VISCOELASTIC MODEL FOR THE PLASTIC-FLOW OF AMORPHOUS SOLIDS UNDER ENERGETIC ION-BOMBARDMENT

被引：243

作者：

TRINKAUS, H ^{[1
]}

RYAZANOV, AI ^{[1
]}

机构：

[1] IV KURCHATOV ATOM ENERGY INST, RUSSIAN RES CTR, MOSCOW 123182, RUSSIA

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.74.5072

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Under energetic ion bombardment, amorphous solids show substantial plastic flow in the form of anisotropic growth. This is attributed to the relaxation of shear stresses coupled to the thermal expansion in cylindrical thermal spikes induced by intense electronic excitations and to the subsequent freezing-in of the associated strain increment upon cooling down. An asymptotic growth rate at high electronic stopping power and low irradiation temperature is derived which correlates the growth rate with a few simple material parameters without introducing any adjustable free parameter. Good agreement with measurements justifies the basic assumptions of the model. © 1995 The American Physical Society.

引用

页码：5072 / 5075

页数：4

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