摘要
通过表面机械研磨处理(SMAT)在LY12CZ铝合金表面制备表面纳米化(SNC)过渡层,再采用微弧氧化(MAO)技术对纳米晶过渡层进行微结构重构,设计制备出纳米化-微弧氧化(SNC-MAO)复合涂层,并对比研究了表面纳米化、微弧氧化及纳米化-微弧氧化复合处理对基体铝合金拉伸性能的影响。结果表明,微弧氧化处理使基体铝合金的屈服强度和抗拉强度减小,而纳米化-微弧氧化复合处理则增加了基体铝合金的屈服强度和抗拉强度。在拉伸伸长率8%的条件下,相同厚度的纳米化-微弧氧化复合涂层比微弧氧化涂层具有更好的抗拉伸破坏能力,表现出更好的膜基结合性能。
A duplex process was designed to modify the alloy surface using surface mechanical attrition treatment（SMAT）prior to microarc oxidation（MAO）.A surface nanocrystalline（SNC）layer was formed on the surface of Al alloy by SMAT,on which a ceramic coating grew by MAO,finally the SNC-MAO composite coating are fabricated.The tensile properties of the SMATed alloy,MAO coating and SNC-MAO composite coating were comparatively evaluated.Experimental results show that the yield strength and tensile strength of the substrate Al alloy are reduced after MAO treatment,while those of SNC-MAO treated samples are improved due to the introduction of SMAT pre-treatment.When the elongation is 8%,SNC-MAO coating shows better tensile and adhesion properties compared with MAO coating with the same thickness.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2016年第3期15-20,共6页
Journal of Materials Engineering
基金
国家自然科学基金(51201008)
教育部博士点科研基金(20120006120043)
高等学校学科创新引智计划(B12012)
关键词
铝合金
表面纳米化
表面机械研磨处理
微弧氧化
拉伸性能
aluminum alloy
surface nanocrystallization
surface mechanical attrition treatment
microarc oxidation
tensile property
