Porous FeAl alloys via powder sintering:Phase transformation,microstructure and aqueous corrosion behavior

Gang Chen ¹Klaus-Dieter Liss ²Chao Chen ³Yuehui He ³Xuanhui Qu ³Peng Cao⁴

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作者信息

1. Beijing Advanced Innovation Center for Materials Genome Engineering,Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing,100083,PR China
2. Materials and Engineering Science Program,Guangdong Technion-Israel Institute of Technology,Shantou,Guangdong,515063,PR China;Technion-Israel Institute of Technology,Haifa,32000,Israel;School of Mechanical,Materials,Mechatronic and Biomedical Engineering,Faculty of Engineering & Information Sciences,University of Wollongong, Wollongong,NSW,2522,Australia
3. State Key Laboratory for Powder Metallurgy,Central South University,Changsha,410083,PR China
4. Department of Chemical and Materials Engineering,The University of Auckland,Private Bag 92019,Auckland,1142,New Zealand;MacDiarmid Institute of Advanced Materials and Nanotechnology,Victoria University of Wellington,PO Box 600,Wellington,6140,New Zealand
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Abstract

This study investigates the phase transformation and microstructure of porous FeAl parts sintered from elemental powder mixtures using in-situ neutron diffraction and in-situ thermal dilatometry.A single B2 structured FeAl phase was determined in the sintered FeAl alloy.The combined effects of the Kirk-endall porosity,transient liquid phase,and phase transformations associated with powder sintering all contribute to the swelling phenomenon of the final sintered part.The aqueous corrosion test indicates that the corrosion products include iron oxides in the porous FeAl parts.The accumulation of corrosion products blocks the pore channel and decreases pore size and permeability over the soaking time.

Key words

Powder sintering/Intermetallic/Porous/Corrosion/Neutron diffraction

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基金项目

We thank the financial support from the National Natural Sci-ence Foundation of China(51971036)

Shandong Provincial Key Research and Development Program(2019JZZY010327)

and Fundamental Research Fundsfor the Central Universities(06500092)

Beamtime at the Bragg Institute,now Australian Cen-ter for Neutron Scattering,is greatly appreciated under proposal(number p3430)

出版年

2021

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI

影响因子：0.657

ISSN：1005-0302

参考文献量30

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