SiO_(2)-BNNSs杂化材料对磷酸盐复合涂层高温摩擦学性能的影响  

Effect of SiO_(2)-BNNSs Hybrid Material on High Temperature Tribological Properties of Phosphate Composite Coatings

作　　者：魏文涛 王全龙 王剑宇 王轶遥 李啸 WEI Wentao;WANG Quanlong;WANG Jianyu;WANG Yiyao;LI Xiao(School of Mechanical Engineering,Jiangnan University,Jiangsu Wuxi 214122,China;Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment&Technology,Jiangnan University,Jiangsu Wuxi 214122,China;Jiangsu Micronano Manufacturing Engineering Research Center,Jiangnan University,Jiangsu Wuxi 214122,China)

机构地区：[1]江南大学机械工程学院,江苏无锡214122 [2]江南大学江苏省食品先进制造装备技术重点实验室,江苏无锡214122 [3]江南大学江苏省微纳增减材制造工程研究中心,江苏无锡214122

出　　处：《表面技术》2024年第15期34-44,76,共12页Surface Technology

基　　金：国家自然科学基金(51705202);江苏省自然科学基金(BK20170191);江苏省博士后科研资助计划(2021Z325)。

摘　　要：目的通过在磷酸盐复合涂层中添加二氧化硅杂化氮化硼纳米片材料(SiO_(2)-BNNSs)来提升磷酸盐复合涂层的硬度和耐高温磨损性能。方法以正硅酸四乙酯(TEOS)为硅源,利用溶胶凝胶法制备SiO_(2)-BNNSs杂化材料,并作为纳米增强相加入到涂层中。通过X射线光电子能谱(XPS)、场发射扫描电子显微镜(FE-SEM)和透射电子显微镜(TEM)对SiO_(2)-BNNSs杂化材料的化学组成和微观形貌进行表征。另外,采用喷涂法制备不同含量BNNSs和SiO_(2)-BNNSs的磷酸盐复合涂层,通过高温摩擦磨损试验探究涂层的摩擦磨损行为,对涂层磨痕形貌进行表征,并探讨涂层在高温条件下的磨损机理。结果XPS、SEM和TEM的分析结果表明,SiO_(2)成功修饰在BNNSs表面。SiO_(2)-BNNSs磷酸盐涂层相比零含量BNNSs涂层和纯BNNSs涂层表现得更加均匀致密,400℃条件下,质量分数为0.4%的SiO_(2)-BNNSs涂层硬度高达261.2HV。高温摩擦试验表明,BNNSs和SiO_(2)-BNNSs的加入,可以减轻涂层的磨损现象。同时,温度越高,涂层的耐磨损性能越好,400℃条件下,0.4%SiO_(2)-BNNSs涂层的摩擦因数和磨损率分别为0.48和66.24×10–6mm^(3)/(N·m),耐高温磨损性能表现为最佳。结论SiO_(2)-BNNSs杂化材料的添加可以明显提升磷酸盐复合涂层的耐高温磨损性能。Phosphate composite coatings have excellent properties such as high hardness,wear resistance,corrosion resistance,and high temperature resistance,and the material is environmentally friendly and pollution-free.It is an advanced stainless steel metal surface protection technology.However,with the increasingly harsh service conditions of stainless steel metal components,traditional phosphate coatings have problems such as high porosity and poor wear resistance under high temperature conditions,which limit their application in fields such as marine engineering,petroleum industry,and chemical engineering.Therefore,by adding silica hybrid boron nitride nanosheets(SiO_(2)-BNNSs)into the phosphate composite coating,the high-temperature hardness and high-temperature wear resistance of the phosphate composite coating can be improved.With tetraethyl orthosilicate(TEOS)as the silicon source,SiO_(2)-BNNSs hybrid material was prepared by the sol-gel method,and used as a nano reinforcement phase of the coating.A stainless steel 304 steel plate was cut into square blocks(20 mm×20 mm×2 mm)as the substrates,which were then subject to sandblasting to Sa 2.5,and then ultrasonic cleaning with anhydrous ethanol for 1 hour to remove surface oil and dust.Alumina(Al_(2)O_(3)),zirconia(ZrO_(2)),aluminum vanadium(Bauxite),BNNSs and SiO_(2)-BNNSs reinforcement were mixed in proportion,and then subject to ball milling treatment.The ball milled powder was mixed with aluminum dihydrogen phosphate(AP)binder evenly to produce a coating slurry.According to the spraying method,the coating slurry with different mass fractions after stirring was sprayed onto the surface of the 304 substrates,and then the coating samples were obtained through room temperature and heating curing,respectively.The chemical composition and micro morphology of SiO_(2)-BNNSs hybrid material were analyzed by X-ray photoelectron spectroscopy(XPS),field emission Scanning electron microscope(FE-SEM)and transmission electron microscopy(TEM).In addition,the microhardness of t

关 键 词：氮化硼纳米片 二氧化硅 杂化材料 磷酸盐复合涂层 耐高温磨损性能 

分 类 号：TH117[机械工程—机械设计及理论]