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Effect of Ag on the Hot Corrosion of NiAl Intermetallic Compound
S. N. Liu; W. Su; W. Y. Lv; Z. F. Wei; C. L. Zeng
2013
Source PublicationHigh Temperature Materials and Processes
ISSN0334-6455
Volume32Issue:4Pages:359-365
AbstractThe low ambient tensile ductility and inadequate high temperature strength and creep resistance have limited the applications of intermetallic compound NiAl as a structure material at high temperatures. A small addition of Ag could increase the strength of NiAl. In this study, hot corrosion behavior of NiAl and NiAl-Ag containing 1 and 5% Ag (in weight percent), respectively, in molten (Na, K)(2)SO4 at 1173 K has been examined by thermogravimetry and physical analysis techniques. The experimental results indicated that the corrosion rates of NiAl and NiAl-Ag tended to increase with exposure time, accompanied with the formation of nodules. Fast localized corrosion is the typical feature of the corrosion of both NiAl and NiAl-Ag. The addition of Ag to NiAl accelerated its corrosion, with a higher corrosion rate observed for the 5% Ag addition. The two-phase microstructure of NiAl-Ag alloys accelerated the formation of nodules in the regions close to Ag phases.
description.department[zeng, c. l.] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. [liu, s. n. ; su, w. ; lv, w. y. ; wei, z. f.] guangdong power grid corp, elect power res inst, guangzhou 510080, guangdong, peoples r china. ; zeng, cl (reprint author), chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. ; clzeng@imr.ac.cn
KeywordNial Ag Alloying Hot Corrosion Modified Aluminide Coatings (Na Mechanical-properties k)(2)So4 Superalloy In-738lc Oxidation Behavior Microstructure Resistance Alloys
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Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71377
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
S. N. Liu,W. Su,W. Y. Lv,et al. Effect of Ag on the Hot Corrosion of NiAl Intermetallic Compound[J]. High Temperature Materials and Processes,2013,32(4):359-365.
APA S. N. Liu,W. Su,W. Y. Lv,Z. F. Wei,&C. L. Zeng.(2013).Effect of Ag on the Hot Corrosion of NiAl Intermetallic Compound.High Temperature Materials and Processes,32(4),359-365.
MLA S. N. Liu,et al."Effect of Ag on the Hot Corrosion of NiAl Intermetallic Compound".High Temperature Materials and Processes 32.4(2013):359-365.
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