Open AccessMICROSTRUCTURE CHARACTERISTICS AND THE GRAVITY INFLUENCE FOR UNIDIRECTIONALLY SOLIDIFIED Zr65Cu17.5Ni10Al7.5 ALLOY
Author(s) -
Riping Liu,
Jianhua Zhao,
Xiangyi Zhang,
Dahai He,
Xu Ying-Fan,
Wenkui Wang
Publication year - 1998
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.47.1571
Subject(s) - microstructure , alloy , materials science , buoyancy , front (military) , phase (matter) , directional solidification , convection , mechanics , composite material , geology , physics , quantum mechanics , oceanography
This paper studies the phase morphologies of glass-forming Zr65Cu17.5Ni10Al7.5 alloy during unidirectional solidification, as well as the gravity influence on them. The direction of the microstructure became worse when the moving speed of the furnace exceeded a critical value. This critical speed was about 5mm/min for Zr65Cu17.5Ni10Al7.5 alloy in the present experiments. Different relationship between the direction of the movement of the solid-liquid interface and the gravity field led to different states of buoyancy convection, and finally different phase morphologies were obtained. When the movement direction was the same as the gravity vector, the primary phase was less and finer without an evident transition region in front of the interface. However, when the two directions were opposite to each other, more and coarser primary phase was obtained with an evident transition region appearing in front of the interface.