Features of the morphology, defect substructure, and phase composition of metal and alloy surfaces upon high-power ion beam irradiation
Features of the morphology, defect substructure, and phase composition of metal and alloy surfaces upon high-power ion beam irradiation
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DOI：
10.1016/j.surfcoat.2003.11.021
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发表时间：
2004-07
影响因子：
5.4
通讯作者：
A. D. Korotaev;A. Tyumentsev;Yu. P. Pinzhin;G. Remnev
中科院分区：
文献类型：
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作者：
A. D. Korotaev;A. Tyumentsev;Yu. P. Pinzhin;G. Remnev
本文用光学金相、透射电镜和相分析等方法研究了金属和合金单晶和多晶在高能离子束辐照下，在厚度为Δh ≤ 0.2 μm的表面层中发生结构转变的机理。本文研究了纯金属（Ni，Mo）、单相（Mo-Re，Ni_3Al）和双相（V-ZrO_2）合金表面浮凸的形成、相组成和缺陷亚结构的变化与离子束功率密度Q=（1-10）× 107 W/cm ~ 2的关系。揭示了不同类别金属材料在HPIB辐照下显微组织形成的共同特征和区别。基于对金属及合金表面随时间变化的温度场和熔化蒸发过程的数值模拟预测，分析了金属及合金表面相结构改性的机理。
Optical metallography, transmission electron microscopy, and phase analysis were used to study the mechanisms of structural transformations in the surface layer of thickness Δh≈0.2 μm for single crystals and polycrystals of metals and alloys irradiated with high-power ion beams (HPIB's). Characteristic features of the formation of the surface relief and variations in phase constitution and defect substructure of pure metals (Ni, Mo) and single-phase (Mo–Re, Ni3Al) and double-phase (V–ZrO2) alloys have been found in relation to the ion beam power density Q=(1–10)×107W/cm2. Common features and distinctions in the formation of the microstructure of metallic materials belonging to different classes under HPIB irradiation have been revealed. Based on the predictions of a numerical simulation of the time-dependent temperature fields and the melting and evaporation processes in the surface layer, the mechanisms for the phase-structure modification of metal and alloy surfaces are analyzed.