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1. (WO2017150440) METHOD FOR PRODUCING NANOCRYSTALLINE ALLOY RIBBON

Pub. No.:    WO/2017/150440    International Application No.:    PCT/JP2017/007459
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Tue Feb 28 00:59:59 CET 2017
IPC: C22C 45/02
H01F 1/153
H01F 41/02
Applicants: HITACHI METALS,LTD.
日立金属株式会社
METGLAS, INC.
メトグラス・インコーポレーテッド
Inventors: OHTA, Motoki
太田 元基
ITO, Naoki
伊藤 直輝
Title: METHOD FOR PRODUCING NANOCRYSTALLINE ALLOY RIBBON
Abstract:
This method for producing a nanocrystalline alloy ribbon includes obtaining a nanocrystalline alloy ribbon by bringing a partial area of an amorphous alloy ribbon that travels continuously while a tension F is applied thereto and that has a composition represented by Fe100-a-b-c-dBaSibCucMd (wherein each of a, b, c, and d is an atomic percent, the expressions 0 < a, 0 < b, 0 < c, 0 ≤ d, and 78 ≤ 100 - a - b - c - d are satisfied, and M represents Mo, Nb, or the like) into contact with the surface of a heat transfer medium maintained at a temperature of 450°C or more under conditions satisfying tc > 4/σ (wherein tc represents the time (seconds) from the time at which an arbitrary point on the amorphous alloy ribbon is brought into contact with the heat transfer medium to the time at which the arbitrary point separates from the heat transfer medium, and σ represents the calculated value of the contact pressure (kPa) between the amorphous alloy ribbon and the heat transfer medium).