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快速凝固是材料科学与金属工艺中,近年来兴起的一个新的研究领域,指的是在大于10~5～10~6℃/秒的冷却速度下,合金以极快的速度从液态转变为固态的过程。 迄今为止,对熔体急冷金属的研究,多数集中于金属-类金属型合金,其中类金属元素P,Si,B等的含量在20at％(原子百分比)左右。对于由几种金属元素和在此基础上加入少量类金属元素(<10at％)组成的合金,则研究较少。本文选择Co-Nb二元合金及Co-Mo-B三元合金,目的是查明与分析快速凝固在这些合金系中所造成的结构特征。
Rapid solidification is a new field of research emerging in recent years in materials science and metal processing. It refers to the alloy rapidly changing from a liquid state to a solid state at a cooling rate greater than 10-5 to 10-6 ° C./s Solid state process. Until now, the research on melt quenched metals has been mostly focused on metal-metalloid alloys, in which the content of P, Si, B and the like is about 20 atomic%. For several metal elements and on the basis of adding a small amount of metal elements (<10at%) composed of the alloy, the less research. In this paper, Co-Nb binary alloys and Co-Mo-B ternary alloys were selected for the purpose of identifying and analyzing the structural features caused by rapid solidification in these alloys.