• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering. A, Structural Materials >Interplay of process kinetics in the undercooled melt in the proximity of the glass transition
【24h】

Interplay of process kinetics in the undercooled melt in the proximity of the glass transition

机译：玻璃转变附近的过冷熔体中过程动力学的相互作用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The mobility of atomic (molecular) species or groups of atoms in the proximity of the glass transition where various processes can display similar time-scales and occur in competition with each other, is considered. In order to describe mobility, the product ηD (with η the viscosity and D a diffusion coefficient) is usually taken as constant at constant temperature (Stokes-Einstein equation). Viscosity is analysed at first in the frame of the strong/fragile classification of liquids. Then, the evidences that the SE equation does not hold both below and above T_g for some molecular and metallic glass-formers are reviewed. Since attachment kinetics in nucleation and growth of crystals is often found to depend on the rate of viscous flow, a possible link in its description with the breakdown of the Stokes-Einstein equation is suggested. The topic is reviewed for fluoride and metallic glass-formers with emphasis on Al-based alloys where a glass to nanocrystal transformation occurs.
机译：考虑了玻璃化转变附近的原子（分子）物种或原子团的迁移率，在该迁移率中各种过程可以显示相似的时标并相互竞争。为了描述迁移率，通常将乘积ηD（η为粘度，D为扩散系数）在恒定温度下视为常数（斯托克斯-爱因斯坦方程式）。首先，在液体的强/弱分类框架中分析粘度。然后，对一些分子和金属玻璃形成剂的SE方程在T_g上下均不成立的证据进行了回顾。由于通常发现晶体成核和生长过程中的附着动力学取决于粘性流的速率，因此建议在其描述中与斯托克斯-爱因斯坦方程式的分解联系起来。审查了氟化物和金属玻璃形成剂的主题，重点是发生玻璃到纳米晶体转变的Al基合金。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号