Change in the vibrational properties of bulk metal glass with time
文献类型：期刊论文
| 作者 | Wen, P ; Johari, GP ; Wang, RJ ; Wang, WH |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2006 |
| 卷号 | 73期号:22 |
| 关键词 | ROOM-TEMPERATURE VISCOUS-LIQUIDS STRUCTURAL RELAXATION SECONDARY RELAXATIONS SILICATE-GLASSES TRANSITION STATE HEAT RECOVERY SOLIDS |
| ISSN号 | 1098-0121 |
| 通讯作者 | Wen, P: McMaster Univ, Dept Mat Sci & Engn, Hamilton, ON L8S 4L7, Canada. |
| 中文摘要 | The velocity of ultrasonic longitudinal and transverse waves in Zr46.75Ti8.25Cu7.5Ni10Be27.5 bulk metal glass has been measured at 298 K after its annealing for different times at 523 K, a temperature 97 K below its apparent T-g. Elastic constants and vibrational contribution to thermodynamic properties have also been determined. At 298 K, the normalized value of the instantaneous bulk and shear moduli, K and G, increases with the annealing time, t, according to the relation [1-exp-(kt)(n)] with k=7.4x10(-6) s, n=0.5. It is found that K(t)=a+bG(t), where a and b are constants. In terms of a recent model for viscous flow, an extrapolated increase in G with t corresponds to an approximate three-fold increase in viscosity and 5% decrease in the mean-square atomic displacement at 298 K. The increase in K and G corresponds to a 2.4% increase in the Debye frequency, and 0.3% and 2.4% decrease, respectively, in the Debye heat capacity and entropy, and 0.86% increase in the Debye energy. The Poisson's ratio decreases with t, i.e., the glass becomes laterally stiffer. The K(t)=a+bG(t) relation is consistent with a relation obtained for Lennard-Jones interactions. In the potential energy landscape paradigm, annealing appears to shift the state point of a glass to a deeper and more-curved minimum. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/34552]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Wen, P,Johari, GP,Wang, RJ,et al. Change in the vibrational properties of bulk metal glass with time[J]. PHYSICAL REVIEW B,2006,73(22). |
| APA | Wen, P,Johari, GP,Wang, RJ,&Wang, WH.(2006).Change in the vibrational properties of bulk metal glass with time.PHYSICAL REVIEW B,73(22). |
| MLA | Wen, P,et al."Change in the vibrational properties of bulk metal glass with time".PHYSICAL REVIEW B 73.22(2006). |
入库方式： OAI收割
来源：物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。