Abstract
The solidification behavior of the icosahedral (i) phase in (Al62-xBex)Cu25.5Fe12.5 (x = 0,7) alloys has been investigated using a conventional casting technique. It was observed that the addition of beryllium (Be) modified the i-phase formation mechanism from peritectic reaction to primary solidification compared to as-cast Al62Cu25.5Fe12.5 alloy. The establishment of the new solidification path is attributed to the narrowing of the freezing range resulting from the beryllium addition. However, the resolidification at a slow cooling rate could result in the formation of the i-phase by peritectic reaction. The conversion of the initial solidification path to the peritectic solidification was attributed to a cooling rate effect resulting from the elaboration process. A new decomposition process of the bulk single i-phase in the Be-containing alloy is also proposed in the present paper.
| Original language | English |
|---|---|
| Pages (from-to) | 254-262 |
| Number of pages | 9 |
| Journal | Journal of Non-Crystalline Solids |
| Volume | 297 |
| Issue number | 2-3 |
| DOIs | |
| Publication status | Published - 2002 Feb 1 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Materials Chemistry
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Solidification paths for an icosahedral quasicrystalline phase in cast Al62Cu25.5Fe12.5 and Al55Cu25.5Fe12.5Be7 alloys. / Song, G. S.; Lee, M. H.; Kim, W. T.; Kim, Do Hyang.
In: Journal of Non-Crystalline Solids, Vol. 297, No. 2-3, 01.02.2002, p. 254-262.Research output: Contribution to journal › Article
TY - JOUR
T1 - Solidification paths for an icosahedral quasicrystalline phase in cast Al62Cu25.5Fe12.5 and Al55Cu25.5Fe12.5Be7 alloys
AU - Song, G. S.
AU - Lee, M. H.
AU - Kim, W. T.
AU - Kim, Do Hyang
PY - 2002/2/1
Y1 - 2002/2/1
N2 - The solidification behavior of the icosahedral (i) phase in (Al62-xBex)Cu25.5Fe12.5 (x = 0,7) alloys has been investigated using a conventional casting technique. It was observed that the addition of beryllium (Be) modified the i-phase formation mechanism from peritectic reaction to primary solidification compared to as-cast Al62Cu25.5Fe12.5 alloy. The establishment of the new solidification path is attributed to the narrowing of the freezing range resulting from the beryllium addition. However, the resolidification at a slow cooling rate could result in the formation of the i-phase by peritectic reaction. The conversion of the initial solidification path to the peritectic solidification was attributed to a cooling rate effect resulting from the elaboration process. A new decomposition process of the bulk single i-phase in the Be-containing alloy is also proposed in the present paper.
AB - The solidification behavior of the icosahedral (i) phase in (Al62-xBex)Cu25.5Fe12.5 (x = 0,7) alloys has been investigated using a conventional casting technique. It was observed that the addition of beryllium (Be) modified the i-phase formation mechanism from peritectic reaction to primary solidification compared to as-cast Al62Cu25.5Fe12.5 alloy. The establishment of the new solidification path is attributed to the narrowing of the freezing range resulting from the beryllium addition. However, the resolidification at a slow cooling rate could result in the formation of the i-phase by peritectic reaction. The conversion of the initial solidification path to the peritectic solidification was attributed to a cooling rate effect resulting from the elaboration process. A new decomposition process of the bulk single i-phase in the Be-containing alloy is also proposed in the present paper.
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U2 - 10.1016/S0022-3093(01)01040-7
DO - 10.1016/S0022-3093(01)01040-7
M3 - Article
VL - 297
SP - 254
EP - 262
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
SN - 0022-3093
IS - 2-3
ER -