PREPARATION OF MELT-ATOMIZED AND SPRAY-DEPOSITED LA62AL15.7(CU0.5NI0.5)22.3 AMORPHOUS ALLOY

Acta Metall Sin

2008, Vol. 44

Issue (6): 659-664 DOI:

Research Articles

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PREPARATION OF MELT-ATOMIZED AND SPRAY-DEPOSITED LA62AL15.7(CU0.5NI0.5)22.3 AMORPHOUS ALLOY

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北京科技大学新金属材料国家重点实验室

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;. PREPARATION OF MELT-ATOMIZED AND SPRAY-DEPOSITED LA62AL15.7(CU0.5NI0.5)22.3 AMORPHOUS ALLOY. Acta Metall Sin, 2008, 44(6): 659-664 .

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Abstract It is known as very difficult to prepare bulk amorphous alloys with much larger size, because the heat release will be hindered and crystallization takes place when the bulk grows larger. In view of existing the bottleneck, a full La62Al15.7(Cu0.5Ni0.5)22.3 amorphous alloy with a diameter of 340 mm and maximum thickness of 13 mm was produced by melt atomization and spray deposition. The formation mechanism of amorphous phase during the process was analyzed. The experimental results have shown that there always exist some porosity in the spray-deposited La62Al15.7(Cu0.5Ni0.5)22.3 amorphous alloy. The micropores in the La62Al15.7(Cu0.5Ni0.5)22.3 amorphous alloy can be eliminated by hot pressing in the undercooled liquid region of the amorphous alloy. The present results have indicated that spray deposition is a potential technique to prepare bulk amorphous alloys with larger size, especially for bigger plate-shaped deposit.

Key words: melt atomization spray deposition La-based alloy amorphous alloy

Received: 18 December 2007

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TG139.8

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