摘要
为进一步提高7075铝合金的表面耐磨性,在硅酸钠、六偏磷酸钠复合电解液中加入不同质量浓度的硝酸铈添加剂,运用微弧氧化技术在其表面原位生长出氧化铝陶瓷膜。采用涂层测厚仪、维氏硬度计、扫描电子显微镜(SEM)、X射线衍射议(XRD)等方法研究了硝酸铈添加剂对陶瓷膜厚度、显微硬度、表面形貌、相组成以及耐磨性的影响。结果表明:陶瓷膜主要由α-Al2O3和γ-Al2O3两相组成,当硝酸铈质量浓度为0.12g/L,陶瓷膜的厚度达到最大,约为18μm;硬度达到最高,约为916HV0.2;致密性最佳;陶瓷膜表现出更好的耐磨性能。
In order to further improve the wear resistance of 7075 aluminum alloy,the ceramic coating was in-situ formed on 7075 aluminum alloy by applying micro-arc oxidation（MAO）technique in sodium silicate and sodium hexametaphosphate solution with different concentration Ce（NO3）3additive.The effects of Ce（NO3）3additive on thickness,hardness,surface morphology,phase composition and wear resistance of ceramic coatings were investigated using the coating thickness meter,micro Vickers hardness measurer,scanning electron microscope（SEM）and X-ray diffraction（XRD）.The results show that the ceramic coating primarily consists ofα-Al2O3andγ-Al2O3.When the Ce（NO3）3concentration is 0.12g/L,the denser ceramic coating possesses better wear resistance with the thickness and hardness reaching the highest up to 18μm and 916HV0.2,respectively.
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
2014年第6期116-121,共6页
China Surface Engineering
基金
广西自然科学基金(2013GXNSFBA019260)
广西信息材料重点实验室自主研究基金(桂科能1210908-202-z)
关键词
微弧氧化
硝酸铈
陶瓷膜
micro-arc oxidation（MAO）
Ce（NO3）3
ceramic coatings
