TY - JOUR
T1 - Aluminium phosphide as a eutectic grain nucleus in hypoeutectic Al-Si alloys
AU - Nogita, Kazuhiro
AU - McDonald, Stuart D.
AU - Tsujimoto, Katsuhiro
AU - Yasuda, Kazuhiro
AU - Dahle, Arne K.
N1 - Funding Information:
This research is supported by the Kyushu University High Voltage Electron Microscopy Program under the Nanotechnology Support Project of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan (project ID: T-Kyudai-H15-013). The authors also acknowledge financial support from the Center for Microscopy and Microanalysis (CMM) and the University of Queensland.
PY - 2004
Y1 - 2004
N2 - Aluminium phosphide (AlP) particles are often suggested to be the nucleation site for eutectic silicon in Al-Si alloys, since both the crystal structure and lattice parameter of AlP (crystal structure: cubic F43m; lattice parameter: 5.421 Å) are close to that of silicon (cubic Fd3m, 5.431 Å), and the melting point is higher than the Al-Si eutectic temperature. However, the crystallographic relationships between AlP particles and the surrounding eutectic silicon are seldom reported due to the difficulty in analysing the AlP particles, which react with water during sample preparation for polishing. In this study, the orientation relationships between AlP and Si are analysed by transmission electron microscopy using focused ion-beam milling for sample preparation to investigate the nucleation mechanism of eutectic silicon on AlP The results show a clear and direct lattice relationship between centrally located AlP particles and the surrounding silicon in the hypoeutectic Al-Si alloy.
AB - Aluminium phosphide (AlP) particles are often suggested to be the nucleation site for eutectic silicon in Al-Si alloys, since both the crystal structure and lattice parameter of AlP (crystal structure: cubic F43m; lattice parameter: 5.421 Å) are close to that of silicon (cubic Fd3m, 5.431 Å), and the melting point is higher than the Al-Si eutectic temperature. However, the crystallographic relationships between AlP particles and the surrounding eutectic silicon are seldom reported due to the difficulty in analysing the AlP particles, which react with water during sample preparation for polishing. In this study, the orientation relationships between AlP and Si are analysed by transmission electron microscopy using focused ion-beam milling for sample preparation to investigate the nucleation mechanism of eutectic silicon on AlP The results show a clear and direct lattice relationship between centrally located AlP particles and the surrounding silicon in the hypoeutectic Al-Si alloy.
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U2 - 10.1093/jmicro/dfh048
DO - 10.1093/jmicro/dfh048
M3 - Article
C2 - 15585468
AN - SCOPUS:9944240482
SN - 0022-0744
VL - 53
SP - 361
EP - 369
JO - Journal of Electron Microscopy
JF - Journal of Electron Microscopy
IS - 4
ER -