Microstructure and properties of Al-Cr porous intermetallics fabricated by thermal explosion reaction

被引：10
作者：
Kang, Xueqin [1 ,2 ]
Yang, Chunmin [1 ]
Zhang, Haifei [2 ]
Du, Yin [1 ]
Feng, Peizhong [1 ]
机构：
[1] China Univ Min & Technol, Xuzhou 221116, Peoples R China
[2] Univ Liverpool, Oxford St, Liverpool L69 7ZD, Merseyside, England
来源：
MATERIALS LETTERS | 2018年 / 217卷
关键词：
Porous materials; Oxidation; Intermetallics; Powder metallurgy; Thermal explosion; SPACE HOLDER PROCESS; TEMPERATURE; ALLOYS; POWDER; FOAMS;
D O I：
10.1016/j.matlet.2018.01.093
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Al-Cr porous intermetallics were fabricated by thermal explosion (TE) reaction. Microstructure (phase composition and pore characteristics) and properties (expansion behavior, density and oxidation resistance) of Al-Cr sintered products were investigated. Results showed that the sintered products retained their original cylindrical shape with an obvious expansion behavior and high open porosity. The interconnected pores were mainly inherited from green compacts or come from the diffusion of liquid Al and volume expansion. The phase compositions of the specimen with Al:Cr = 8:5 and 9:4 were mainly Al8Cr5 with minor Al4Cr (in the specimen with Al: Cr = 9:4), Al2O3 and unreacted Cr. The intermetallics of the specimen with Al:Cr = 8:5 had superior oxidation resistance. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：174 / 176
页数：3
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