INTERNATIONAL, 2002, 28 (02) :195-200

← 1 →