Surface modification of CoCrAlY coating by high-current pulsed electron beam treatment under the "evaporation" mode

被引：24
作者：
Cai, Jie [1 ]
Guan, Qingfeng [1 ]
Lv, Peng [1 ]
Hou, Xiuli [1 ]
Wang, Zhiping [2 ]
Han, Zhiyong [2 ]
机构：
[1] Jiangsu Univ, Sch Mat Sci & Engn, Zhengzhou 212013, Peoples R China
[2] Civil Aviat Univ China, Coll Sci, Tianjin 300300, Peoples R China
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2014年 / 337卷
基金：
中国国家自然科学基金;
关键词：
High current pulsed electron beam (HCPEB); CoCrAlY coating; Wavy aspects; Chemistry modifications; Evaporation; THERMAL BARRIER COATINGS; 316L STAINLESS-STEEL; OXIDATION RESISTANCE; CORROSION-RESISTANCE; BOND COAT; MICROSTRUCTURE; EVOLUTION; ALLOY; INSULATION; BEHAVIOR;
D O I：
10.1016/j.nimb.2014.07.025
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
High current pulsed electron beam (HCPEB) was conducted on a CoCrAlY coating. The microstructure evolution and surface morphology of the coatings were characterized by means of X-ray diffraction (XRD), scanning electron microscope (SEM), and three-dimensional laser scanning microscope (ISM), respectively. XRD result shows that Al2O3 and YAIO(3) phases were recorded in the irradiated coatings. Co-based oxides which originally existed in the initial samples disappeared and the content of CoAl peaks significantly reduced as the pulses increased. Microstructure observations reveal that the coarse surface was melted and the structural defects inherent in the initial coatings were sealed after HCPEB irradiation. Surface features such as wavy aspects with abundant particulates as well as nano-scale bubbles and chemistry modifications were discussed as the consequence of the evaporation-condensation process. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：90 / 96
页数：7
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