Effect of Ag on the Hot Corrosion of NiAl Intermetallic Compound
The 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...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2013-08-01
|
| Series: | High Temperature Materials and Processes |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/htmp-2012-0150 |
| _version_ | 1818726745271959552 |
|---|---|
| author | Liu S.N. Su W. Lv W.Y. Wei Z.F. Zeng C.L. |
| author_facet | Liu S.N. Su W. Lv W.Y. Wei Z.F. Zeng C.L. |
| author_sort | Liu S.N. |
| collection | DOAJ |
| description | The 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)2SO4 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. |
| first_indexed | 2024-12-17T22:03:05Z |
| format | Article |
| id | doaj.art-2489f3bb2a474b1aaca6c4511b397f77 |
| institution | Directory Open Access Journal |
| issn | 0334-6455 2191-0324 |
| language | English |
| last_indexed | 2024-12-17T22:03:05Z |
| publishDate | 2013-08-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | High Temperature Materials and Processes |
| spelling | doaj.art-2489f3bb2a474b1aaca6c4511b397f772022-12-21T21:30:55ZengDe GruyterHigh Temperature Materials and Processes0334-64552191-03242013-08-0132435936510.1515/htmp-2012-0150Effect of Ag on the Hot Corrosion of NiAl Intermetallic CompoundLiu S.N.0Su W.1Lv W.Y.2Wei Z.F.3Zeng C.L.4Electric Power Research Institute of Guangdong Power Grid Corporation, Guangzhou 510080, ChinaElectric Power Research Institute of Guangdong Power Grid Corporation, Guangzhou 510080, ChinaElectric Power Research Institute of Guangdong Power Grid Corporation, Guangzhou 510080, ChinaElectric Power Research Institute of Guangdong Power Grid Corporation, Guangzhou 510080, ChinaState Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Science, Shenyang 110016, ChinaThe 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)2SO4 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.https://doi.org/10.1515/htmp-2012-0150nialag alloyinghot corrosion(na,k)2so4 |
| spellingShingle | Liu S.N. Su W. Lv W.Y. Wei Z.F. Zeng C.L. Effect of Ag on the Hot Corrosion of NiAl Intermetallic Compound High Temperature Materials and Processes nial ag alloying hot corrosion (na,k)2so4 |
| title | Effect of Ag on the Hot Corrosion of NiAl Intermetallic Compound |
| title_full | Effect of Ag on the Hot Corrosion of NiAl Intermetallic Compound |
| title_fullStr | Effect of Ag on the Hot Corrosion of NiAl Intermetallic Compound |
| title_full_unstemmed | Effect of Ag on the Hot Corrosion of NiAl Intermetallic Compound |
| title_short | Effect of Ag on the Hot Corrosion of NiAl Intermetallic Compound |
| title_sort | effect of ag on the hot corrosion of nial intermetallic compound |
| topic | nial ag alloying hot corrosion (na,k)2so4 |
| url | https://doi.org/10.1515/htmp-2012-0150 |
| work_keys_str_mv | AT liusn effectofagonthehotcorrosionofnialintermetalliccompound AT suw effectofagonthehotcorrosionofnialintermetalliccompound AT lvwy effectofagonthehotcorrosionofnialintermetalliccompound AT weizf effectofagonthehotcorrosionofnialintermetalliccompound AT zengcl effectofagonthehotcorrosionofnialintermetalliccompound |