Influence of Pre-oxidation on the Hot Corrosion of DZ68 Superalloy in the Mixture of Na(2)SO(4)-NaCl

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	Influence of Pre-oxidation on the Hot Corrosion of DZ68 Superalloy in the Mixture of Na(2)SO(4)-NaCl
	E. Z. Liu; Z. Zheng; X. R. Guan; J. A. Tong; L. K. Ning; Y. S. Yu
	2010
发表期刊	Journal of Materials Science & Technology
ISSN	1005-0302
卷号	26 期号:10 页码:895-899
摘要	DZ68 alloy is a new Ni-base directionally solidified superalloy for the blade of advanced turbine engine with high ratio of thrust-mass In order to investigate the influence of pre-oxidation on the hot corrosion resistance of DZ68 alloy pre-oxidation treatment was conducted at 950 degrees C in air for 20 h A mixture of 75% Na(2)SO(4)+25% NaCl (in mass fraction) was used for hot corrosion study at 900 degrees C The microstructure of specimens was investigated by using a scanning electron microscope (SEM) equipped with an energy dispersive spectroscopy (EDS) The compositions of the corroded specimens were determined by X-ray diffraction (XRD) After pre-oxidation at 950 degrees C in air for 20 h a protective scale consisting of Cr(2)O(3) Al(2)O(3) NiO NiCr(2)O(4) and Ni(2)Ti(4)O formed on the DZ68 superalloy surface The pre-oxidation treatment improved the initial incubation stage of the alloy in the mixture of 75% Na(2)SO(4)+25% NaCl melts at 900 degrees C The oxide layer degraded gradually with increasing the time of hot corrosion Once the oxide layer was damaged the corrosion rate would increase rapidly accompanied by obvious spoliation of the corrosion products At 900 degrees C the pre-oxidation treatment could not inhibit the accelerated hot corrosion of DZ68 in the mixture of 75% Na(2)SO(4)+25% NaCl melts with a high corrosion rate
部门归属	[liu, enze; zheng, zhi; guan, xiurong; tong, jian; ning, likui; yu, yongsi] chinese acad sci, inst met res, shenyang 110016, peoples r china.;liu, ez (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china
关键词	Dz68 Superalloy Pre-oxidation Hot Corrosion Ni-based Superalloy Resistance Behavior
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31274
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	E. Z. Liu,Z. Zheng,X. R. Guan,et al. Influence of Pre-oxidation on the Hot Corrosion of DZ68 Superalloy in the Mixture of Na(2)SO(4)-NaCl[J]. Journal of Materials Science & Technology,2010,26(10):895-899.
APA	E. Z. Liu,Z. Zheng,X. R. Guan,J. A. Tong,L. K. Ning,&Y. S. Yu.(2010).Influence of Pre-oxidation on the Hot Corrosion of DZ68 Superalloy in the Mixture of Na(2)SO(4)-NaCl.Journal of Materials Science & Technology,26(10),895-899.
MLA	E. Z. Liu,et al."Influence of Pre-oxidation on the Hot Corrosion of DZ68 Superalloy in the Mixture of Na(2)SO(4)-NaCl".Journal of Materials Science & Technology 26.10(2010):895-899.