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Bulk Glass Formation in Eutectic of La-Cu-Ni-Al Metallic Alloys

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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

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