| 等离子喷涂 NiCoCrAlY / Al2 O3 高温固体润滑耐磨涂层的抗氧化性能研究 |
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| 引用本文： | 曹玉霞,杜令忠,张伟刚,兰叶,黄传兵. 等离子喷涂 NiCoCrAlY / Al2 O3 高温固体润滑耐磨涂层的抗氧化性能研究[J]. 表面技术, 2015, 44(4): 48-53. DOI: 10.16490/j.cnki.issn.1001-3660.2015.04.009 |
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| 作者姓名： | 曹玉霞 杜令忠 张伟刚 兰叶 黄传兵 |
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| 作者单位： | 1. 唐山学院 环境与化学工程系,河北 唐山,063000;2. 中国科学院过程工程研究所 多相复杂系统国家重点实验室,北京,100190;3. 博天环境集团股份有限公司,北京,100082 |
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| 基金项目： | 国家自然科学基金项目(51471159);河北省自然科学基金项目(E2015105068);唐山市科技计划项目(14130286a);唐山学院材料科学与工程重点学科(TSC2013003) |
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| 摘 要： | 目的研究等离子喷涂NiCoCrAlY/Al2O3高温固体润滑耐磨涂层在850℃时的高温抗氧化性能和抗氧化机理。方法采用喷雾造粒、化工冶金包覆技术制备NiCoCrAlY/Al2O3复合粉体,并采用等离子喷涂技术在45#钢表面制备NiCoCrAlY/Al2O3复合涂层。采用SEM和XRD研究粉体和涂层的显微结构和物相组成,并采用马弗炉研究复合涂层在850℃的恒温氧化动力学曲线,通过研究氧化96 h以后涂层表面的组织形貌,探讨NiCoCrAlY/Al2O3复合涂层的抗氧化机理。结果 NiCoCrAlY合金层均匀致密地包覆在Al2O3颗粒的表面,包覆层厚度约为3~5μm。复合粉体的主要组成为Al2O3相和NiCoCrAlY合金相,没有其他杂质相的存在。等离子喷涂NiCoCrAlY/Al2O3复合涂层氧化动力学曲线分为大斜率直线、抛物线和系数几乎为0的抛物线等3个阶段。氧化96 h以后,涂层的氧化质量增量为4.9 mg/cm2左右,表面形成了一层连续的氧化物保护膜,经EDX分析,氧化膜层主要由Al,O,Cr和Ni组成。结论等离子喷涂NiCoCrAlY/Al2O3复合涂层具有良好的高温抗氧化性能,涂层中Ni,Cr,Al的氧化以及硬质相Al2O3的加入是涂层抗氧化的主要原因。
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| 关 键 词： | NiCoCrAlY/Al2 O3 复合涂层 等离子喷涂 抗氧化 |
| 收稿时间： | 2015-01-08 |
| 修稿时间： | 2015-04-20 |
Study on Oxidation Resistance of Atmospheric Plasma-sprayed NiCoCrAlY/ Al2O3 Wear-resistant Coatings at Elevated Temperature |
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| CAO Yu-xi,DU Ling-zhong,ZHANG Wei-gang,LAN Ye and HUANG Chuan-bing. Study on Oxidation Resistance of Atmospheric Plasma-sprayed NiCoCrAlY/ Al2O3 Wear-resistant Coatings at Elevated Temperature[J]. Surface Technology, 2015, 44(4): 48-53. DOI: 10.16490/j.cnki.issn.1001-3660.2015.04.009 |
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| Authors: | CAO Yu-xi DU Ling-zhong ZHANG Wei-gang LAN Ye HUANG Chuan-bing |
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| Affiliation: | Department of Environmental and Chemical Engineering, Tangshan College, Tangshan 063000, China,State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China,State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China,Botian Environmental Group Limited by Share Ltd, Beijing 100082, China and State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | ABSTRACT:Objective To study the oxidation resistance and oxidation-resistance mechanism of atmospheric plasma-sprayed NiC-oCrAlY/Al2 O3 wear-resistant coatings at 850℃. Methods The NiCoCrAlY/Al2 O3 composite powder was prepared by the technolo-gy of spray granulation, chemical and metallurgical coating and solid state alloying. The NiCoCrAlY/Al2 O3 composite coating was prepared by atmospheric plasma-spray technology using the prepared powder on the surface of 45# steel. The microstructure and phase composition of the powder and coating were studied by SEM and XED. The oxidation kinetic curve at constant 850 ℃ was explored with muffle furnace and the oxidation resistance mechanism of the APS sprayed NiCoCrAlY/Al2 O3 composite coatings was investigated through analysis of morphology of the coating surface after 96 h of oxidation. Results The Al2 O3 was evenly and closely coated with NiCoCrAlY alloy and the thickness of NiCoCrAlY alloy was 3 ~5 μm. The phase compositions of composite powder were mainly NiCoCrAlY and Al2 O3 without other impurities. The oxidation kinetics curves of the coatings can be divided into three stages:severely sloping, parabolic and slightly parabolic stages. The value of oxidation weight gain was about 4. 9 mg/cm2 after 96 h of oxidation. The oxide film was formed and the phase compositions of oxide film were Al,O, Cr and Ni according to the EDX a-nalysis. Conclusion The NiCoCrAlY/Al2 O3 composite coating exhibited excellent oxidation resistance property. The reason of oxi-dation resistance of the coating was the oxidation of Ni, Al and the addition of Al2 O3 . |
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| Keywords: | NiCoCrAlY / Al2 O3 composite coating plasma spray oxidation resistance |
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