Oxidation of Zr2[Al(Si)]4C5 and Zr3[Al(Si)]4C6 in air

被引：38

作者：

He, L. F. ^{[1
,2
]}

Bao, Y. W. ^{[1
]}

Li, M. S. ^{[1
]}

Wang, J. Y. ^{[1
]}

Zhou, Y. C. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

来源：

JOURNAL OF MATERIALS RESEARCH | 2008年 / 23卷 / 12期

关键词：

D O I：

10.1557/JMR.2008.0411

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The oxidation behavior of Zr-2[Al(Si)](4)C-5 and Zr-3[Al(Si)](4)C-6 in air has been investigated. The oxidation kinetics of bulk Zr-2[Al(Si)](4)C-5 and Zr-3[Al(Si)](4)C-6 at 900-1300 degrees C generally follow a parabolic law at a very short initial stage and then a linear law for a long period with the activation energy of 237.9 and 226.8 kJ/mol, respectively. The oxide scales have a duplex structure, consisting of mainly an outer porous layer of ZrO2, Al2O3, and aluminosilicate/mullite, and a thin inner compact layer of these oxides plus remaining carbon. The oxidation resistance of Zr-2[Al(Si)](4)C-5 and Zr-3[Al(Si)](4)C-6 has been improved compared with Zr2Al3C4, and is much better than Zr-3[Al(Si)](4)C-6 to larger fraction of protective oxidation products, Al2O3 and aluminosilicate/mullite.

引用

页码：3339 / 3346

页数：8

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