摘要
非晶态合金是远离平衡态、结构无序的固体物质,其原子是长程无序的,不存在晶体材料的晶界、偏析等缺陷,表现出各向同性,组织结构均一,因此具有髙硬度、优良的耐磨、耐腐蚀性能。通过超音速火焰喷涂(HVOF)制备了一种元素组成为Fe51.1Cr18.1Mo30.8的非晶涂层,采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)、显微硬度仪、磨粒磨损试验机等对涂层的微观形貌、结构特征、元素组成、显微硬度以及耐磨损性能进行了研究。结果表明,涂层孔隙率较低(约1.2%),非晶相含量为94.8%,硬度为1159 HVo.2,远高于316L不锈钢基体,涂层同时也具有比基体更好的耐磨性能。通过同步热分析仪(DSC)进行特征温度表征和热稳定性分析。结果表明,涂层具有良好的热稳定性。通过电化学工作站分析了非晶涂层在不同介质中的钝化行为,并与不锈钢进行对比。结果表明,与不锈钢相比,非晶涂层具有钝化区间宽,抗钝化膜破裂能力强的特点。
Amorphous alloys are solid materials far from equilibrium and disordered in structure.Their atoms do not have long-range order,and there are no defects such as grain boundaries and segregation of crystal materials.They exhibit homogeneity and uniform structure,so they have high hardness,excellent wear and corrosion resistance.An amorphous coating of elemental composition Fe5i.iCr18.^030.8 was prepared by high velocity oxygen fuel spraying(HVOF).X-ray diffraction(XRD),scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS),micro-hardness tester and abrasive wear tester were used to study the microstructure,structural characteristics,elemental composition,microhardness and wear resistance of the coating.The results show that the coating has a low porosity(about 1.2%),an amorphous phase content of 94.8%,and a hardness of 1159 HV0.2,which is much higher than the 316L stainless steel substrate.The coating also has better wear resistance than 316L stainless steel substrate.Characteristic temperature characterization and thermal stability analysis were performed by differential scanning calorimeter(DSC).The results show that the coating has good thermal stability.The passivation behavior of amorphous coatings in different media was analyzed by electrochemical workstation and compared with stainless steel.The results show that compared with stainless steel,the amorphous coating has the characteristics of wide passivation interval and strong resistance to breakage of passivation film.
作者
杨曦
马文
韩继鹏
黄威
李英杰
杨挺
张景新
刘颖
YANG Xi;MA Wen;HANJipeng;HUANG Wei;LI Yingji;YANG Tin;ZHANG Jingxin;LIU Ying(Inner Mongolia University of Technology,Hohhot 010051,Inner Mongolia,China;Inner Mongolia Key Laboratory of Thin Film and Coatings,Hohhot 010051,Inner Mongolia,China;Inner Mongolia Boiler and Pressure Vessel Inspection and Research Institute,Hohhot 010020,Inner Mongolia,China)
出处
《陶瓷学报》
CAS
北大核心
2019年第5期619-623,共5页
Journal of Ceramics
基金
国家自然科学基金(51462026、51672136)
关键词
HVOF
非晶涂层
耐磨耐腐蚀
钝化
HVOF
amorphous coating
wear and corrosion resistance
passivation
