Annealing Effect on the Intermetallic Compound Formation of Cold Sprayed Fe/Al Composite Coating

被引：2
作者：
Hong-Tao Wang
Chang-Jiu Li
Gang-Chang Ji
Guan-Jun Yang
机构：
[1] Jiujiang University,Jiujiang Key Laboratory for Green Remanufacturing, School of Mechanical and Materials Engineering
[2] Xi’an Jiaotong University,State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering
来源：
Journal of Thermal Spray Technology | 2012年 / 21卷
关键词：
annealing; coating; cold spray; Fe/Al composite; intermetallics; microstructure;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A Fe/Al composite coating was prepared by cold spraying using an iron-aluminium powder mixture with a Fe/Al atomic ratio of 1:1. The effect of annealing temperature on the intermetallic compound formation in the cold-sprayed Fe/Al coating was investigated. The as-sprayed and annealed coatings were characterized by x-ray diffraction (XRD), and scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy. Results showed that intensive particle deformation on impact promoted the Fe2Al5 intermetallic compound formation at a low annealing temperature of 450 °C and this intermetallic layer firstly appeared along some intimate contact regions at the aluminium-iron boundaries. The amount of the Fe2Al5 intermetallic compound increased and no other intermetallic compound phases appeared when the annealing temperature was raised from 450 to 600 °C. Some cracks developed in the Fe2Al5 intermetallic layer when the coating was annealed at 600 °C and the possible causes leading to evolution of cracks are discussed.
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页码：571 / 577
页数：6
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