| 高铝青铜粉体超音速等离子喷涂层感应重熔后的组织及性能 |
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| 引用本文： | 路阳, 邓刚, 杨效田, 郭文俊, 施晓雨. 高铝青铜粉体超音速等离子喷涂层感应重熔后的组织及性能[J]. 工程科学学报, 2014, 36(3): 333-338. DOI: 10.13374/j.issn1001-053x.2014.03.009 |
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| 作者姓名： | 路阳 邓刚 杨效田 郭文俊 施晓雨 |
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| 作者单位： | 1.兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室, 兰州 730050 |
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| 基金项目： | 国家自然科学基金资助项目;科技部国际合作交流项目;甘肃省有色金属新材料省部共建国家重点实验室开放基金资助项目;兰州理工大学博士基金 |
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| 摘 要： | 为了改善涂层的组织和性能，对超音速等离子喷涂技术制备的高铝青铜涂层进行高频感应重熔处理，研究重熔后涂层的微观组织结构特征和界面结合状态.感应重熔前涂层具有层流状组织特点，含有少量氧化渣、孔隙及未完全熔融颗粒，涂层与基体间以机械结合为主.感应重熔能消除未熔颗粒和夹杂，使组织致密、均匀，组织的层流特征弱化，孔隙率有所下降.基体元素和涂层元素相互扩散，在界面形成一条明显的白亮带，呈冶金结合状态，结合牢固，涂层的结合性能有所改善.重熔后扩散带和涂层表面的硬度较高，界面结合强度也由重熔前的25.110提升至83.358 MPa.
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| 关 键 词： | 青铜 涂层 等离子喷涂 感应加热 重熔 |
| 收稿时间： | 2012-12-29 |
Microstructure and properties of high-aluminum bronze coatings after induction remelting prepared by supersonic plasma spraying |
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| LU Yang, DENG Gang, YANG Xiao-tian, GUO Wen-jun, SHI Xiao-yu. Microstructure and properties of high-aluminum bronze coatings after induction remelting prepared by supersonic plasma spraying[J]. Chinese Journal of Engineering, 2014, 36(3): 333-338. DOI: 10.13374/j.issn1001-053x.2014.03.009 |
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| Authors: | LU Yang DENG Gang YANG Xiao-tian GUO Wen-jun SHI Xiao-yu |
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| Affiliation: | 1.State Key Lab of Gansu Advanced Non-ferrous Materials, Lanzhou University of Technology, Lanzhou 730050, China |
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| Abstract: | By field exposure test, atmospheric corrosion tests of AZ31 magnesium alloy were conducted in Xisha Islands for 4 a. The surface and cross-section morphologies of corrosion products as well as the corrosion morphologies of the alloy after removing corrosion products were observed by scanning electron microscopy. Energy dispersive X-ray spectroscopy and X-ray diffraction analysis were used to obtain the element content and phase composition of corrosion products. The results indicate that the alloy undergoes severe corrosion. The average corrosion rate is 11.95μm·a-1. Cl- and CO2 play important roles in the corrosion process. The Cl-—containing absorbed electrolyte layers will destroy the oxidation film and induce anodic dissolution of the alloy. While CO2 dissolved in the absorbed electrolyte layers tends to neutralize the alkali formed in the cathodic area and reacts with Mg (OH) 2 to form Mg5(CO3)4(OH)2·xH2O. The surface corrosion products restrict the transport of CO2 and Cl- to the surface of the alloy, so the inner layer of corrosion products is mainly composed of Mg(OH) 2. |
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| Keywords: | bronze coatings plasma spraying induction heating remelting |
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