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Investigation of anti-corrosion property of hybrid coatings fabricated by combining PEC with MAO on pure magnesium

Journal of Magnesium and Alloys 2022年第10期10卷 2875-2888页

作者： Le Sun Ying Ma Binfeng Fan Sheng wang zhanying wang State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of TechnologyLanzhou 730050China

Novel hybrid coatings on pure magnesium were prepared by combining plasma electrolytic carburizing(PEC)with micro-arc oxidation(MAO)to further enhance the anti-corrosion property in this *** electron microscopy(SEM)was used to observe the microstructure of the coatings,meanwhile,energy dispersive spectrometry(EDS)and X-ray diffraction(XRD)were separately used to investigate the elemental as well as phase compositions of the *** anti-corrosion property of the coatings was evaluated by potentiodynamic polarization curves as well as electrochemical impedance spectroscopy(EIS).The results show that PEC process is closely related with the effects of adsorption as well as diffusion of the activated carbon atoms,and it can provide a favorable pretreatment surface with predesigned chemical composition to obtain a new kind of phase,namely Si C with superior corrosion resistance and chemical stability,in the following PEC+MAO hybrid ***,PEC preprocessing also can afford an excellent micro-structure to increase the coating thickness as well as to improve the compactness of the PEC+MAO hybrid *** the fabrication process of the PEC+MAO hybrid coatings,an overlapping phenomenon in regard to coating thickness can be observed instead of heaping up layer by *** with both single PEC surface modification layers as well as single MAO coatings,the PEC+MAO hybrid coatings exhibit more superior anti-corrosion ***,the EIS data reveal that the PEC+MAO hybrid coatings can act as an effective protection system to provide relatively excellent long-range anti-corrosion *** also that employing same MAO technique for both single MAO treatment as well as PEC+MAO combining procedure is the key to this research.

关键词： Pure magnesium Plasma electrolytic carburizing Micro-arc oxidation Surface modification layers Hybrid coatings Anti-corrosion property

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Investigation of mutual effects among additives in electrolyte for plasma electrolytic oxidation on magnesium alloys

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Journal of Magnesium and Alloys 2020年第2期8卷 523-536页

作者： Lingyun An Ying Ma Le Sun zhanying wang Sheng wang State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of TechnologyLanzhou 730050China

Plasma electrolytic oxidation(PEO)coatings were prepared on AZ91D magnesium alloys in alkaline silicate-based electrolyte with and without *** mutual effects among additives including TiC particles,dispersant polyethylene glycol 6000(PEG6000)and anionic surfactant sodium dodecyl sulfate(SDS)were studied based on orthogonal *** content and distribution of TiC deposited in the coatings were measured by EPMA and *** thicknesses,phase compositions,microstructures and corrosion resistances of the codlings were cAarnined by using TT260 eddy current tuickncss gage,XRD,SEM and clcctrochcniical test,*** results show that the experiment design of this study is the key to study the mutual effects among these *** additive and their interactions all remarkably influence TiC content and corrosion resistance of the *** 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 ***,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.

关键词： Magnesium alloys Plasma electrolytic oxidation Additives Mutual effects Orthogonal experiment Corrosion resistance

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Genome-wide association study of 23 f lowering phenology traits and 4 f loral agronomic traits in tree peony (Paeonia section Moutan DC.) reveals five genes known to regulate f lowering time

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Horticulture Research 2023年第2期10卷 118-133页

作者： Yuying Li Lili Guo zhanying wang Dehui Zhao Dalong Guo John E.Carlson Weilun Yin Xiaogai Hou College of Agronomy/College of Tree Peony Henan University of Science and TechnologyLuoyangHenan471023China Luoyang Academy of Agricultural and Forestry Sciences LuoyangHenan471000China College of Forestry Henan University of Science and TechnologyLuoyangHenan471023China Department of Ecosystem Science and Management Pennsylvania State UniversityUniversity ParkPA 16802USA College of Biological Sciences and Technology Beijing Forestry UniversityBeijing 100083China

Tree peony is a unique traditional f lower in China,with large,fragrant,and colorful f ***,a relatively short and concentrated f lowering period limits the applications and production of tree peony.A genome-wide association study(GWAS)was conducted to accelerate molecular breeding for the improvement of f lowering phenology traits and ornamental phenotypes in tree peony.A diverse panel of 451 tree peony accessions was phenotyped for 23 f lowering phenology traits and 4 f loral agronomic traits over 3 *** by sequencing(GBS)was used to obtain a large number of genome-wide single-nucleotide polymorphisms(SNPs)(107050)for the panel genotypes,and 1047 candidate genes were identified by association ***-two related genes were observed during at least 2 years for f lowering,and seven SNPs repeatedly identified for multiple f lowering phenology traits over multiple years were highly significantly associated with five genes known to regulate f lowering *** validated the temporal expression profiles of these candidate genes and highlighted their possible roles in the regulation of f lower bud differentiation and f lowering time in tree *** study shows that GWAS based on GBS can be used to identify the genetic determinants of complex traits in tree *** results expand our understanding of f lowering time control in perennial woody *** of markers closely related to these f lowering phenology traits can be used in tree peony breeding programs for important agronomic traits.

关键词： breeding traits tree

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Combined genome-wide association studies and expression quantitative trait locus analysis uncovers a genetic regulatory network of floral organ number in a tree peony (Paeonia suffruticosa Andrews) breeding population

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Horticulture Research 2023年第7期10卷 206-220页

作者： Liping Peng Yang Li Wanqing Tan Shangwei Wu Qing Hao Ningning Tong zhanying wang Zheng’an Liu Qingyan Shu Key Laboratory of Plant Resources Institute of Botanythe Chinese Academy of SciencesBeijing 100093China China National Botanical Garden Beijing 100093China College of Life Science University of Chinese Academy of SciencesBeijing 100049China College of Landscape Architecture and Forestry Qingdao Agricultural UniversityQingdao 266109China Peony Research Institute Luoyang Academy of Agricultural and Forestry SciencesLuoyang 471000China

Great progress has been made in our understanding of floral organ identity determination and its regulatory network in many species;however,the quantitative genetic basis of floral organ number variation is far less well understood for species-specific traits from the perspective of population ***,using a tree peony(Paeonia suffruticosa Andrews,Paeoniaceae)cultivar population as a model,the phenotypic polymorphism and genetic variation based on genome-wide association studies(GWAS)and expression quantitative trait locus(eQTL)analysis were *** on 24 phenotypic traits of 271 representative cultivars,the transcript profiles of 119 cultivars were obtained,which indicated abundant genetic variation in tree *** total,86 GWAS-related cis-eQTLs and 3188 trans-eQTL gene pairs were found to be associated with the numbers of petals,stamens,and *** addition,19 floral organ number-related hub genes with 121 cis-eQTLs were obtained by weighted gene co-expression network analysis,among which five hub genes belonging to the ABCE genes of the MADS-box family and their spatial–temporal co-expression and regulatory network were *** results not only help our understanding of the genetic basis of floral organ number variation during domestication,but also pave the way to studying the quantitative genetics and evolution of flower organ number and their regulatory network within populations.

关键词： cultivar breeding trait

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Research on the Dynamic Capabilities of the Enterprise Based on Knowledge Management

Research on the Dynamic Capabilities of the Enterprise Based...

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2013年教育技术与管理科学国际会议

作者： wang zhanying Wuhan University of Technology

Knowledge management through knowledge sharing and the learn ing organization can strengthen the enterprise’s adaptability and creativity in the dynamic environment. And the knowledge management can promote the culture of the dynamic core Capabilities, help to achieve the sustainable development of enterprises. For Chinese enterprises, some problems still exist about the culture of the dynamic core competence. The paper in order to promote the culture of dynamic capabilities, from changing the management philosophy, promoting organizational change, information management, and learning organization ways to talk over the ways about the culture of the dynamic core competence.

关键词： Knowledge Management Dynamic capabilities of enterprises Sustainable development

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电解液组分对镁合金微弧氧化成膜及膜层耐蚀性的影响

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稀有金属材料与工程 2022年第8期51卷 3057-3069页

作者：王占营马颖安守静王晟安凌云兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室甘肃兰州730050

基于单纯形重心设计改变Na_(2)SiO_(3)、NaOH、KF和NaAlO_(2)4种组分的搭配,在AZ91D镁合金上进行微弧氧化处理,研究了电解液配方对膜层成膜及耐蚀性能的影响。结果表明,所得到的回归方程非常显著,预测精度高。帕累托分析显示,4种电解质... 详细信息

基于单纯形重心设计改变Na_(2)SiO_(3)、NaOH、KF和NaAlO_(2)4种组分的搭配,在AZ91D镁合金上进行微弧氧化处理,研究了电解液配方对膜层成膜及耐蚀性能的影响。结果表明,所得到的回归方程非常显著,预测精度高。帕累托分析显示,4种电解质均对膜层耐蚀性影响显著。通过响应面分析可知,增大主盐Na_(2)SiO_(3)或者NaAlO_(2)的浓度可以显著提高膜层的耐蚀性。但二者复合却不利于耐蚀性的提高。主盐对于提高膜层成膜性及耐蚀性至关重要。当电解液中无主盐时,膜层的成膜性及耐蚀性都很差。当电解液中含有主盐时,适当增加NaOH与KF的浓度,膜层耐蚀性提高。通过Pearson相关分析可知,膜层耐蚀性主要受致密度及孔隙率的影响,同时也受膜厚、物相等其他特征参量的影响。而电解液各组分通过影响上述微观结构特征参量从而影响膜层性能。

关键词： AZ91D镁合金微弧氧化电解液成膜性回归分析

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电解液配方对纯镁微弧氧化膜层耐蚀性的影响

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材料导报 2023年第15期37卷 169-178页

作者：王占营马颖安守静孙乐兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室兰州730050

基于单纯形重心设计改变Na_(2)SiO_(3)、NaOH、KF和NaAlO_(2)四种组分的搭配,在纯镁基体上制备微弧氧化膜层,研究了电解液各组分及其搭配对膜层耐蚀性能的影响。结果表明,拟合得到的回归方程的显著性较好,预测精度高。通过标准化回归系... 详细信息

基于单纯形重心设计改变Na_(2)SiO_(3)、NaOH、KF和NaAlO_(2)四种组分的搭配,在纯镁基体上制备微弧氧化膜层,研究了电解液各组分及其搭配对膜层耐蚀性能的影响。结果表明,拟合得到的回归方程的显著性较好,预测精度高。通过标准化回归系数及帕累托分析可知,KF对膜层点滴及电化学耐蚀性的影响均较大。由响应面分析可知,KF有助于膜层点滴耐蚀性的提高,但高浓度的KF反而不利于电化学耐蚀性的提升。主盐Na_(2)SiO_(3)和NaAlO_(2)可以明显提高膜层的电化学耐蚀性。膜层点滴耐蚀性与电化学耐蚀性的腐蚀机制不同是导致电解质对二者的影响有所区别的根本原因。

关键词：纯镁微弧氧化电解液单纯形重心设计回归分析

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纯镁表面等离子体电解渗硼改性层的制备及性能

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中国表面工程 2022年第6期35卷 88-97页

作者：孙乐马颖李奇辉王晟王占营兰州理工大学有色金属先进加工与再利用国家重点实验室兰州730050

在硼砂体系电解液中对纯镁进行等离子体电解渗硼(PEB),以提高其硬度、耐磨性和耐蚀性。用扫描电镜(SEM)、能谱仪(EDS)和X射线衍射仪(XRD)分别对PEB表面改性层的微观结构、元素分布和物相组成进行研究,并用显微硬度计与摩擦磨损试验机对... 详细信息

在硼砂体系电解液中对纯镁进行等离子体电解渗硼(PEB),以提高其硬度、耐磨性和耐蚀性。用扫描电镜(SEM)、能谱仪(EDS)和X射线衍射仪(XRD)分别对PEB表面改性层的微观结构、元素分布和物相组成进行研究,并用显微硬度计与摩擦磨损试验机对PEB表面改性层的硬度和耐磨性进行表征,同时用动电位极化曲线及电化学阻抗谱(EIS)来评估PEB表面改性层的耐蚀性。另外,还分析PEB表面改性层的生成机理,并建立物理模型。结果表明,PEB表面改性层由氧化层和扩散层组成,且在PEB表面改性层中检测到MgB_(2)新物相。PEB表面改性层的最大硬度约为480HV,是基体硬度的近16倍;摩擦因数仅为0.11,比基体减小了70.27%,磨损率为1.62×10^(-9)m^(3)/(N·m),比基体减小1个数量级;腐蚀电流密度比基体减小1个数量级,容抗弧半径和阻抗模值均比基体大,即纯镁经等离子体电解渗硼处理后,硬度、耐磨性和耐蚀性均得到提高。

关键词：镁等离子体电解渗硼表面改性微硬度耐磨性耐蚀性

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波浪环境下带助浮装置航行体落水冲击流场及运动特性研究

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爆炸与冲击 2024年第11期44卷 139-156页

作者：王占莹权晓波段金雄孙铁志哈尔滨工程大学船舶工程学院黑龙江哈尔滨150001 北京宇航系统工程研究所北京100076 中国运载火箭技术研究院北京100076 大连理工大学船舶工程学院工业装备结构分析优化与CAE软件全国重点实验室辽宁大连116024

为探究波浪环境下带助浮装置航行体下落冲击过程中的流场以及运动演化特性,基于CFD(computational fluid dynamics)数值模拟技术,在方法上耦合了VOF(volume of fluid)多相流模型、k-ωSST湍流模型、Schnerr-Sauer空化模型以及Stokes五... 详细信息

为探究波浪环境下带助浮装置航行体下落冲击过程中的流场以及运动演化特性,基于CFD(computational fluid dynamics)数值模拟技术,在方法上耦合了VOF(volume of fluid)多相流模型、k-ωSST湍流模型、Schnerr-Sauer空化模型以及Stokes五阶非线性波理论,建立了一套针对入水冲击问题的数值计算方法,并采用速度边界法进行造波。经验证,试验与数值结果在下落位移上对比差异较小,该数值方法可靠有效,且造波结果与Stokes五阶非线性波理论吻合较好。然后,基于构建的数值方法,在不同波浪环境下对带助浮装置航行体下落入水冲击过程进行了数值模拟,计算带助浮装置航行体冲击过程的位移、速度、加速度以及助浮装置受力情况,分析冲击过程中航行体的运动学参数、动力学参数以及入水空泡流场演化过程,总结了波浪环境下带助浮装置航行体的入水冲击特性。结果表明,波浪环境对下落冲击过程的影响主要体现在运动衰减段,水平方向的冲击相较于垂直方向的冲击受到波浪环境的影响要大得多,不同海况对航行体的水平冲击造成的影响主要是通过影响入水空泡的形成与溃灭过程实现的。

关键词：带助浮装置航行体入水冲击冲击载荷波浪载荷

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16MnR钢脉冲埋弧焊接头冲击性能研究

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焊接 2008年第4期 57-60页

作者：王占英李桓河北建筑工程学院张家口市075024 天津大学材料科学与工程学院 300072

针对埋弧焊时焊接热输入量较大,造成焊接接头晶粒粗大、脆性增大、塑性和韧性指标下降、裂纹敏感性增大的缺点,研究了一种新型的采用直流脉冲电流的埋弧焊工艺—脉冲埋弧焊。以16MnR钢板为试验母材,研究了陡降外特性焊接电源匹配变速送... 详细信息

针对埋弧焊时焊接热输入量较大,造成焊接接头晶粒粗大、脆性增大、塑性和韧性指标下降、裂纹敏感性增大的缺点,研究了一种新型的采用直流脉冲电流的埋弧焊工艺—脉冲埋弧焊。以16MnR钢板为试验母材,研究了陡降外特性焊接电源匹配变速送丝系统的脉冲埋弧焊对焊接接头冲击性能的影响。试验结果表明,脉冲埋弧焊可有效减小熔敷金属的成分偏析,细化晶粒,提高焊缝金属的冲击性能。该研究为脉冲埋弧焊开拓了广阔的应用前景,具有重要的工程应用价值。

关键词：脉冲埋弧焊冲击性能

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