Effect of annealing on the microstructure and erosion performance of cold-sprayed FeAl intermetallic coatings

被引：47
作者：
Yang, Guan-Jun [1 ]
Wang, Hong-Tao [1 ]
Li, Chang-Jiu [1 ]
Li, Cheng-Xin [1 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China
来源：
SURFACE & COATINGS TECHNOLOGY | 2011年 / 205卷 / 23-24期
基金：
美国国家科学基金会;
关键词：
FeAl; Intermetallics; Cold spray; Annealing treatment; Solid particle erosion; Cohesion; NANOSTRUCTURED MATERIALS; CORROSION-RESISTANCE; IRON ALUMINIDES; ALLOY COATINGS; HEAT-TREATMENT; ABRASIVE WEAR; COMPOSITES; DEPOSITION; BEHAVIOR; DEFORMATION;
D O I：
10.1016/j.surfcoat.2011.06.033
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
FeAl intermetallic coatings were prepared by cold spraying of mechanically alloyed metastable Fe(Al) powder assisted with post-spray annealing treatment. The microstructure evolution and erosion performance of the coatings annealed at different temperatures were investigated and the erosion mechanism of the intermetallic coatings was examined through the surface morphology and cross-sectional microstructure of the eroded coatings. After annealing at 650 degrees C, the heterogeneous feature in the as-sprayed coating was evidently modified. With annealing temperature rising to 950 degrees C and 1100 degrees C, the interfaces between the particles in the coating completely disappeared. The erosion rate of the coating at the erosion angles of both 30 degrees and 90 degrees decreased with the increase in the annealing temperature. It was found that the erosion resistance of the intermetallic coating annealed at 1100 degrees C was three times higher than that of the as-sprayed coating. The weight loss of the as-sprayed coating with low cohesion at erosion angle of 90 degrees was attributed to particle spalling off. The weight loss of the annealed intermetallic coatings with enhanced cohesion was attributed to microcutting and ploughing of erosive particles. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：5502 / 5509
页数：8
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