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本文对于由液态淬火制备的金属-类金属非晶态合金,首先从统计热力学观点,提出先形成以类金属原子为中心的化学短程序小原子团、再进行拓朴填充的结构缺陷形成机制,并利用“双层单元结构模型”使缺陷的分布状态具体化。再从小原子团内已不存在可滑动的“微位错元”组态出发,比较合理地解释了非晶态合金具有高强度的微观机理。最后利用Bailey-Hirsch关系式外推,具体估算了非晶态Fe基合金的强度,其数量级与已有的实验结果相当吻合,并进一步指出了提高非晶态合金强度的具体途径。
In this paper, for the metal-metalloid amorphous alloys prepared by liquid quenching, firstly, from the view of statistical thermodynamics, we propose to form the mechanism of structural defects by short-chemical short radicals centered on metal-like atoms and then topological filling Utilize “two-level unit structure model” to make the distribution status of defects concrete. Starting from the fact that there are no slidable “micro-dislocation elements” in small atomic clusters, the micro-mechanism of high-strength amorphous alloys is explained reasonably. Finally, the strength of amorphous Fe-based alloys was extrapolated by the Bailey-Hirsch equation. The order of magnitude is in good agreement with the existing experimental results, and the specific ways to improve the strength of the amorphous alloys are also pointed out.