| 复合改性处理对AZ91镁合金表面结构和耐蚀性能的影响 |
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| 引用本文： | 王铁旦,刘洪喜,林波,孟春蕾,蒋业华,周荣锋.复合改性处理对AZ91镁合金表面结构和耐蚀性能的影响[J].材料热处理学报,2011,32(5). |
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| 作者姓名： | 王铁旦 刘洪喜 林波 孟春蕾 蒋业华 周荣锋 |
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| 作者单位： | 1. 昆明理工大学分析测试中心,云南,昆明,650093
2. 昆明理工大学材料科学与工程学院,云南,昆明,650093 |
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| 基金项目： | 国家自然基金(50671045); 云南省自然基金(2008ZC021M); 昆明理工大学分析测试基金(2009-021) |
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| 摘 要： | 为改善AZ91镁合金的耐蚀性能,对其表面进行了固溶时效和氮铝(N+Al)双离子注入复合改性处理。通过X射线衍射(XRD)、俄歇电子能谱(AES)、电化学综合测试系统、显微硬度计分析比较了处理前后试样的表面结构、元素浓度-深度分布、抗腐蚀性能和显微硬度。XRD结果表明,双离子共注后AZ91镁合金表面改性层由Mg、Al12Mg17、MgAl2O4、AlN等物相组成,且Mg和Al12Mg17衍射峰位和强度发生了明显改变。AES分析发现,表面存在约30 nm由Mg、Al、O等元素组成的改性层,注入层深度达到130 nm。双离子共注后试样的显微硬度较基体和固溶时效时分别提高了27.1%和10.4%。在3.5%饱和NaCl溶液中,双离子共注入试样的极化电阻分别为基体和固溶时效试样的21.7倍和9.1倍,腐蚀电流密度降为基体的1/10。相同腐蚀条件下的双离子共注入试样表面只产生了少量腐蚀斑,而基体和固溶时效试样表面却出现了大量的腐蚀坑。
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| 关 键 词： | AZ91镁合金 双离子注入 固溶时效 耐蚀性能 |
Effect of surface modification on microstructure and corrosion resistance of AZ91 magnesium alloy by duplex ion implantation |
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| WANG Tie-dan,LIU Hong-xi,LIN Bo,MENG Chun-lei,JIANG Ye-hua,ZHOU Rong-feng.Effect of surface modification on microstructure and corrosion resistance of AZ91 magnesium alloy by duplex ion implantation[J].Transactions of Materials and Heat Treatment,2011,32(5). |
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| Authors: | WANG Tie-dan LIU Hong-xi LIN Bo MENG Chun-lei JIANG Ye-hua ZHOU Rong-feng |
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| Affiliation: | WANG Tie-dan1,LIU Hong-xi2,LIN Bo2,MENG Chun-lei2,JIANG Ye-hua2,ZHOU Rong-feng1(1.Research Center for Analysis and Measurement,Kunming University of Science and Technology,Kunming 650093,China,2.Faculty of Materials Science and Engineering,China) |
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| Abstract: | In order to improve corrosion resistance of AZ91 magnesium alloy,solid solution and aging treatment and N/Al duplex ion implantation was conducted on the magnesium alloy surface.Microstructure,element distribution,corrosion resistance and hardness of the surface-modified alloy were analyzed by means of XRD,AES,electrochemical testing and micro-hardness measurement.XRD results show that the surface modification layer consists of Mg,Al12Mg17,MgAl2O4 and AlN phase,the diffraction peak position and intensity of... |
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| Keywords: | duplex ion implantation AZ31 magnesium alloy corrosion resistance mechanical property |
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