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| 1 | Investigation of mutual effects among additives in electrolyte for plasma electrolytic oxidation on magnesium alloys显示文摘Plasma electrolytic oxidation(PEO)coatings were prepared on AZ91D magnesium alloys in alkaline silicate-based electrolyte with and without additives.The mutual effects among additives including TiC particles,dispersant polyethylene glycol 6000(PEG6000)and anionic surfactant sodium dodecyl sulfate(SDS)were studied based on orthogonal experiment.The content and distribution of TiC deposited in the coatings were measured by EPMA and EDS.The thicknesses,phase compositions,microstructures and corrosion resistances of the codlings were cAarnined by using TT260 eddy current tuickncss gage,XRD,SEM and clcctrochcniical test,respectively.The results show that the experiment design of this study is the key to study the mutual effects among these additives.Each additive and their interactions all remarkably influence TiC content and corrosion resistance of the coatings.Smaller size TiC is much easier to migrate towards the anode,and the interaction between PEG6000 and SDS both effectively prevents its agglomeration and increases the number of its negative surface charges,which further increase the migration rate and the deposited uniformity of TiC and make TiC have more opportunity to deposit in the discharge channel.Thus,when smaller size TiC,PEG6000 and SDS are all added into the electrolyte,they could improve the anti-corrosion property of the coating to the largest extent attributed to higher TiC content and the densest microstructure of the coating. | Lingyun An Ying Ma Le Sun Zhanying Wang Sheng Wang | 2020 | Journal of Magnesium and Alloys2020，8，2： | 9 |
| 2 | 微纳米颗粒添加剂在镁合金微弧氧化涂层中的应用研究现状显示文摘镁合金由于其密度低等优势受到研究者的广泛关注。然而,镁自身化学性质活泼且其表面自然生成的氧化膜疏松多孔,无法有效保护镁基体,严重的腐蚀、磨损等问题限制了镁合金在工业中的应用,而对镁合金进行表面改性可进一步拓宽镁合金的使用范围。微弧氧化(MAO)技术作为一种有效的表面改性技术,可在镁合金表面制备耐磨、耐蚀等特性的陶瓷涂层。电解液的化学成分被认为是影响镁合金陶瓷涂层性能的重要因素之一,通过加入微纳米颗粒添加剂调整电解液的化学成分可获得性能更加优异的陶瓷涂层。综述了近年来微纳米颗粒添加剂对镁合金微弧氧化陶瓷涂层的微观结构、涂层厚度、相组成的影响,以及含有微纳米颗粒添加剂涂层腐蚀行为和磨损行为的变化,简要介绍了微纳米颗粒添加剂嵌入微弧氧化涂层的机制,并展望了该领域未来的发展方向。 | 雍家惠 李宏战 李争显 王毅飞 耿娟娟 | 2021 | 稀有金属2021，45，10： | 5 |
| 3 | Corrosion resistance and superhydrophobicity of one-step polypropylene coating on anodized AZ31 Mg alloy显示文摘Superhydrophobic coatings have been considerably used in corrosion and its protection of metallic Mg.And the comprehensive performance(hydrophobicity,bonding strength,and corrosion resistance,etc.)of the top coating may be highly dependent on the physical and chemical properties of the primer or under coat.Herein,an integrated superhydrophobic polypropylene(PP)coating was fabricated on the micro-arc oxidized Mg substrate via one-step dipping.Surface morphologies and chemical compositions of the composite coating were examined through Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction(XRD),and field-emission scanning electron microscopy(FESEM)together with X-ray photoelectron spectroscopy(XPS).The surface wettability of the coating was determined by contact angle and sliding angle.The corrosion-resistant performance was evaluated via electrochemical and immersion measurements.The results showed that the hybrid coating possessed micron-scaled granular structure on the surface with a high water contact angle of 167.2±0.8°and a low water sliding angle of 2.7±0.5°.The corrosion resistance of superhydrophobic coating was obviously enhanced with a low corrosion current density of 8.76×10^(−9)A/cm^(2),and the coating still maintained integrity after 248 h of immersion in 3.5wt%NaCl aqueous solution.The MAO coating provides better adhesion of PP to the surface.Hence,the superhydrophobic coating exhibited superior bonding strength,corrosion resistance and durability. | Zhao-Qi Zhang Li Wang Mei-Qi Zeng Rong-Chang Zeng Cun-Guo Lin Zhen-Lin Wang Dong-Chu Chen Qiang Zhang | 2021 | Journal of Magnesium and Alloys2021，9，4： | 5 |
| 4 | Micro and nano-enabled approaches to improve the performance of plasma electrolytic oxidation coated magnesium alloys显示文摘Magnesium(Mg)and its alloys have become a hot research topic in various industries owing to the specific physical and chemical properties.However,high corrosion rate is considered the key lifetime-limiting.Plasma electrolytic oxidation(PEO)method is a simple strategy to deposit an oxide layer on the surface of light metals such as magnesium alloys,to control corrosion rate and promote some other properties,depending on their performances.Nevertheless,their features including their micropore size,distribution,and interconnectivity,and microcracks have not been improved to an acceptable level to support long-term performances of the magnesium-based substrates.Studies have introduced micro/nano-enabled approaches to enhance various properties of PEO coatings such as corrosion resistance,tribological properties,self-healing ability,bioactivity,biocompatibility,antibacterial properties,or catalytic performances.These strategies consist of incorporating of micro and nanoparticles into the PEO layers to produce multi-functional surfaces or the formation of multi-layered coatings to cover the defects of PEO coatings.In this perspective,the present paper aims to overview various nano/micro-enabled strategies to promote the properties of PEO coatings on magnesium alloys.The main focus is given to the functional changes that occurred in response to the incorporation of various types of nano/micro-structures into the PEO coatings on magnesium alloys. | Safoora Farshid Mahshid Kharaziha | 2021 | Journal of Magnesium and Alloys2021，9，5： | 2 |
| 5 | ZrO_(2)颗粒含量对2A12铝合金微弧氧化膜耐蚀性的影响显示文摘为了提高2A12铝合金微弧氧化膜层的耐蚀性,利用非对称双极性脉冲电源制备具有不同纳米ZrO_(2)颗粒含量的微弧氧化复合膜层,研究了纳米ZrO_(2)颗粒对2A12铝合金微弧氧化膜层耐蚀性的影响.采用扫描电子显微镜、能谱仪、X射线衍射仪、电化学工作站等仪器对复合膜层进行分析测试.结果表明:当电解液中加入1 g/L的ZrO_(2)颗粒时,复合膜层中的自腐蚀电流密度最小,极化电阻值最高,耐蚀性最好;当复合膜层中ZrO_(2)颗粒含量由2 g/L增加到3 g/L时,复合膜层中形成的裂纹明显增多,复合膜层的耐蚀性下降. | 张艳 杭佳宁 张伟 刘公召 | 2022 | 沈阳工业大学学报2022，44，6： | 0 |
| 6 | 基于微弧氧化技术的镁合金耐磨减摩复合膜层研究现状显示文摘轻质化是当今金属材料发展的一大趋势,各领域越来越多采用镁合金作为结构或功能材料,而微弧氧化技术可以改善镁合金表面摩擦学性能,但由于硬度低和易磨损等性质,限制了镁合金的使用范围和寿命。本文首先论述基于微弧氧化技术制备镁合金耐磨减摩复合膜层的研究现状,其次将复合制备技术分为微弧氧化直接复合技术(在电解液中添加各类微纳米颗粒制备复合膜层)和微弧氧化二次复合技术(将微弧氧化和其他表面处理技术结合制备复合膜层),并总结制备工艺及其对复合膜层摩擦学性能的影响,最后对基于微弧氧化技术改善镁合金复合膜层耐磨减摩性能的未来发展进行展望,以供参考。 | 樊志斌 赵丹 李小亮 | 2023 | 中国科技投资2023，，28： | 0 |
| 7 | 镁合金表面含ZrO_(2)微弧氧化复合膜层的研究进展显示文摘镁合金耐蚀性差,极大限制了其在易腐蚀环境中的应用。微弧氧化能够在镁合金表面制备一层类陶瓷氧化膜,能有效提高其耐蚀性。受微弧氧化成膜机理的影响,膜层中往往存在大量孔洞和裂纹;并且通常氧化膜主要由MgO组成,在潮湿或酸性环境中会吸水或溶解,导致膜层的耐蚀性不理想。将具有优良化学稳定性和高硬度的ZrO_(2)引入镁合金微弧氧化膜中,获得主要由ZrO_(2)构成或含ZrO_(2)的氧化膜,同时减少膜层中缺陷,能够提高其对镁合金基体的保护效果。从镁合金微弧氧化电解液、电参数、两步微弧氧化工艺及与其他表面处理技术相结合的4个方面概述了含ZrO_(2)微弧氧化复合膜层的制备工艺、成膜机制及耐蚀性等方面研究的进展,同时分析了各自存在的问题及不足。未来有必要优化制备含ZrO_(2)微弧氧化膜的电解液的组成,以保证其稳定性和有效性,并明确使用过程中电解液各成分的消耗和补充规律。进一步研究两步微弧氧化工艺,获得对镁合金基体有更好保护作用的复合膜层。探索将微弧氧化与其他表面处理技术相结合,综合利用2种技术及膜层的优点。根据ZrO_(2)在不同温度下的结构变化,可以进一步分析微弧氧化过程中的温度场分布和膜层形成机理。 | 唐明奇 辛畅 胡俊华 冯在强 李刚 张伟 | 2023 | 材料保护2023，56，4： | 0 |
| 8 | ZrO_(2)纳米颗粒对PEO涂层微观结构及热物理性能的影响显示文摘目的提高PEO涂层的热物理性能。方法以活塞主流材料——高硅铝合金(ZL109)为基体,在硅酸盐系电解液中,添加不同浓度的ZrO_(2)纳米颗粒,制备一系列ZrO_(2)/Al_(2)O_(3)复合PEO涂层,并通过涡流测厚仪、扫描电子显微镜(SEM)、能谱仪(EDS)及X射线衍射仪(XRD)分析ZrO_(2)纳米颗粒对涂层生长、微观形貌、元素组成及晶相结构的影响规律。利用差式扫描热量仪(DSC)、激光导热仪(LFA)等设备探究各涂层的热物理性能。结果在PEO放电过程中,添加ZrO_(2)纳米颗粒使陶瓷膜两侧的击穿电压下降,当ZrO_(2)的质量浓度达到9 g/L时,击穿电压的下降幅度达30 V。ZrO_(2)能抑制陶瓷层中α-Al_(2)O_(3)晶体的生长,同时受放电能量的影响,涂层中的c-ZrO_(2)结晶度先增高、后降低。当ZrO_(2)的质量浓度为1.5 g/L时,涂层的微观形貌呈大孔嵌套小孔的“蜂巢”结构,并使涂层具有显著的低导热(0.13 W/(K·m))特性。当ZrO_(2)的质量浓度为3 g/L时,涂层表面出现显著的微裂纹,开放型孔洞增加,热扩散系数增大(0.7 mm^(2)/s),热导率最高(0.42 W/(K·m))。结论ZrO_(2)的引入可以显著改变涂层的微观结构和热物理性能,当ZrO_(2)含量控制在一定量时,复合PEO涂层呈封闭型微孔结构,有助于降低涂层的比热容、热导及热扩散系数。 | 李国栋 齐少豹 朱剑威 李志杰 马飞 李光 夏原 | 2022 | 表面技术2022，51，2： | 0 |
| 9 | 原位合成ZrO_(2)/MgO膜层及自修复裂纹研究显示文摘微弧氧化熔融冷却成膜过程出现的裂纹将影响膜层的强韧性和磨损性能。本研究利用ZrO_(2)自身的强韧性,原位合成具有自修复裂纹作用的ZrO_(2)/MgO膜层,研究原位合成的ZrO_(2)对膜层磨损性能的影响。结果表明,微弧氧化原位合成的ZrO_(2)在高温放电通道发生相变产生体积膨胀使得氧化锆界面萌生微裂纹并阻碍裂纹尖端的裂纹扩展,从而实现了膜层裂纹的自修复。通过控制锆源含量实现了对膜层中ZrO_(2)含量的调控,膜层中原位ZrO_(2)含量为32%时,ZrO_(2)/MgO膜层裂纹呈现细小分散化,裂纹密度较传统膜层下降63.4%,摩擦系数减小53.4%,磨损量降低66.7%。研究认为,原位合成的ZrO_(2)在膜层制备过程实现裂纹自修复并有效降低摩擦系数和磨损量,改善ZrO_(2)/MgO膜层表面磨损性能。 | 张震 钱伟峰 李景 陈永楠 郝建民 陈宏 赵秦阳 李宏战 赵永庆 | 2022 | 稀有金属材料与工程2022，51，8： | 0 |
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