| Structural relaxation and its influence on the elastic properties and notch toughness of Mg-Zn-Ca bulk metallic glass |
| Y. Y. Zhao; X. Zhao
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| 2012
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| 发表期刊 | Journal of Alloys and Compounds
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| ISSN | 0925-8388
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| 卷号 | 515页码:154-160 |
| 摘要 | Structural relaxation and its influence on the elastic properties and mechanical properties of Mg-Zn-Ca bulk metallic glass (BMG) were investigated. It was found that relaxation can occur spontaneously even at room temperature (T-R) because of the high homologous temperature (T-R/T-g > 0.7) of the BMG. A linear dependence between enthalpy change (Delta H-t) and free volume change (Delta v(f)) for the annealed Mg66Zn30Ca4 BMG over a wide temperature range was discovered. The structural relaxation of the Mg66Zn30Ca4 BMG resulted in increased shear modulus mu (3.4%) and decreased Poisson's ratio nu (1.4%). However, the tested BMG samples exhibited no obvious degradation of notch toughness (K-Q) even after full structural relaxation. The K-Q values are 9.0 +/- 1.7 MPam(1/2) and 7.1 +/- 1.8 MPam(1/2) for the freshly prepared samples (annealed at T-R for 1.5 h) and fully relaxed samples (annealed at 373 K for 4 h), respectively. These results indicate that the mechanical properties of the Mg66Zn30Ca4 BMG are not very sensitive to its structural relaxation over a wide temperature and time range. These findings may facilitate the clinical applications of Mg66Zn30Ca4 BMG as a promising implant material for future clinical applications. (C) 2011 Elsevier B. V. All rights reserved. |
| 部门归属 | [zhao, yuan-yun; zhao, xu] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [zhao, yuan-yun] chinese acad sci, zhejiang prov key lab magnet mat & applicat techn, key lab magnet mat & devices, ningbo inst mat technol & engn, ningbo 315201, zhejiang, peoples r china.;zhao, yy (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china.;zhaoyy@nimte.ac.cn
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| 关键词 | Mg-based Metallic Glass
Biodegradable Materials
Structural Relaxation
Elastic Properties
Notch Toughness
In-vivo Corrosion
Room-temperature Embrittlement
Magnesium Alloys
Mechanical-properties
Fracture-toughness
Bone
Transition
Strength
Implants
Behavior
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| URL | 查看原文
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.imr.ac.cn/handle/321006/60495
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| 专题 | 中国科学院金属研究所
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推荐引用方式
GB/T 7714 |
Y. Y. Zhao,X. Zhao. Structural relaxation and its influence on the elastic properties and notch toughness of Mg-Zn-Ca bulk metallic glass[J]. Journal of Alloys and Compounds,2012,515:154-160.
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| APA |
Y. Y. Zhao,&X. Zhao.(2012).Structural relaxation and its influence on the elastic properties and notch toughness of Mg-Zn-Ca bulk metallic glass.Journal of Alloys and Compounds,515,154-160.
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| MLA |
Y. Y. Zhao,et al."Structural relaxation and its influence on the elastic properties and notch toughness of Mg-Zn-Ca bulk metallic glass".Journal of Alloys and Compounds 515(2012):154-160.
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