Fast fabrication of Al3Ti/Al composites using combustion synthesis and melt dilution

被引：9
作者：
Yang, Rui [1 ]
Zhao, Fei [1 ]
Wang, Linzhi [1 ]
Zhang, Zhenya [2 ]
Zhang, Binbin [3 ]
机构：
[1] Zhenjiang Coll, Sch Elect & Informat, Zhenjiang 212028, Jiangsu, Peoples R China
[2] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Jiangsu, Peoples R China
[3] Zhenjiang Haili New Mat Technol Co Ltd, Zhenjiang 212000, Jiangsu, Peoples R China
来源：
MATERIALS LETTERS | 2021年 / 298卷
关键词：
Metallic composites; Intermetallic alloys and compounds; Combustion synthesis; Al-Ti system; Microstructure; MECHANICAL-PROPERTIES; SITU; MICROSTRUCTURE; BEHAVIOR; KINETICS;
D O I：
10.1016/j.matlet.2021.130036
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A simple method combined combustion synthesis (CS) and melt dilution was utilized to fast fabricate Al3Ti/Al composites. This paper mainly focuses on analyzing the effect of heat source temperature (T-hs) on combustion behaviors and reaction products in the 5Al-Ti system. The ultrafast heating rate induced by Th s could activate liquid-solid combustion in powder compacts. Due to the presence of Al3Ti layer acted as a diffusion barrier, it is suggested that reaction kinetics is mainly Ti-diffusion-controlled. Increasing the heating rate remarkably enhances the Ti flux across Al3Ti layer into the Al melt, which in turn releases a higher reaction exothermicity and finally promotes reaction to completion. Based on the above experimental results, a dissolution-precipitation mechanism for Al3Ti formation during CS was established. (C) 2021 Elsevier B.V. All rights reserved.
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页数：4
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