Institute of Materials Physics, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm Strasse 10, 48149 Münster, Germany.
Phys Rev Lett. 2011 Dec 2;107(23):235503. doi: 10.1103/PhysRevLett.107.235503. Epub 2011 Nov 30.
Atomic diffusion in deformed Pd(40)Ni(40)P(20) bulk metallic glass containing a single family of deformation-induced shear bands was measured by the radiotracer technique. The significant, by orders of magnitude, enhancement of the diffusion rate with respect to that in the untransformed matrix suggests that the shear bands represent short-circuit diffusion paths. Correlations between diffusivity, viscosity, and the excess free volume distribution inside of shear bands are discussed.
利用放射性示踪技术测量了含有单一变形诱发剪切带家族的变形 Pd(40)Ni(40)P(20) 大块金属玻璃中的原子扩散。与未变形基体相比，扩散速率显著提高了几个数量级，这表明剪切带代表了短路扩散路径。讨论了扩散率、粘度和剪切带内过剩自由体积分布之间的相关性。
