| Effects of Dy on cyclic oxidation resistance of NiAl alloy | |
| Alternative Title | Effects of Dy on cyclic oxidation resistance of NiAl alloy |
| Guo Hongbo1; Wang Xiaoyan1; Li Ji3; Wang Shixing1; Gong Shengkai1 | |
| 2009 | |
| Source Publication | TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
 |
| ISSN | 1003-6326 |
| Volume | 19Issue:5Pages:1185-1189 |
| Abstract | The NiAl alloys modified by reactive element(R-E), dysprosium(Dy), were produced by arc melting. The microstructures of the modified alloys were investigated by field emission-scanning electron microscope(FE-SEM) equipped with energy dispersive spectroscope(EDS) and back scatter detector. Cyclic oxidation tests at 1 200 degrees C were conducted to assess the cyclic oxidation performance of the alloys. The Dy dopant prevents the surface rumpling of the oxide scale and the formation of cavities beneath the oxide scale. The pegs consisting of Dy-rich oxide inclusion core and an outer alumina sheath develop deeply in the alloy and improve the oxide scale adhesion. 0.05%-0.1% (molar fraction) Dy dramatically improves the cyclic oxidation resistance of the NiAl alloy. Too high concentration of Dy is deleterious because of the fast oxidation rate caused by severe internal oxidation. |
| Other Abstract | The NiAl alloys modified by reactive element(RE), dysprosium(Dy), were produced by arc melting. The microstructures of the modified alloys were investigated by field emission-scanning electron microscope(FE-SEM) equipped with energy dispersive spectroscope(EDS) and back scatter detector. Cyclic oxidation tests at 1 200 ℃ were conducted to assess the cyclic oxidation performance of the alloys. The Dy dopant prevents the surface rumpling of the oxide scale and the formation of cavities beneath the oxide scale. The pegs consisting of Dy-rich oxide inclusion core and an outer alumina sheath develop deeply in the alloy and improve the oxide scale adhesion. 0.05%-0.1% (molar fraction) Dy dramatically improves the cyclic oxidation resistance of the NiAl alloy. Too high concentration of Dy is deleterious because of the fast oxidation rate caused by severe internal oxidation. |
| Keyword | THERMAL BARRIER COATINGS HIGH-TEMPERATURE SCALE ADHESION GROWN OXIDE BOND COAT BEHAVIOR SULFUR PERFORMANCE HAFNIUM NiAl reactive element dysprosium(Dy) oxidation adhesion |
| Indexed By | CSCD |
| Language | 英语 |
| Funding Project | [National Natural Science Foundation of China] ; [Program for Changjiang Scholars and Innovative Research Team in Chinese University] |
| CSCD ID | CSCD:3712107 |
| Citation statistics |
Cited Times:7[CSCD]
[CSCD Record]
|
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/150609 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 1.Beijing Univ Aeronaut & Astronaut, Dept Materials Sci & Engn, Beijing 100083, Peoples R China 2.Beijing Univ Aeronaut & Astronaut, Beijing Key Lab Adv Funct Materials & Thin Film Technol, Beijing 100083, Peoples R China 3.中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | Guo Hongbo,Wang Xiaoyan,Li Ji,et al. Effects of Dy on cyclic oxidation resistance of NiAl alloy[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2009,19(5):1185-1189. |
| APA | Guo Hongbo,Wang Xiaoyan,Li Ji,Wang Shixing,&Gong Shengkai.(2009).Effects of Dy on cyclic oxidation resistance of NiAl alloy.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,19(5),1185-1189. |
| MLA | Guo Hongbo,et al."Effects of Dy on cyclic oxidation resistance of NiAl alloy".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 19.5(2009):1185-1189. |
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