CRYSTALLIZATION OF AMORPHOUS ALLOYS Fe_(80-x)Cu_x Si_5 B_(15) AND (Fe_(1-y) CO_y)_(82)Cu_4 Si_(4.4)B_(13.2)

Acta Metall Sin

1988, Vol. 24

Issue (1): 87-91 DOI:

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CRYSTALLIZATION OF AMORPHOUS ALLOYS Fe_(80-x)Cu_x Si_5 B_(15) AND (Fe_(1-y) CO_y)_(82)Cu_4 Si_(4.4)B_(13.2)

CHEN Huiyu;ZHANG Daoyuan;WANG Changsui;LU Guorong;LAN Zhigang University of Science and Technology of China; Hefei

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CHEN Huiyu;ZHANG Daoyuan;WANG Changsui;LU Guorong;LAN Zhigang University of Science and Technology of China; Hefei. CRYSTALLIZATION OF AMORPHOUS ALLOYS Fe_(80-x)Cu_x Si_5 B_(15) AND (Fe_(1-y) CO_y)_(82)Cu_4 Si_(4.4)B_(13.2). Acta Metall Sin, 1988, 24(1): 87-91.

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Abstract The crystallization behavior of amorphous alloys Fe_(80-x)Cu_xSi_5-B_(15) and(Fe_(1-y) Co_(y))_(82)Cu_4Si_(4.4)B_(13.2), has been studied by X-ray diffraction, Mossbauer γ-rayabsorption and conversion electron emission. Crystallization of amorphous ribbonprepared by means of single roller quenching starts at rough side in contact withroller. The product of crystallization is α-Fe. When a small amount of Fe issubstituted by Cu in amorphous Fe_(80)Si_5B_(15), the crystallization temperature increase.If the content of transition metal is more than 80 at.-%, for example 82 at.-%,a marked drop in crystallization temperature occurs. Three crystalline phases: α-Fe,Fe_2B and Fe_3B are coexistent for these two serises of Si-containing amorphousalloys after annealed 2h at 400--450℃. The metastable phase Fe_3B further trans-forms into Fe_2B and α-Fe at higher temperature.

Key words: Crystallization amorphous alloy crystalline phase coexistence

Received: 18 January 1988

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