| dc.creator |
Zhang, Yong |
|
| dc.creator |
Lee, Irene Mei Ling |
|
| dc.creator |
Tan, Hao |
|
| dc.creator |
Jing, Qin |
|
| dc.creator |
Li, Yi |
|
| dc.date |
2003-12-13T16:21:24Z |
|
| dc.date |
2003-12-13T16:21:24Z |
|
| dc.date |
2004-01 |
|
| dc.date.accessioned |
2013-10-09T02:32:37Z |
|
| dc.date.available |
2013-10-09T02:32:37Z |
|
| dc.date.issued |
2013-10-09 |
|
| dc.identifier |
http://hdl.handle.net/1721.1/3824 |
|
| dc.identifier.uri |
http://koha.mediu.edu.my:8181/xmlui/handle/1721 |
|
| dc.description |
The microstructure, and phase selections of La₆₆Al₁₄(Cu, Ni)₂₀ alloy were studied by Bridgman solidifications, and composite materials of dendrites in amorphous matrix or micro- and nano- sized eutectic matrix were formed with different cooling rates. The volume fraction of the dendrite phase reaches a maximum at the cooling rate of about 15 K/s, the secondary dendrite arm spacing λ₂ decreases from 4.3 µm to 0.6 µm with the increasing of cooling rate R, and obeys the equation of λ₂R⁰.⁵⁷=1.74µm(K/s)R⁰.⁵⁷. The compression strength, as well as the elastic strain limit of the dendrite/amorphous matrix composite are 600 MPa, and 2.3%, respectively. Improved ductility was observed for the dendrite amorphous matrix composites with more dendrite phase by slow cooling rate. |
|
| dc.description |
Singapore-MIT Alliance (SMA) |
|
| dc.format |
619745 bytes |
|
| dc.format |
application/pdf |
|
| dc.language |
en_US |
|
| dc.relation |
Advanced Materials for Micro- and Nano-Systems (AMMNS); |
|
| dc.subject |
Bridgman solidification |
|
| dc.subject |
bulk metallic glass |
|
| dc.subject |
eutectic |
|
| dc.subject |
La-based alloy |
|
| dc.title |
Effect of Microstructure Changes on Mechanical Properties of La₆₆Al₁₄(Cu, Ni)₂₀ Amorphous and Crystalline Alloys |
|
| dc.type |
Article |
|