Structural relaxation and its influence on the elastic properties and notch toughness of Mg-Zn-Ca bulk metallic glass
文献类型：期刊论文
| 作者 | Y. Y. Zhao ; X. Zhao |
| 刊名 | Journal of Alloys and Compounds
 |
| 出版日期 | 2012 |
| 卷号 | 515页码:154-160 |
| 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 |
| ISSN号 | 0925-8388 |
| 中文摘要 | 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. |
| 原文出处 | |
| 公开日期 | 2013-02-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/60495]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 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. |
| 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. |
| 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. |
入库方式： OAI收割
来源：金属研究所
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