Isothermal oxidation behavior of Ti(3)Al-based alloy at 700-1000 degrees C in air

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	Isothermal oxidation behavior of Ti(3)Al-based alloy at 700-1000 degrees C in air
	Y. H. Qian; M. S. Li; B. Lu
	2009
发表期刊	Transactions of Nonferrous Metals Society of China
ISSN	1003-6326
卷号	19 期号:3 页码:525-529
摘要	The isothermal oxidation behavior of a Ti(3)Al-based alloy (Ti-24Al-14Nb-3V-0.5Mo-0.3Si, molar fraction, %) at 700-1000 degrees C in air was investigated. The oxidation kinetics of tested alloy approximately obeys the parabolic law, which shows that the oxidation process is dominated by the diffusion of ions. The oxidation diffusion activity energy is 241.32 kJ/mol. The tested alloy exhibits good oxidation resistance at 700 degrees C. However, when the temperature is higher than 900 degrees C, the oxidation resistance becomes poor. The XRD results reveal that the oxide product consists of a mixture of TiO(2) and Al(2)O(3). Serious crack and spallation of oxide scale occur during cooling procedure after being exposed at 1000 degrees C in air for 16 h. According to the analysis of SEM/EDS and XRD, it is concluded that the Al(2)O(3) oxide forms at the initially transient oxidation stage and most of it keeps in the outer oxide layer during the subsequent oxidation procedure.
部门归属	[qian yu-hai] baoshan iron & steel co ltd, r&d ctr, shanghai 201900, peoples r china. [qian yu-hai; li mei-shuan; lu bin] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;qian, yh (reprint author), baoshan iron & steel co ltd, r&d ctr, shanghai 201900, peoples r china;yhqian@baosteel.com
关键词	Oxidation Resistance Ti(3)Al-based Intermetallic Alloy Oxidation Kinetics Resistance Coatings Ti3al-nb Ti
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32238
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. H. Qian,M. S. Li,B. Lu. Isothermal oxidation behavior of Ti(3)Al-based alloy at 700-1000 degrees C in air[J]. Transactions of Nonferrous Metals Society of China,2009,19(3):525-529.
APA	Y. H. Qian,M. S. Li,&B. Lu.(2009).Isothermal oxidation behavior of Ti(3)Al-based alloy at 700-1000 degrees C in air.Transactions of Nonferrous Metals Society of China,19(3),525-529.
MLA	Y. H. Qian,et al."Isothermal oxidation behavior of Ti(3)Al-based alloy at 700-1000 degrees C in air".Transactions of Nonferrous Metals Society of China 19.3(2009):525-529.