| Positron lifetime study of the single-phase B2Ni(100-x)Al(x) and Ni50-xCOxAl50 intermetallics | |
| R. S. Chen; J. T. Guo; W. L. Zhou; L. Y. Xiong | |
| 2000 | |
| Source Publication | Journal of Materials Science & Technology
 |
| ISSN | 1005-0302 |
| Volume | 16Issue:4Pages:379-382 |
| Abstract | In order to understand the point defect structure in NiAl Intermetallic compound, the positron lifetime in binary Ni100-xAlx (53 greater than or equal to x greater than or equal to 45) and ternary B2 Ni50-xCoxAl50 (x=0, 5, 10, 15) intermetallic compounds as a function of composition were measured. It is shown that the positron lifetime spectra of these compounds can be consistently expressed by single-component lifetimes. The positron lifetime value in ternary Ni50-xCoxAl50 alloy is independent of Co content and equal to that detected in both stoichiometric and Al-rich NiAl. From an analysis of the present results, it is suggested that the constant lifetime of tau approximate to 180 ps should be ascribed to saturation trapping and annihilation of positron exclusively at Ni vacancy, no evidence for the presence of Al vacancy is available. |
| description.department | chinese acad sci, inst met res, dept superalloys, shenyang 110015, peoples r china. chinese acad sci, inst met res, int ctr mat phys, shenyang 110015, peoples r china. chinese acad sci, inst met res, liaoning key lab mat & hydrogen, shenyang 110015, peoples r china.;guo, jt (reprint author), chinese acad sci, inst met res, dept superalloys, shenyang 110015, peoples r china |
| Keyword | Defect Structure Vacancies Ni3al |
| URL | 查看原文 |
| WOS ID | WOS:000088372100006 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/36997 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | R. S. Chen,J. T. Guo,W. L. Zhou,et al. Positron lifetime study of the single-phase B2Ni(100-x)Al(x) and Ni50-xCOxAl50 intermetallics[J]. Journal of Materials Science & Technology,2000,16(4):379-382. |
| APA | R. S. Chen,J. T. Guo,W. L. Zhou,&L. Y. Xiong.(2000).Positron lifetime study of the single-phase B2Ni(100-x)Al(x) and Ni50-xCOxAl50 intermetallics.Journal of Materials Science & Technology,16(4),379-382. |
| MLA | R. S. Chen,et al."Positron lifetime study of the single-phase B2Ni(100-x)Al(x) and Ni50-xCOxAl50 intermetallics".Journal of Materials Science & Technology 16.4(2000):379-382. |
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