Fe-Al微叠层复合材料的制备及界面表征

doi:10.12068/j.issn.1005-3026.2021.11.006

东北大学学报（自然科学版） ›› 2021, Vol. 42 ›› Issue (11): 1554-1561.DOI: 10.12068/j.issn.1005-3026.2021.11.006

Fe-Al微叠层复合材料的制备及界面表征

祖国胤，张影，魏振雄，满婷

(东北大学材料科学与工程学院，辽宁沈阳110819)

修回日期:2021-04-22 接受日期:2021-04-22 发布日期:2021-11-19
通讯作者: 祖国胤
作者简介:祖国胤(1977-)，男，黑龙江齐齐哈尔人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(51874087，52011530020).

Preparation and Interface Characterization of Fe-Al Micro-laminated Composites

ZU Guo-yin， ZHANG Ying， WEI Zhen-xiong， MAN Ting

School of Materials Science & Engineering， Northeastern University， Shenyang 110819， China.

Revised:2021-04-22 Accepted:2021-04-22 Published:2021-11-19
Contact: ZU Guo-yin
About author:-
Supported by:
-

摘要/Abstract

摘要： 将多层纯铁和纯铝薄板交替叠放，采用“热轧复合—冷轧减薄—合金化热处理”工艺流程制备了Fe-Al金属/金属间化合物微叠层复合材料(Fe-Al MIL)，研究了合金化温度对该复合材料微观组织、相组成、相变及力学性能的影响.结果表明:所制备的Fe-Al微叠复合材料Fe/Al界面结合状态良好;随合金化温度的升高，化合物层厚度随之增加，当温度低于Fe-Al固-半固态反应温度655℃时，Fe₂Al₅和FeAl是化合物层的主要物相，而高于655℃时，则会在化合物层和Fe金属界面处出现少量交替分布的FeAl₃和Fe₃Al;DSC曲线上呈现出~559，~571和~667℃三个放热峰，分别代表FeAl₃，Fe₂Al₅和FeAl的相转变;固-固和固-液合金化后得到的Fe-Al MIL力学性能较差，均易发生分层断裂现象，而固-半固态合金化热处理后其力学性能最佳.

关键词: 微叠层复合材料;热轧复合;冷轧减薄;合金化;界面

Abstract: Layers of pure iron and pure aluminum sheets were alternately stacked， and the Fe-Al metal-intermetallic-laminate(MIL)composites were prepared by the process of hot-rolling compound， cold-rolling reduction and alloying treatment. The effects of alloying temperature on the microstructure， phase composition， phase transformation， and mechanical properties of the Fe-Al MIL composite were investigated. The results show that the prepared Fe-Al MIL composite has a good Fe/Al interface bonding state. As the alloying temperature increases， the thickness of the compound layer increases. When the temperature is lower than the Fe-Al solid/semi-solid reaction temperature of 655℃， Fe₂Al₅ and FeAl are the main phases in the compound layers. When the temperature is above 655℃， a small amount of FeAl₃ and Fe₃Al appear alternately at the interface between the compound layer and the Fe matrix.The DSC curve shows there are three exothermic peaks of ~559， ~571 and ~667℃， which represent the phase transitions of FeAl₃， Fe₂Al₅， and FeAl， respectively. The mechanical properties of the Fe-Al MIL composites obtained after solid-solid and solid-liquid alloying are poor， and both are prone to delamination fracture. The best performance of Fe-Al MIL composite can be achieved after the solid/semi-solid alloying treatment.

Key words: micro-laminated composite; hot-rolling compound; cold-rolling reduction; alloying; interface

中图分类号:

TG141
TG146

祖国胤，张影，魏振雄，满婷. Fe-Al微叠层复合材料的制备及界面表征[J]. 东北大学学报（自然科学版）, 2021, 42(11): 1554-1561.

ZU Guo-yin， ZHANG Ying， WEI Zhen-xiong， MAN Ting. Preparation and Interface Characterization of Fe-Al Micro-laminated Composites[J]. Journal of Northeastern University(Natural Science), 2021, 42(11): 1554-1561.

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Fe-Al微叠层复合材料的制备及界面表征

Preparation and Interface Characterization of Fe-Al Micro-laminated Composites

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