引用本文:曹玉霞， 黄传兵， 杜令忠， 张伟刚.hBN含量对NiCr/Cr3C2-hBN复合涂层抗热震性能和氧化性能的影响[J].中国表面工程,2015,28(3):17~22
CAO Yuxia, HUANG Chuanbing, DU Lingzhong, ZHANG Weigang.Effects of hBN Content on Thermal Shock Resistance and Oxidation Properties of NiCr/Cr3C2-hBN Composite Coatings[J].China Surface Engineering,2015,28(3):17~22
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hBN含量对NiCr/Cr3C2-hBN复合涂层抗热震性能和氧化性能的影响
曹玉霞， 黄传兵， 杜令忠， 张伟刚1,2,3
1. 唐山学院 环境与化学工程系;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;3. 唐山市微纳米材料制备及应用重点实验室
摘要:
为了提高NiCr/Cr3C2复合涂层的摩擦性能，在涂层中加入了hBN作为固体润滑剂，研究了hBN含量对涂层抗热震性能和氧化性能的影响。采用大气等离子喷涂技术制备了hBN含量分别为0%、2.5%、5%、10%和20%的NiCr/Cr3C2hBN复合涂层，并研究了复合涂层在700、800和850 ℃的抗热震性能和在850 ℃的恒温氧化性能。结果表明：NiCr/Cr3C2hBN复合涂层呈层状结构，各层之间结合良好；所有涂层在700、800和850 ℃水淬10次均未出现明显的裂纹和脱落现象，涂层抗热震性能均良好。涂层的氧化增重随着hBN含量的增加逐渐增大，96 h后NiCr/Cr3C220%hBN涂层氧化非常严重。在850 ℃时，所有涂层的氧化动力学曲线均遵循抛物线规律。
关键词:  NiCr/Cr3C2hBN  复合涂层  大气等离子喷涂  氧化  抗热震
DOI：10.11933/j.issn.1007-9289.2015.03.003
分类号:
基金项目:
Effects of hBN Content on Thermal Shock Resistance and Oxidation Properties of NiCr/Cr3C2-hBN Composite Coatings
CAO Yuxia, HUANG Chuanbing, DU Lingzhong, ZHANG Weigang1,2,3
1. Department of Environmental and Chemical Engineering, Tangshan College, Tangshan 063000, Hebei;2. State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190;3. Key Laboratory of Micronano Material Preparation and Application of Tangshan, Tangshan 063000, Hebei
Abstract:
In order to improve the tribological properties of the NiCr/Cr3C2 composite coatings, the hBN was added into the coatings as lubrication. The effects of hBN content on the thermal shock resistance and oxidation properties of the coatings were investigated. The NiCr/Cr3C2hBN composite coatings with 0%, 2.5%, 5%, 10% and 20% of hBN content were prepared by atmospheric plasma spray(APS) technology. The thermal shock resistance at 700, 800, and 850 ℃ and the oxidation kinetic curve at 850 ℃ of the APS sprayed NiCr/Cr3C2hBN composite coatings were investigated by muffle furnace. The results show that: the NiCr/Cr3C2hBN composite coatings consist of elongated lamellae and exhibit excellent tensile strength. The cracks and spallings are not observed after water quenching ten times at 700, 800 and 850 ℃. All the composite coatings exhibit excellent thermal shock resistance property at 700, 800 and 850 ℃.The weight gain of the coatings increase with the increase of hBN content. The NiCr/Cr3C220%hBN coatings are seriously oxidized after 96 h. At 850 ℃, the oxidation kinetics curves of the coatings all basically follow the parabola law.
Key words:  NiCr/Cr3C2hBN  composite coating  atmospheric plasma spray(APS)  oxidation  thermal shock resistance
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