合金相团簇规律及其在Zr-Al-Ni非晶体系中的应用

研究多个典型非晶形成体系合金相结构中的团簇规律,指出在合金相结构中团簇之间以不同方式共享原子的事实。共享后的有效团簇到合金相的连接方式有两种,一种是共享后的团簇成分就是相成分,无须连接原子,另一种是共享后的团簇加上连接原子才能构成空间相结构(这类相称之为团簇相)。这种方法使得对合金相的结构有了一个全新的理解。在典型的非晶形成体系Zr-Al-Ni中,团簇相有3个:AlNiZr-Fe2P结构,Al2NiZr6-InMg2结构和Al5Ni3Zr2-Mn23Th6结构。通过此项工作还提出了基于合金相结构来确定与非晶形成相关的团簇的方法,即与非晶相关的团簇一般为团簇相里出来的孤立团簇,这一结论在Zr-Al-Ni体系中得到了很好的验证。

Cluster Rule in Alloy Phase and Its Application in Zr-Al-Ni System

The cluster rules of alloy phase structure of some typical bulk metallic glass systems were studied. The fact that the clusters share atoms each other in different ways in the alloy phase was pointed out. After sharing there are two kinds of cluster linkages: the first is the phase composition which does not need glue atoms; the other is that glue atoms are required to form phase structure, i.e. termed cluster phases. The method provides a new idea for the structure of alloy phase. In the typical bulk metallic glass system Zr-Al-Ni, there are three cluster phases, AlNiZr-Fe2P, Al2NiZr6-InMg2 and Al5Ni3Zr2-Mn23Th6. The method to determine the clusters related with metallic glass formation based on alloy phase structure was also put forward, i.e. the clusters related with the metallic glasses are generally the isolated clusters from cluster phases, which is verified very well in Zr-Al-Ni system.