SiC纳米颗粒对TA2微弧氧化涂层组织结构及耐蚀性能的影响机制
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摘要
为提高钛及钛合金防腐蚀、耐磨损等关键服役性能,在TA2表面制备微弧氧化(MAO)陶瓷涂层,研究纳米SiC颗粒的添加对微弧氧化涂层组织结构及耐蚀性能的影响机制。结果表明,基础电解液中SiC的加入能够大幅度提高TA2微弧氧化涂层的厚度,且随着电压的升高,涂层的厚度和表面粗糙度也随之增大,涂层表面的微孔尺寸随着电压的升高而逐渐增大,SiC的加入能够有效地抑制微弧氧化涂层表面裂纹的产生;微弧氧化涂层的物相主要有高温稳定相金红石及锐钛矿,还含有少量的SiC及SiO_2;微弧氧化涂层增加TA2的开路电位及自腐蚀电位,随着处理电压的增加开路电位随着升高;SiC的加入降低了涂层的阳极电流密度,显著提高了微弧氧化涂层的耐蚀性能。
In order to improve the anti-corrosion and anti-wear properties of titanium alloy, a microarc oxidation(MAO) coating was fabricated on the surface of TA2. The influences of SiC nanoparticles on the microstructure and corrosion behavior of MAO coa tings were investigated. The results show that the introduction of SiC nanoparticles into the base electrolyte increases the coating thickness of MAO coating. The thickness, surface roughness and micropore size of the coating increase with the increasing applied voltage. The microcracks in the coating decrease by SiC particles. The phase composition of coatings consists of rutile phase, anatase phase, SiC and SiO_2. The OCP and corrosion potential increase by MAO treatment. The introduction of SiC nanoparticles reduces the anodic current density, thus improving the corrosion property of the microarc oxidation coatings.
In order to improve the anti-corrosion and anti-wear properties of titanium alloy, a microarc oxidation(MAO) coating was fabricated on the surface of TA2. The influences of SiC nanoparticles on the microstructure and corrosion behavior of MAO coa tings were investigated. The results show that the introduction of SiC nanoparticles into the base electrolyte increases the coating thickness of MAO coating. The thickness, surface roughness and micropore size of the coating increase with the increasing applied voltage. The microcracks in the coating decrease by SiC particles. The phase composition of coatings consists of rutile phase, anatase phase, SiC and SiO_2. The OCP and corrosion potential increase by MAO treatment. The introduction of SiC nanoparticles reduces the anodic current density, thus improving the corrosion property of the microarc oxidation coatings.
引文
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[3]Gurrappa I.Materials Characterization[J],2003,51(2-3):131
[4]Gurrappa I,Reddy D V.Journal of Alloys and Compounds[J],2005,390(1-2):270
[5]Codaro E N,Nakazato R Z,Horovistiz A L et al.Materials Science and Engineering A[J],2003,341(1-2):202
[6]Wang Hongyu(王宏宇),Chen Kangmin(陈康敏),Xu Xiaojing(许晓静)et al.Light Metals(轻金属)[J],2005(5):54
[7]Tu Zhenmi(屠振密),Li Ning(李宁),Zhu Yongming(朱永明).Application and Technology on Surface Treatment of Titanium and Titanium Alloys(钛及钛合金表面处理技术和应用)[M].Beijing:National Defense Industry Press,2010
[8]Xue Wenbin(薛文斌),Deng Zhiwei(邓志威),Lai Yongchun(来永春)et al.Heat Treatment of Metals(金属热处理)[J],2000(1):1
[9]Li H,Sun Y Z,Zhang J.Applied Surface Science[J],2015,342:183
[10]Durdu S,Usta M,Berkem A S.Surface and Coatings Technology[J],2016,301:85
[11]Shokouhfar M,Dehghanian C,Montazeri M et al.Applied Surface Science[J],2012,258(7):2416
[12]Shoaei-Rad V,Bayati M R,Zargar H R et al.Materials Research Bulletin[J],2012,47(6):1494
[13]Sharifi H,Aliofkhazraei M,Darband G B et al.Tribology International[J],2016,102:463
[14]Wang Y,Wei D B,Yu J et al.Journal of Materials Science&Technology[J],2014,30(10):984
[15]Li H X,Song R G,Ji Z G.Transactions of Nonferrous Metals Society of China[J],2013,23(2):406
[16]Aliofkhazraei M,Rouhaghdam A S,Shahrabi T.Surface and Coatings Technology[J],2010,205(S1):41
[17]Dzhurinskiy D,Gao Y,Yeung W K et al.Surface and Coatings Technology[J],2015,269:258
[18]Shokouhfar M,Allahkaram S R.Surface and Coatings Technology[J],2016,291:396
[19]Yu L,Cao J H,Cheng Y L.Surface and Coatings Technology[J],2015,276:266