Phase compositions and depth-profiling of calcium aluminates in a functionally-graded alumina/calcium-hexaluminate composite

被引：11

作者：

Asmi, D ^{[1
]}

Low, IM ^{[1
]}

O'Connor, BH ^{[1
]}

Buckley, C ^{[1
]}

机构：

[1] Curtin Univ Technol, Mat Res Grp, Dept Appl Phys, Perth, WA 6845, Australia

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2001年 / 118卷 / 1-3期

关键词：

phase composition; calcium aluminates; functionally-graded;

D O I：

10.1016/S0924-0136(01)00963-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The phase developments, abundances and depth-profiling of various calcium aluminates (i.e. CA, CA(2) and CA(6)) in a functionally-graded alumina/calcium-hexaluminate material (FGM) at temperatures ranging 1000-1650 degreesC have been systematically analysed by X-ray diffraction (XRD) and synchrotron radiation diffraction (SRD). Results show that CA and CA(2) formed at approximately 1000 and 1300 degreesC, respectively, remained stable even at 1400 degreesC, but eventually transformed fully to CA(6) at 1650 degreesC. XRD of the FGM shows the presence of corundum in the alumina layer and a mixture of CA(6) and corundum in the graded region. Qualitative depth-profiles of phase contents within the FGM show that the abundance of CA(6) in the graded layer decreased gradually with increasing depths towards the alumina layer. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：219 / 224

页数：6

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