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Non-isothermal and isothermal oxidation behaviors of AlON translucent ceramic in air
J. Q.; Xie Qi, X. M.; Wang, Y.; Wang, J.; Xiao, L.; Wei, N.; Wu, D.; Lu, T. C.
2015
Source PublicationMaterials and Corrosion-Werkstoffe Und Korrosion
ISSN0947-5117
Volume66Issue:4Pages:328-333
AbstractThe oxidation behavior of AlON translucent ceramic was investigated both in non-isothermal (from room temperature to 1573 K) and isothermal (at 1373 and 1473 K) conditions. The mass gains, phase compositions and micromorphology of oxidized samples were examined by thermogravimetric analysis (TGA), X-ray diffraction (XRD), and scanning electron microscopy (SEM), respectively. The results suggest that in non-isothermal environment the oxidation reaction starts at about 1173 K for both AlON bulk sample and powder. In isothermal condition, the mass gain indicates the two-stage reaction mechanism which starts with chemical reaction, followed by diffusion controlled stage. XRD patterns suggest that AlON is thermodynamically unstable and it partly decomposes into corundum phase Al2O3 and AlN during the oxidation process. SEM results indicate that different micromorphology is obtained at different temperatures in the oxidation process. The estimated apparent activation energy for the diffusion rate controlled stage from isothermal experiment is about 245.2 kJ/mol.
description.department[qi, j. q. ; xie, x. m. ; wang, y. ; xiao, l. ; wei, n. ; lu, t. c.] sichuan univ, coll phys sci & engn, chengdu 610064, sichuan, peoples r china. [qi, j. q. ; wang, y. ; xiao, l. ; lu, t. c.] sichuan univ, minist educ, key lab radiat phys & technol, chengdu 610064, sichuan, peoples r china. [xie, x. m.] sichuan univ, minist educ, key lab high energy dens phys, chengdu 610064, sichuan, peoples r china. [wang, j.] sichuan univ sci & engn, sch sci, zigong 643000, sichuan, peoples r china. [wu, d.] univ calif davis, peter a rock thermochem lab, davis, ca 95616 usa. [wu, d.] univ calif davis, neat oru, davis, ca 95616 usa. [lu, t. c.] chinese acad sci, int ctr mat phys, shenyang 110015, liaoning, peoples r china. ; qi, jq (reprint author), sichuan univ, coll phys sci & engn, chengdu 610064, sichuan, peoples r china. ; qijianqi@scu.edu.cn ; lutiecheng@scu.edu.cn
KeywordAluminum Oxynitride Phase-relations Thermodynamics
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/73898
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
J. Q.,Xie Qi, X. M.,Wang, Y.,et al. Non-isothermal and isothermal oxidation behaviors of AlON translucent ceramic in air[J]. Materials and Corrosion-Werkstoffe Und Korrosion,2015,66(4):328-333.
APA J. Q..,Xie Qi, X. M..,Wang, Y..,Wang, J..,Xiao, L..,...&Lu, T. C..(2015).Non-isothermal and isothermal oxidation behaviors of AlON translucent ceramic in air.Materials and Corrosion-Werkstoffe Und Korrosion,66(4),328-333.
MLA J. Q.,et al."Non-isothermal and isothermal oxidation behaviors of AlON translucent ceramic in air".Materials and Corrosion-Werkstoffe Und Korrosion 66.4(2015):328-333.
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