ZrO_2溶胶对Al-Si合金表面微弧氧化陶瓷层形成过程及性能的影响
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摘要
为了提高Al-12Si合金在高温环境下的使用寿命,文中在外加ZrO_2溶胶诱导阳极放电的基础上,采用扫描电子显微镜和X射线衍射仪对涂层微观结构和物相进行分析,运用涡流测厚仪、自制的隔热温差测量装置和测量抗热震性的仪器对其厚度、隔热性能及抗热震性能进行测试.结果表明:微弧氧化层主要相成分为t-ZrO_2、α-Al_2O_3和SiO_2.ZrO_2溶胶显著提高了膜层的致密度和结合性,有效减弱了Si元素对PEO成膜的抑制作用,涂层厚度增大.ZrO_2溶胶改性的涂层具有良好的隔热性能和热冲击性能.
The study is aimed to improve the service life of Al-12 Si alloy under high temperature condition.Based on ZrO_2 sol induce cathode discharge,PEO ceramic layer on the surface of Al-Si alloy was prepared by Plasma Electrolysis Oxidation.The surface and cross-section morphology and phase composition of the ceramic layer were observed with an SEM and an XRD.Its thickness was measured with an eddy current thickness gauge,and its heat insulating properties and thermal shock resistance were measured with a self-made heat insulation test device and thermal shock equipment.The results show that the main phase of the coating is t-ZrO_2,α-Al_2O_3 and SiO_2.ZrO_2 sol can increase the density and improve the binding performance of the coatings significantly,effectively weakening the inhibiting effect of Si element on PEO process.The ceramic coatings formed in solutions with ZrO_2 sol possesses good heat insulating performance and thermal shock resistance.
The study is aimed to improve the service life of Al-12 Si alloy under high temperature condition.Based on ZrO_2 sol induce cathode discharge,PEO ceramic layer on the surface of Al-Si alloy was prepared by Plasma Electrolysis Oxidation.The surface and cross-section morphology and phase composition of the ceramic layer were observed with an SEM and an XRD.Its thickness was measured with an eddy current thickness gauge,and its heat insulating properties and thermal shock resistance were measured with a self-made heat insulation test device and thermal shock equipment.The results show that the main phase of the coating is t-ZrO_2,α-Al_2O_3 and SiO_2.ZrO_2 sol can increase the density and improve the binding performance of the coatings significantly,effectively weakening the inhibiting effect of Si element on PEO process.The ceramic coatings formed in solutions with ZrO_2 sol possesses good heat insulating performance and thermal shock resistance.
引文
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[16]王文琴.纳米TiO2改性镁合金微弧氧化工艺的研究[D].长春:吉林大学,2010.WANG Wenqin.Investigation on Technology of Micro-arc Oxidation of Magnesium Alloy Modified by Nano-TiO2[D].Changchun:Jilin University,2010.(in Chinese)
[17] WANG P,LI J P,GUO Y C,et al.The Formation Mechanism of the Composited Ceramic Coating with Thermal Protection Feature on an Al,12Si Piston Alloy via a Modified PEO Process[J].Journal of Alloys and Compounds,2016,682:357.
[2] CHO K T,YOO S,LIM K M,et al.Effect of Si Content on Surface Hardening of Al-Si Alloy by Shot Peening Treatment[J].Journal of Alloys and Compounds,2011,509(S1):S265.
[3]潘璋,董选普,黄齐文.ZL104铝合金等离子表面重熔处理[J].铸造,2012,61(3):262.PAN Zhang,DONG Xuanpu,HUANG Qiwen.Plasma Surface Remelting Treatment of ZL104Aluminum Alloy[J].Foundry,2012,61(3):262.(in Chinese)
[4] MOON S,JEONG Y.Generation Mechanism of Microdischarges During Plasma Electrolytic Oxidation of Al in Aqueous Solutions[J].Corrosion Science,2009,51(7):1506.
[5]解立川,彭超群,王日初,等.高硅铝合金电子封装材料研究进展[J].中国有色金属学报,2012,22(9):2578.XIE Lichuan,PENG Chaoqun,WANG Richu,et al.Research Progress of High Aluminum-silicon Alloy in Electronic Packaging[J].The Chinese Journal of Nonferrous Metals,2012,22(9):2578.(in Chinese)
[6]郭巧琴,李建平,夏峰,等.铸造Al-14Si-5Cu-3Ni-1Mg合金微弧氧化陶瓷层的结构与性能[J].特种铸造及有色合金,2009,29(5):471.GUO Qiaoqin,LI Jianping,XIA Feng,et al.Microstructure and Properties of the Ceramic Coating Formed by Micro-arc Oxidation on a Cast Hypereutectic Aluminum Alloy[J].Special Casting&Nonferrous Alloys,2009,29(5):471.(in Chinese)
[7]谭晓明,杨芳菲,王刚,等.铸铝合金不同厚度膜层微弧氧化防腐蚀性能试验研究[J].装备环境工程,2012,9(3):62.TAN Xiaoming,YANG Fangfei,WANG Gang,et al.Experimental Study on Corrosion Resistance of Different Thickness Micro-arc Oxidation Film of Cast Aluminum Alloy[J].Equipment Environmental Engineering,2012,9(3):62.(in Chinese)
[8]薛文斌,华铭,施修龄,等.铸造铝合金微弧氧化膜的生长动力学及耐蚀性能[J].硅酸盐学报,2007,35(6):731.XUE Wenbin,HUA Ming,SHI Xiuling,et al.Growth Kinetics of Microarc Oxidation Films on Cast Aluminum Alloy and Their Corrosion Resistance[J].Journal of the Chinese Ceramic Society,2007,35(6):731.(in Chinese)
[9]罗胜联,周海晖,陈金华,等.ZL系列铸铝合金的微弧氧化[J].中国有色金属学报,2002,12(3):491.LUO Shenglian,ZHOU Haihui,CHEN Jinhua,et al.Microarc Oxidation of ZL Cast Aluminum Alloys[J].The Chinese Journal of Nonferrous Metals,2002,12(3):491.(in Chinese)
[10]侯朝辉,旷亚非,周海晖,等.铸铝合金微弧氧化工艺研究[J].电镀与精饰,2001,23(5):5.HOU Zhaohui,KUANG Yafei,ZHOU Haihui,et al.Study on the Microarc Oxidation Technology of Cast Aluminum[J].Platting and Finishing,2001,23(5):5.(in Chinese)
[11] JIN F Y,CHU P K,XU G D,et al.Structure and Mechanical Properties of Magnesium Alloy Treated by Micro-arc Discharge Oxidation Using Direct Current and High-frequency Bipolar Pulsing Modes[J].Materials Science&Engineering:A,2006,435(11):123.
[12] WANG P,LI J P,GUO Y C,et al.Effects of Yttrium Ion on Formation Mechanism of ZrO2-Y2O3 Ceramic Coatings Formed by Plasma Electrolytic Oxidation on Al-12Si Alloy[J].Journal of Wuhan University of Technology(Materials Science Edition),2014,29(5):1044.
[13] WANG P,WANG G,LI J P,et al.Electrochemical Corrosion Behavior of Diphase Ceramic Coating Prepared by PEO Process on Mg-9Gd-3Y Alloy[J].Transactions of Materials&Heat Treatment,2014,35(10):189.
[14]王萍,韩婧,赵玉厚,等.ZrO2纳米颗粒对Al-12.5%Si合金PEO陶瓷层微观形貌及热防护性能的影响[J].稀有金属材料与工程,2017,46(5):1346.WANG Ping,HAN Jing,ZHAO Yuhou,et al.Effects of ZrO2 Nano-particles on Properties of PEO Ceramic Coating on Al-12.5%Si Alloy[J].Rare Metal Materials and Engineering,2017,46(5):1346.(in Chinese)
[15]王少青.阴极微弧沉积制备铝合金热障涂层及数值模拟[D].西安:西安工业大学,2013.WANG Shaoqing.Cathodic Micro-arc Deposition Aluminum Alloy Thermal Barrier Coatings and Numerical Simulation[D].Xi’an:Xi’an Technological University,2013.(in Chinese)
[16]王文琴.纳米TiO2改性镁合金微弧氧化工艺的研究[D].长春:吉林大学,2010.WANG Wenqin.Investigation on Technology of Micro-arc Oxidation of Magnesium Alloy Modified by Nano-TiO2[D].Changchun:Jilin University,2010.(in Chinese)
[17] WANG P,LI J P,GUO Y C,et al.The Formation Mechanism of the Composited Ceramic Coating with Thermal Protection Feature on an Al,12Si Piston Alloy via a Modified PEO Process[J].Journal of Alloys and Compounds,2016,682:357.