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| 1 | Oxidation and hot corrosion behaviors of HVAF-sprayed conventional and nanostructured NiCrC coatings显示文摘The oxidation and hot corrosion behaviors of HVAF-sprayed conventional and nanostructured NiCrC coatings were studied.The oxidation experiment was conducted in air,and the hot corrosion was conducted in the Na2SO4-30%K2SO4 environment, in the temperature range of 550-750℃for periods up to 160 h.The corrosion kinetics was tested with the thermogravimetric method. The corrosion products were characterized by scanning electron microscopy(SEM),energy dispersive X-ray spectroscopy(EDX)and X-ray diffractometry(XRD).As indicated by the results,both types of coatings possess high corrosion resistance,especially the nanostructured NiCrC coating.The enhanced grain boundary diffusion in the nanostructured coating not only promotes the formation of a denser Cr2O3 scale with a higher rate,but also helps to mitigate the Cr depletion at the metal/scale interface.The less porosity of the nanostructured coating is also thought to be beneficial to the anti-corrosion properties. | 陶凯 周香林 崔华 张济山 | 2009 | 中国有色金属学会会刊:英文版2009，19，5： | 4 |
| 2 | 超音速火焰喷涂NiCrC涂层的滑动摩擦磨损行为显示文摘采用空气助燃超音速火焰(HVAF)喷涂技术,分别以相同成分的气雾化合金粉体和低温球磨纳米晶合金粉体作为喂料,制备出高质量的耐磨耐蚀粗晶和纳米晶NiCrC合金涂层。利用SRV摩擦磨损试验机、表面形貌仪和扫描电镜等设备对两种涂层和45钢试样的滑动摩擦磨损行为进行了对比研究。结果表明:在载荷为10~30 N的无润滑剂常温滑动摩擦条件下,两种涂层具有较为接近的滑动摩擦系数,但纳米晶NiCrC涂层的抗磨损性能远优于常规粗晶涂层。三种测试材料都呈现出磨粒磨损和粘着磨损的特征,随着载荷的增加,磨损程度逐渐加剧,同时粘着磨损的特征更加突出。此外,两种涂层材料在磨损过程中都出现了颗粒部分或整体剥落的现象,加剧了涂层的磨损程度。 | 陶凯 于慎君 王继生 周香林 崔华 张济山 | 2012 | 材料热处理学报2012，33，5： | 2 |
| 3 | HVAF喷涂La_(2)O_(3)改性WC-20Cr_(3)C_(2)-11NiMo涂层的耐磨耐蚀性能显示文摘为进一步提升高质量WC涂层的耐磨性、耐海水腐蚀性和耐海水气蚀性。采用大气超音速火焰喷涂(HVAF)在0Cr13Ni5Mo基体上制备稀土La_(2)O_(3)改性WC-20Cr_(3)C_(2)-11NiMo涂层。通过显微硬度测试、平面孔隙测试、摩擦磨损实验、电化学实验和模拟海水超声波气蚀实验,测试涂层的显微硬度、孔隙率、摩擦因数、摩擦磨损性能、耐海水腐蚀性能和耐海水气蚀性能,分析La_(2)O_(3)对WC-20Cr_(3)C_(2)-11NiMo涂层耐磨耐蚀性能的影响。结果表明,改性后的涂层显微硬度提升到1400 HV0.2左右,平均孔隙率降低约48.6%;涂层磨损质量降低约33%,摩擦因数降低约30%,摩擦磨损表面微凹坑和微裂纹明显减少;电化学自腐蚀电位明显右移,电化学自腐蚀电流密度明显减小;涂层的气蚀质量损失减少约20%,气蚀坑洞明显减少和变小。HVAF喷涂La_(2)O_(3)改性后的WC-20Cr_(3)C_(2)-11NiMo涂层硬度略微提升,致密性、耐磨性、耐海水腐蚀性和耐海水气蚀性得到明显提升,除表面疲劳磨损外,表面摩擦磨损机理从严重磨粒磨损转变为轻微磨粒磨损,气蚀机理主要为流体冲击波侵蚀。 | 张凯 刘伟 张磊 赵坚 伏利 陈小明 | 2021 | 粉末冶金材料科学与工程2021，26，1： | 1 |
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