Oxidation of Zr_2[Al(Si)]_4C_5 and Zr_3[Al(Si)]_4C_6 in air
Oxidation of Zr_2[Al(Si)]_4C_5 and Zr_3[Al(Si)]_4C_6 in air
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DOI：
10.1557/jmr.2008.0411
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发表时间：
2008-12
影响因子：
2.7
通讯作者：
L. He;Y. Bao;M. Li;J. Wang;Y. C. Zhou
中科院分区：
文献类型：
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作者：
L. He;Y. Bao;M. Li;J. Wang;Y. C. Zhou
The oxidation behavior of Zr_2[Al(Si)]_4C_5 and Zr_3[Al(Si)]_4C_6 in air has been investigated. The oxidation kinetics of bulk Zr_2[Al(Si)]_4C_5 and Zr_3[Al(Si)]_4C_6 at 900–1300 °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 ZrO_2, Al_2O_3, and aluminosilicate/mullite, and a thin inner compact layer of these oxides plus remaining carbon. The oxidation resistance of Zr_2[Al(Si)]_4C_5 and Zr_3[Al(Si)]_4C_6 has been improved compared with Zr_2Al_3C_4, and is much better than ZrC due to larger fraction of protective oxidation products, Al_2O_3 and aluminosilicate/mullite.
