Premium
Glass‐Forming Ability and Crystallization Behavior of Al 86 Ni 9 La 5 Metallic Glass with Si Addition
Author(s) -
Yi Jiaojiao,
Xu Wanqiang,
Xiong Xianzhong,
Kong Lingti,
Ferry Micheal,
Li Jinfu
Publication year - 2016
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201500354
Subject(s) - materials science , amorphous metal , crystallization , indentation hardness , thermal stability , glass transition , amorphous solid , chemical stability , metallurgy , metal , analytical chemistry (journal) , chemical engineering , crystallography , microstructure , composite material , alloy , polymer , chemistry , chromatography , engineering
The glass‐forming ability (GFA) of (Al 86 Ni 9 La 5 ) 100− x Si x alloys, where x = 0.0, 0.2, 0.5, 1.0 and 2.0, were determined with the crystallization behavior of these alloys. As the Si content increases, the GFA reaches a maximum at x = 0.2 and then continuously decreases. The thermal stability of the metallic glass is also deteriorated owing to the Si addition, which is accompanied by a gradual disappearance of the glass transition in the DSC traces. It is demonstrated that the peak in GFA at x = 0.2 is due to the increase in atomic packing efficiency while the deterioration of GFA at larger x is related to the chemical action between Si and other elements, which leads to a heterogeneous amorphous structure and a significant increase in microhardness at x = 0.5.