Effect of ZrO2 on phase transformation of Al2O3

被引：11

作者：

Ipek, M. ^{[1
]}

Zeytin, S. ^{[1
]}

Bindal, C. ^{[1
]}

机构：

[1] Sakarya Univ, Fac Engn, Dept Met & Mat Engn, Sakarya, Turkey

来源：

CERAMICS INTERNATIONAL | 2010年 / 36卷 / 03期

关键词：

Alumina; Alumina-zirconia composite; Phase transformation; Precipitation;

D O I：

10.1016/j.ceramint.2009.12.017

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：

This study investigates the effect of ZrO2 on phase transformation of alumina. Alumina and alumina-zirconia composite powders were produced by the precipitation method from aluminum sulfate and zirconium sulfate precursors. Precipitates obtained at 15 degrees C were dried at 80 degrees C for 72 h, and then calcinated at four different temperatures; 1000 degrees C, 1100 degrees C, 1200 degrees C and 1300 degrees C for 1 h. Powders calcinated at 1300 C were pressed uniaxially and sintered at 1600 degrees C for 1 h. XRD and DSC analyses showed that the presence of zirconia retarded the transformation to alpha-alumina. SEM studies on the powders calcinated at 1300 degrees C revealed that both alumina and alumina zirconia particles were 100-300 nm in size and of near spherical shape. Zirconia additions inhibited abnormal grain growth of alumina and provided homogeneous, equaxied grain structure. (C) 2010 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：1159 / 1163

页数：5

共 7 条

[1]

*AM CER SOC, 1990, AL CHEM SCI TECHN HD

[2]

IPEK M, 2005, THESIS SAKARYA U

[3]

Lee WE., 1994, CERAMIC MICROSTRUCTU

[4] Preparation and mechanical properties of Al2O3-15wt.%ZrO2 composites [J].

Rao, PG ;

Iwasa, M ;

Tanaka, T ;

Kondoh, I ;

Inoue, T .

SCRIPTA MATERIALIA, 2003, 48 (04) :437-441

[5] Preparation and characterization of an Al2O3-ZrO2 nanocomposite, Part I:: Powder synthesis and transformation behavior during fracture [J].

Sarkar, D. ;

Adak, S. ;

Mitra, N. K. .

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, 2007, 38 (01) :124-131

[6] Synthesis and characterization of sol-gel derived ZrO2 doped Al2O3 nanopowder [J].

Sarkar, Debasish ;

Mohapatra, Deepak ;

Ray, Sambarta ;

Bhattacharyya, Santanu ;

Adak, Sukumar ;

Mitra, Niren .

CERAMICS INTERNATIONAL, 2007, 33 (07) :1275-1282

[7] Greatly reduced radiation loss in planar waveguides with two-dimensional conducting interfaces [J].

Sarrafi, P. ;

Zareian, N. ;

Mehrany, K. .

IET OPTOELECTRONICS, 2008, 2 (04) :158-164

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