| dc.creator |
Zhang, Yong |
|
| dc.creator |
Tan, Hao |
|
| dc.creator |
Li, Yi |
|
| dc.date |
2003-11-24T20:43:53Z |
|
| dc.date |
2003-11-24T20:43:53Z |
|
| dc.date |
2003-01 |
|
| dc.date.accessioned |
2013-10-09T02:32:11Z |
|
| dc.date.available |
2013-10-09T02:32:11Z |
|
| dc.date.issued |
2013-10-09 |
|
| dc.identifier |
http://hdl.handle.net/1721.1/3721 |
|
| dc.identifier.uri |
http://koha.mediu.edu.my:8181/xmlui/handle/1721 |
|
| dc.description |
A eutectic in La-rich La-Cu₀.₅Ni₀.₅-Al alloys was determined by studying the melting behaviors and the microstructure observations. The microstructures of the La-Cu-Ni-Al alloys prepared by Bridgman Solidification and copper mould casting were studied by using scanning electron microscope (SEM). The results show that La₆₆[Cu₀.₅Ni₀.₅]₂₀Al₁₄ alloy is very near to a pseudo-ternary eutectic. When the cooling rate is higher than 450 K/s, fully amorphous can be formed; when the cooling rate is within 15 K/s to 450 K/s, the alloy has a microstructure of dendrite plus amorphous, when the cooling rate is within 12 K/s to 1.5 K/s, the microstructures of the alloy are dendrite plus eutectic, and when the cooling rate is lower than 0.12 K/s, the morphology of the alloy is eutectic microstructure. The off eutectic alloy has better glass forming ability, the best glass forming alloy obtained at La₆₂[Cu₀.₅Ni₀.₅>]₂₄Al₁₄ along the composition line of La₈₆₋x[Cu₀.₅Ni₀.₅]xAl₁₄. It has a potential to form bulk metallic glassy rod samples with diameter larger than 12 mm. |
|
| dc.description |
Singapore-MIT Alliance (SMA) |
|
| dc.format |
3165201 bytes |
|
| dc.format |
application/pdf |
|
| dc.language |
en_US |
|
| dc.relation |
Advanced Materials for Micro- and Nano-Systems (AMMNS); |
|
| dc.subject |
amorphous materials |
|
| dc.subject |
Lanthanum alloys |
|
| dc.subject |
cooling |
|
| dc.subject |
metallic glasses |
|
| dc.title |
Bulk Glass Formation in Eutectic of La-Cu-Ni-Al Metallic Alloys |
|
| dc.type |
Article |
|