引用本文:刘顾,汪刘应,葛超群,蔡叶平.CNTs含量对微弧等离子喷涂CNTs/AT40涂层力学性能的影响[J].中国表面工程,2016,29(5):95~101
LIU Gu,WANG Liu-ying,GE Chao-qun,CAI Ye-ping.Effects of CNTs Content on Mechanical Performance of Plasma Sprayed CNTs/AT40 Coatings[J].China Surface Engineering,2016,29(5):95~101
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CNTs含量对微弧等离子喷涂CNTs/AT40涂层力学性能的影响
刘顾1, 汪刘应1, 葛超群1, 蔡叶平2
1.火箭军工程大学 装备管理工程系, 西安 710025;2.中国人民解放军驻211厂 军事代表室, 北京 100076
摘要:
采用微弧等离子喷涂成功制备了CNTs/Al2O3-40% TiO2复合吸波涂层，借助扫描电镜、X射线衍射仪、拉伸试验机、显微硬度计等测试手段，对涂层的组织结构、结合强度、显微硬度和热震性能进行了测试分析。结果表明：涂层组织结构致密，孔隙率低；CNTs的含量对复合涂层的力学性能有较大影响，随CNTs含量的增加，CNTs/AT40复合涂层的结合强度、显微硬度和热震性能都先增大后减小。CNTs质量分数为3%时，平均结合强度最高，厚度0.5 mm时结合强度为32.08 MPa，比AT40涂层的结合强度24.09 MPa提高了33.2%，平均显微硬度为821.6 HV0.1，比AT40涂层提高了20.4%，厚度2.0 mm时热震次数为63次，比AT40涂层增加了16%。
关键词:  等离子喷涂  组织结构  力学性能  碳纳米管
DOI：10.11933/j.issn.1007-9289.2016.05.012
分类号:
基金项目:陕西省科技创新团队（2014KCT-03）；新世纪优秀人才支持计划（NCET-11-0868）；陕西省自然科学基金（2014JM2-5084）
Effects of CNTs Content on Mechanical Performance of Plasma Sprayed CNTs/AT40 Coatings
LIU Gu1, WANG Liu-ying1, GE Chao-qun1, CAI Ye-ping2
1.Department of Equipment Management Engineering, Rocket Force University of Engineering, Xi'an 710025;2.Military Representative Office, No. 211 Factory of the Chinese People's Liberation Army, Beijing 100076
Abstract:
CNTs/Al2O3-40% TiO2 composite coatings were prepared by micro-plasma spraying. The microstructure, bongding strength, microhardness and thermal shock resistence of the composite coatings were analyzed by scaning electron microscope (SEM), X-ray diffraction (XRD), electron tensile tester and microhardness tester. Results show that the coatings are dense and represent low porosity. The content of CNTs plays a key effect on the mechanical performance of CNTs/AT40 coatings. With increasing CNTs content, the bond strength, microhardness and thermal shock resistence of CNTs/AT40 composite coatings first increase and then decrease. CNTs/AT40 composite coatings with 3% CNTs content possess the highest bond strength and microhardness, which is 32.08 MPa and 821.6 HV0.1, increased by 33.2% and 20.4% than that of AT40 coatings, respectively. The thermal shock number of 3% CNTs/AT40 composite coatings is 63 times, which is raised by more than 16% compared with that of AT40 coatings.
Key words:  micro-plasma spraying  microstructure  mechanical performance  carbon nano tube (CNT)
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