温度冲击对不同阳极氧化温度SiC_P/2A12复合材料阳极氧化膜开裂行为的影响  

Effect of temperature shock on cracking behaviors of anodic film on SiC_P/2A12 composites at different anodized temperatures

作　　者：王一博[1] 于美[1] 刘建华[1] 李松梅[1] 杨茗佳 王永平 王蕾 

机构地区：[1]北京航空航天大学材料科学与工程学院空天先进材料与服役教育部重点实验室,北京100083 [2]北京星航机电装备有限公司,北京100074

出　　处：《复合材料学报》2016年第8期1733-1741,共9页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(51271012)

摘　　要：通过己二酸-硫酸工艺制备了SiCP/A1合金（2A12）复合材料阳极氧化膜,研究了不同阳极氧化温度下（15~35℃）制备的SiCP/2A12复合材料阳极氧化膜温度冲击后的开裂行为及耐蚀性能。采用FE-SEM对温度冲击前后SiCP/2A12复合材料阳极氧化膜的微观形貌进行了分析,采用电化学阻抗谱（EIS）研究了冲击前后SiCP/2A12复合材料阳极氧化膜的耐腐蚀性能。结果表明：温度冲击对不同阳极氧化温度制备的SiCP/2A12复合材料阳极氧化膜影响程度不同,随着阳极氧化温度的升高,温度冲击后SiCP/2A12复合材料阳极氧化膜的裂纹密度逐渐增加。阳极氧化温度为25℃时,温度冲击后SiCP/2A12复合材料阳极氧化膜耐蚀性最好。SiCP/2A12复合材料阳极氧化膜的耐温度冲击性能优于2A12铝合金氧化膜。Anodic film on SiCP/Al alloy（2A12）composites was obtained by adipic-sulfuric acid process.The cracking behaviors and corrosion resistance of anodic film on SiCP/2A12 composites which was obtained at different anodized temperature（15-35 ℃）were analyzed after temperature shock.The micro morphology of anodic film on SiCP/2A12 composites was observed by using FE-SEM before and after temperature shock.Electrochemical impedance spectroscope（EIS）was used to study the corrosion resistance of anodic film on SiCP/2A12 composites before and after shock.The results show that the effect of temperature shock on anodic film on SiCP/2A12 composites obtained at different anodized temperatures was different.After treating by temperature shock,the crack density of anodic film on SiCP/2A12 composites gradually increases with the anodizing temperature increasing.The corrosion resistance of anodic film on SiCP/2A12 composites after temperature shock obtained at anodized temperature of 25℃is best.The temperature shock resistance performance of anodic film on SiCP/2A12 composites is superior to that of2A12 aluminium alloy oxidation film.

关 键 词：铝基复合材料 SIC 阳极氧化 温度冲击 耐蚀性 

分 类 号：TB331[一般工业技术—材料科学与工程]