| 阳极氧化处理增强Al-Li合金胶接板剪切强度的机理 |
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| 引用本文： | 刘兆文,李毅波,黄明辉,汪必升,李剑.阳极氧化处理增强Al-Li合金胶接板剪切强度的机理[J].材料导报,2018,32(18):3181-3184, 3207. |
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| 作者姓名： | 刘兆文 李毅波 黄明辉 汪必升 李剑 |
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| 作者单位： | 中南大学轻合金研究院;中南大学高性能复杂制造国家重点实验室;中南大学机电工程学院 |
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| 基金项目： | 国家自然科学基金(51575535)；中南大学创新驱动计划(2015CX002)；湖南省科技厅项目(2014RS4056)；高性能复杂制造国家重点实验室开放基金(zzyjkt2013-09B) |
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| 摘 要： | 为揭示磷酸阳极氧化处理后Al-Li合金胶接接头剪切强度大幅度增强的机理,分别对其进行机械打磨和磷酸阳极化表面处理,并选用不同的分析仪器对表面处理后的Al-Li合金表面微观形貌、粗糙度、表面润湿性和表面自由能进行测试计算和分析。结果表明,机械打磨后仅在Al-Li合金表面留下纵横交错的沟槽,而磷酸阳极化处理后使得Al-Li合金表面产生了微观粗糙的多孔膜,增加了胶层与合金表面的接触面积,改善了胶质分布的均匀性;磷酸阳极化处理后Al-Li合金表面自由能明显提高,改善了粘接界面的润湿性能。两方面的共同作用,使得胶接界面的抗剪切能力大幅提高。
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| 关 键 词： | Al-Li合金 润湿性 磷酸阳极氧化 表面自由能 |
The Mechanism of Strengthening Shear Strength of Al-Li Alloy Plates by Anodizing |
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| LIU Zhaowen,LI Yibo,HUANG Minghui,WANG Bisheng and LI Jian.The Mechanism of Strengthening Shear Strength of Al-Li Alloy Plates by Anodizing[J].Materials Review,2018,32(18):3181-3184, 3207. |
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| Authors: | LIU Zhaowen LI Yibo HUANG Minghui WANG Bisheng and LI Jian |
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| Affiliation: | Light Alloy Research Institute, Central South University, Changsha 410083,State Key Laboratory of High Performance and Complex Manufacturing, Central South University, Changsha 410083;College of Mechanical and Electrical Engineering, Central South University, Changsha 410083,Light Alloy Research Institute, Central South University, Changsha 410083;State Key Laboratory of High Performance and Complex Manufacturing, Central South University, Changsha 410083;College of Mechanical and Electrical Engineering, Central South University, Changsha 410083,College of Mechanical and Electrical Engineering, Central South University, Changsha 410083 and College of Mechanical and Electrical Engineering, Central South University, Changsha 410083 |
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| Abstract: | In order to reveal the mechanism of the greatly enhanced shear strength of the Al-Li alloy joints after phosphoric acid anodizing treatment, the Al-Li alloys were mechanical polished and anodized in phosphoric acid respectively. And different analytical instruments were used to analyze the Al-Li alloy surface, including micro-structure, roughness, surface wettability and surface free energy. The results showed that mechanical grinding was only leaved crisscrossed of grooves on the surface of the Al-Li alloy plate. However, the surface of the Al-Li alloy was appeared micro-roughened of porous membrane after the anodizing process in phosphoric acid, which increased the contact area between the adhesive layer and the alloy surface, as well as improved the uniformity of the adhesive distribution; the surface free energy of Al-Li alloy was improved obviously after phosphoric acid anodizing, which improved the wettability of the adhesion interface. The adhesion shear strength greatly increased for the co-effect of the two factors. |
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| Keywords: | Al-Li alloy wettability phosphoric acid anodizing surface free energy |
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