To provide an iron-based metallic glass alloy which can be produced with the use of a general industrial material basically containing an element in a general-purpose iron group without using an expensive special metal in the atmosphere, and of which the ribbon material with a larger sectional area than previous one can be easily produced.
The iron-based metallic glass alloy is composed of a metallic content and a metalloid content. In order to stably produce an amorphous alloy even in the atmosphere, the glass alloy mainly includes three elements (Fe, Co and Ni) in an iron group, though further mainly including Fe; a small amount of Nb and Mo as elements for improving the degree of undercooling; and further Si, B, P and C at an appropriate blending ratio as metalloid elements. The glass alloy shows ▵Tx≥40 K, when ▵Tx represents the degree of undercooling defined as Tx-Tg (Tx: crystallization starting temperature, and Tg: glass transition temperature), so as to easily produce an amorphous state even when being cooled with a low cooling capacity like in mass production.
COPYRIGHT: (C)2006,JPO&NCIPI
Kazutoshi Nishimura
Kurosaki Jungo
Kiyoshi Okumura
Koji Kajita
Takehiko Mizuno
Suzuki Yukinori
Shinto Industry Co., Ltd.
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