Open AccessNUCLEATION OF THE A14Mn ALLOY DURING CONTAI-NERLESS SOLIDIFICATION IN A DROP TUBE
Author(s) -
Yu Ru,
Fuxiang Zhang,
Zhang Jun,
Wenkui Wang
Publication year - 1996
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.45.628
Subject(s) - supercooling , nucleation , quasicrystal , materials science , orthorhombic crystal system , alloy , tube (container) , icosahedral symmetry , drop (telecommunication) , phase (matter) , superheating , thermodynamics , crystallography , composite material , crystal structure , chemistry , physics , telecommunications , organic chemistry , computer science
The nucleation and undercooling of Al4Mn alloy have been investigated with 1.2 meter long drop tube. Melt droplets were solidified in vacuum and various sizes of droplets were collected at the bottom of the tube. Besides orthorhombic Al6Mn and β-Mn phases, there are two approximants of the decagonal quasicrystal, one approximant of the icosahedral quasicrystal, and decagonal domains, observed in the droplets. However, the amount of each phase is different in samples of various sizes due to the different cooling rates and undercooling. The relationship between the phase composition and the sample size was discussed on the basis of the classical nucleation and growth theories.