在8个精选的二元金属系统中作了离子束混合的系统性研究,目的是探索各冶金因素对合成相特征的影响.实验结果表明,组元金属的结构在决定合成相结构中是最重要的因素,并导出了两个用离子束合成非晶态合金的充分条件.离子束合成亚稳相的机理可以看成是分两个步骤进行,即原子碰撞和弛豫过程,而合成相的最终结构是在弛豫过程中形成的.提出了一个热力学和动力学模型,它解释了本研究中获得的、以及文献中报道过的亚稳相形成机理.
A systematic study of ion beam mixing was conducted in eight selected bina-ry metal systems to investigate the effects of metallurgical factors on the char-acter of the ion mixed phases.The experimental results indicate that the crystal-line structure of the constituent metals is the most important one in determiningthe structure of the mixed phase,and lead to two sufficient conditions for syn-thesizing amorphous alloys by ion beam.The mechanisms of ion induced phaseformation are considered to be two-step processes,i.e.atomic collision and relax-ation processes,and the final structure of the phase obtained is formed duringthe relaxation processes.A thermodynamic and kinetic model is proposed and itexplains the formation of the metastable phases obtained in this study as well asthose reported earlier in the literature.
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