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ID 115406
Title Alternative
Three-Dimensional Morphology of C15–Al2Ca Precipitates in a Mg–Al–Ca Alloy
Author
Kashiwase, Sakiko Tokyo Institute of Technology|Toyota Industries Co.
Unekawa, Mariko Tokyo Institute of Technology
Terada, Yoshihiro Tokyo Institute of Technology
Keywords
magnesium alloy
die-cast
Laves phase
high-resolution transmission electron microscopy (HRTEM)
morphology
Content Type
Journal Article
Description
The three-dimensional morphology and thickness of the C15–Al2Ca Laves phase, which precipitated within the primary α-Mg grains, were investigated for the Mg–5Al–1.5Ca alloy over-aged at 523 K for 100 h using the high-resolution transmission electron microscopy (HRTEM). The C15–Al2Ca phase precipitated with a hexagonal plate-like morphology along the (0001)α basal plane of the α-Mg matrix phase, where the sides of the hexagonal plates were parallel to the second columnar plane {1120}α of the α matrix. The typical coffee bean contrast was clearly visible around the precipitates, indicative of coherent precipitation of the C15–Al2Ca phase. The thickness of the C15–Al2Ca precipitates, which corresponds to the six layers of (111)C15 plane composed of Ca atoms, was evaluated to be approximately 1.5 nm.
Journal Title
Journal of the Japan Institute of Metals and Materials
ISSN
00214876
18806880
NCID
AN00062446
Publisher
日本金属学会
Volume
83
Issue
6
Start Page
193
End Page
197
Published Date
2019-05-25
EDB ID
DOI (Published Version)
URL ( Publisher's Version )
FullText File
language
jpn
TextVersion
Publisher
departments
Science and Technology