Formation of the ζ phase at an interface between an Fe substrate and a molten 0.2 mass% Al-Zn during galvannealing

被引：80

作者：

Kato, T

Nunome, K

Kaneko, K

Saka, H ^{[1
]}

机构：

[1] Nagoya Univ, Dept Quantum Engn, Nagoya, Aichi 4648603, Japan

[2] Japan Sci & Technol Corp, Japan Fine Ceram Ctr 2F, Atsuta Ku, Nagoya, Aichi 4568587, Japan

[3] Japan Fine Ceram Ctr, Atsuta Ku, Nagoya, Aichi 4568587, Japan

来源：

ACTA MATERIALIA | 2000年 / 48卷 / 09期

关键词：

transmission electron microscopy (TEM); plating; microstructure; multilayers; surfaces & interfaces;

D O I：

10.1016/S1359-6454(00)00037-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An interstitial free (IF) steel was dipped in a bath of molten Zn containing 0.2 mass% Al. The as-dipped (galvanized) steel was then annealed above the melting point of Zn (galvannealed), say at 773 K, for a period ranging from 1 to 30 s. Evolution of the microstructure of the Zn-containing coating was examined by transmission electron microscopy (TEM) and the chemical composition around the Zn(Al)/Fe interface was analyzed by energy dispersion spectroscopy (EDS) in a dedicated scanning transmission electron microscope (STEM). In the as-dipped (galvanized) steel a continuous layer of Fe2Al5 existed at the Zn(Al)/Fe interface, but no Fe-Zn intermetallic compounds were observed. Galvannealing at 773 K for 1 s resulted in the formation of the zeta phase at the Zn(Al)/Fe2Al5 interface, which grew at the expense of the Zn(Al) coating during the subsequent galvannealing. Possible mechanisms of nucleation of Fe-Zn intermetallic compounds are discussed. (C) 2000 Acta Metallurgica Inc. Published by Elsevier Science Ltd. AN rights reserved.

引用

页码：2257 / 2262

页数：6

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