高类金属含量非晶态合金的晶化温度研究

A Study on the Crystallization Temperature of Amorphous Alloys with High Content of Metalloids

研究了含有Ｂ、Ｓｉ二种类金属元素的Ｎｉ基非晶态合金的品化温度随其中活性较强的类金属元素Ｂ含量的变化关系，发现当Ｂ含量＜１７．５ａｔ％时，出现二个晶化温度Ｔｃｒ１和Ｔｃｒ２；当Ｂ含量＞１７．５ａｔ％时，则只有一个晶化温度Ｔｃｒ．利用“双层单元结构模型”和“结构缺陷形成机制”，对其微观机理给出了理论模型解释．

In this paper, the relations between the crystallization temperatures and the contents of metalloids(B,Si) in Ni-based amorphous alloys have been studied. It has ho found out experimentally that there are two crystallization temperatures Tcr1 and Tcr2 as the content of B being<17.5at%, and only one crystallization temperature To as the content of B being> 17.5at% .For their microscopiC mechanism, a theoretical model has ho given by means of the“model of double-layer structural units”and the“formation mechanism of structural defects”.