Abstract
In this paper, we report the formation of the new quaternary icosahedral quasicrystal in the Al-Mn-Si-Be system, which has a primitive icosahedral structure and has a significant lower cooling rate at the time of its formation. The icosahedral quasicrystalline phase was found to form in the Al-rich composition of Al-Mn-Si-Be alloy by conventional casting technique as well as by rapid quenching technique, indicating that the addition of Be to Al-Mn-Si alloys improves the quasicrystal forming ability. The icosahedral phase in conventionally cast Al-Mn-Si-Be alloys forms as a dendritic phase in the under-cooled melt showing five well-developed branches indicating the five-fold symmetry structure. At the later stage of the growth of the icosahedral phase, 1/1 approximant phase forms heterogeneously from the icosahedral phase. The Al-Mn-Si-Be icosahedral phase is metastable, and transforms into the 1/1 cubic approximant phase at high temperature.
| Original language | English |
|---|---|
| Pages (from-to) | 992-997 |
| Number of pages | 6 |
| Journal | Materials Science and Engineering A |
| Volume | 375-377 |
| Issue number | 1-2 SPEC. ISS. |
| DOIs | |
| Publication status | Published - 2004 Jul 1 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
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Microstructure modification and quasicrystalline phase formation in Al-Mn-Si-Be cast alloys. / Chang, H. J.; Fleury, E.; Song, G. S.; Lee, M. H.; Kim, W. T.; Kim, Do Hyang.
In: Materials Science and Engineering A, Vol. 375-377, No. 1-2 SPEC. ISS., 01.07.2004, p. 992-997.Research output: Contribution to journal › Article
TY - JOUR
T1 - Microstructure modification and quasicrystalline phase formation in Al-Mn-Si-Be cast alloys
AU - Chang, H. J.
AU - Fleury, E.
AU - Song, G. S.
AU - Lee, M. H.
AU - Kim, W. T.
AU - Kim, Do Hyang
PY - 2004/7/1
Y1 - 2004/7/1
N2 - In this paper, we report the formation of the new quaternary icosahedral quasicrystal in the Al-Mn-Si-Be system, which has a primitive icosahedral structure and has a significant lower cooling rate at the time of its formation. The icosahedral quasicrystalline phase was found to form in the Al-rich composition of Al-Mn-Si-Be alloy by conventional casting technique as well as by rapid quenching technique, indicating that the addition of Be to Al-Mn-Si alloys improves the quasicrystal forming ability. The icosahedral phase in conventionally cast Al-Mn-Si-Be alloys forms as a dendritic phase in the under-cooled melt showing five well-developed branches indicating the five-fold symmetry structure. At the later stage of the growth of the icosahedral phase, 1/1 approximant phase forms heterogeneously from the icosahedral phase. The Al-Mn-Si-Be icosahedral phase is metastable, and transforms into the 1/1 cubic approximant phase at high temperature.
AB - In this paper, we report the formation of the new quaternary icosahedral quasicrystal in the Al-Mn-Si-Be system, which has a primitive icosahedral structure and has a significant lower cooling rate at the time of its formation. The icosahedral quasicrystalline phase was found to form in the Al-rich composition of Al-Mn-Si-Be alloy by conventional casting technique as well as by rapid quenching technique, indicating that the addition of Be to Al-Mn-Si alloys improves the quasicrystal forming ability. The icosahedral phase in conventionally cast Al-Mn-Si-Be alloys forms as a dendritic phase in the under-cooled melt showing five well-developed branches indicating the five-fold symmetry structure. At the later stage of the growth of the icosahedral phase, 1/1 approximant phase forms heterogeneously from the icosahedral phase. The Al-Mn-Si-Be icosahedral phase is metastable, and transforms into the 1/1 cubic approximant phase at high temperature.
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U2 - 10.1016/j.msea.2003.10.004
DO - 10.1016/j.msea.2003.10.004
M3 - Article
VL - 375-377
SP - 992
EP - 997
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
IS - 1-2 SPEC. ISS.
ER -