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Recent Progress in Metallurgical Bonding Mechanisms at the Liquid/Solid Interface of Dissimilar Metals Investigated via in situ X-ray Imaging Technologies

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Acta Metallurgica Sinica(English Letters) 2021年第2期34卷 145-168页

作者： Zongye Ding naifang zhang Liao Yu Wenquan Lu Jianguo Li Qiaodan Hu Shanghai Key Laboratory of Materials Laser Processing and Modification School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China

The liquid/solid(L/S)interface of dissimilar metals is critical to the microstructure,mechanical strength,and structural integrity of interconnects in many important applications such as electronics,automotive,aeronautics,and astronautics,and therefore has drawn increasing research *** design preferential microstructure and optimize mechanical properties of the interconnects,it is crucial to understand the formation and growth mechanisms of diversified structures at the L/S interface during *** situ synchrotron radiation or tube-generated X-ray radiography and tomography technologies make it possible to observe the evolution of the L/S interface directly and therefore have greatly propelled the research in this ***,we review the recent progress in understanding the L/S interface behaviors using advanced in situ X-ray imaging techniques with a particular focus on the following two issues:(1)interface behaviors in the solder joints for microelectronic packaging including the intermetallic compounds(IMCs)during refl ow,Sn dendrites,and IMCs during solidification and refl ow porosities and(2)growth characteristics and morphological transition of IMCs in the interconnect of dissimilar metals at high ***,the main achievements and future research perspectives in terms of metallurgical bonding mechanisms under complex conditions with improved X-ray sources and detectors are remarked and discussed.

关键词： Liquid/solid interface Metallurgical bonding Dissimilar interconnects In situ X-ray imaging Solidification Microelectronic packaging

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3D morphological evolution and growth mechanism of proeutectic FeAl_(3) phases formed at Al/Fe interface under different cooling rates

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Journal of Materials Science & Technology 2022年第21期116卷 83-93页

作者： naifang zhang Qiaodan Hu Zongye Ding Wenquan Lu Fan Yang Jianguo Li Shanghai Key Laboratory of Materials Laser Processing and Modification School of Materials Science and EngineeringShanghai Jiao Tong University200240 ShanghaiChina School of Mechanical Engineering Shanghai Jiao Tong University200240 ShanghaiChina

The 3D morphologies and growth mechanisms of proeutectic FeAl_(3) at the Al/Fe interface under different cooling rates were studied by synchrotron X-ray *** increasing cooling rate,FeAl_(3) crystals developed from faceted polygonal prism,plates with flat surface,thin ribbon-like with periodic undulating surface to non-faceted rods with radial dendrites in cross section,indicating a gradual interface growth mode transition from two-dimensional layer growth to continuous *** a higher cooling rate,twinning mechanism plays a leading role in the formation and growth of FeAl_(3).A link between the morphologies,twinning and crystallographic structure was established based on quantitative analyses on the 3D structures.

关键词： Solidification 3D morphology FeAl_(3)Internetallic compounds Cooling rate Synchrotron radiation Al/Fe interface

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Effect of cooling rate on the 3D morphology of the proeutectic Al3Ni intermetallic compound formed at the Al/Ni interface after solidification

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Journal of Materials Science & Technology 2021年第10期69卷 60-68页

作者： Liao Yu Qiaodan Hu Zongye Ding Fan Yang Wenquan Lu naifang zhang Sheng Cao Jianguo Li Shanghai Key Laboratory of Materials Laser Processing and Modification School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Materials The University of ManchesterOxford RoadManchesterMl 39PLUK

Effect of cooling rate on the 3 D morphology and the growth mechanism of the proeutectic Al3Ni intermetallic compound(IMC) that forms at the Al/Ni interface after solidification was investigated by synchrotron X-ray microtomography in combination with EBSD analysis. The proeutectic Al3Ni phase that forms under an average cooling rate of 0.1 Ks^(-1) shows a characteristic faceted growth behavior and presents a typical 3 D morphology as partially hollow quadrangular prisms. On the contrary, that forms under an average cooling rate of 10 Ks^(-1) shows complicated dendritic morphology with asymmetrically distributed arms and faceted V-shape groove at the distal end, indicating a gradual transition of the growth behavior from non-faceted to faceted during the solidification process. These results reveal that the morphology of the proeutectic Al3Ni is highly sensitive to the solidification condition so that fine control of the desired morphology may be achieved by carefully manipulating the cooling profile.

关键词： 3D morphology Al3Ni intermetallic compounds Solidification Cooling rate Synchrotron radiation Al/Ni interface

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Intergrowth mechanism and morphology prediction of faceted Al_(3)Ni formed during solidification by a spatial geometric model

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Journal of Materials Science & Technology 2020年第19期54卷 40-47页

作者： Zongye Ding Qiaodan Hu Wenquan Lu Fan Yang Yihan Zhou naifang zhang Sheng Cao Liao Yu Jianguo Li Shanghai Key Laboratory of Materials Laser Processing and Modification School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai200444China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Materials University of ManchesterOxford RoadManchester M139PLUK

The interplay and intergrowth characteristic of faceted intermetallic compounds(IMCs)during solidification was originally investigated through the rod-like Al3 Ni crystals in the liquid Al/solid Ni interconnection by using synchrotron radiography,and the diversified 3-D morphologies were reconstructed by synchrotron tomography.A spatial geometric model was established to effectively predict the diversified growth patterns of two spatial *** the two overlapping Al3 Ni crystals,the impeded crystal growth was divided into three different stages,decided by the hindrance form the other ***,the groove formed on the crystal surface is directly related to the solute redistribution under the critical condition of boundary layer thickness larger than two crystals *** closer distance and smaller crystal size indicate the deeper and larger groove,and the morphology changes from hemispheroid to hemi-ellipsoid with the increased opposite and interacted faces.

关键词： Solidification Synchrotron radiography Intergrowth behaviour Intermetallic compounds 3-D morphology

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Unveiling the Growth Mechanism of Faceted Primary Al_(2)Cu with Complex Morphologies During Solidification

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Acta Metallurgica Sinica(English Letters) 2022年第1期35卷 124-132页

作者： Zongye Ding Qiaodan Hu Fan Yang Liao Yu Tianxing Yang naifang zhang Wenquan Lu Jingwei Yang Jian Qiao Jianguo Li School of Mechatronic Engineering and Automation Foshan UniversityFoshan528225China Shanghai Key Laboratory of Materials Laser Processing and Modification School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai200240China

The growth characteristic of primary faceted Al_(2)Cu intermetallic compounds(IMCs)during solidification was observed directly by synchrotron *** formation and transition mechanisms of Al_(2)Cu IMCs with diverse morphologies were elucidated by first-principle calculations combined with electron backscatter diffraction *** Al_(2)Cu crystals preferred to grow along the[001]direction and were bounded by{110}planes with the lowest surface *** faceted Al_(2)Cu rod-like clusters consisted of multiple crystals with complete rod,hollowness and partial sides,which was attributed to the increase in strain energy and solute redistribution during *** faceted Al_(2)Cu with branches was characteristic with the perpendicular relationship between the main branches and side steps and partial coalescence at the junction,which was ascribed to the continuous propagation and growth of newly formed crystals along the diagonal direction.

关键词： Solidification Synchrotron radiography Internetallic compounds Crystal growth Morphology

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国际金融危机下我国可考虑征收两级“托宾税”

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涉外税务 2009年第8期 34-36页

作者：张乃方山东大学经济学院金融系山东济南250100

本文回顾了"托宾税"设想产生与发展的过程,提出在全球金融危机下研究征收两级"托宾税"的重要性,并对我国建立两级"托宾税"的税制设计和征管安排提出了具体构想。

关键词： “托宾税” 汇率金融危机投机资本

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侠客·名流·圣人:中国古典题材影片“英雄”内涵流变考索

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电影评介 2018年第21期 23-26页

作者：张乃芳华北电力大学(保定)马克思主义学院

古装影片是电影艺术的有机组成部分之一,尤其在中国电影的拍摄之中,古装影片始终占据着重要的地位。这取决于中国经历过丰富多彩的古代历史,充分的题材可供选取;同时,这些历史中又发生了太多可歌可泣的故事,其完美的品质足以给历史读者... 详细信息

古装影片是电影艺术的有机组成部分之一,尤其在中国电影的拍摄之中,古装影片始终占据着重要的地位。这取决于中国经历过丰富多彩的古代历史,充分的题材可供选取;同时,这些历史中又发生了太多可歌可泣的故事,其完美的品质足以给历史读者和观众以强烈的心灵震撼。作为完美品质的代表者,“英雄”这一形象几乎是所有观众都“虽不能至,心向往之”的人物,但只要仔细探讨中国古装影片中出现的各式各样的英雄便会发现,这一类人物事实上处在一个动态的变化历程中,但这一变化历程较为平稳,以至于一般观众并没有做出细致的分析。简而言之,中国古装影片中的“英雄”形象的内涵演进历程可以分为三个阶段,即从侠客到名流再到圣人,这三个阶段均是“英雄”本性的直接体现,但其程度却呈现出逐步加深的态势。

关键词：中国电影古典题材英雄影片圣人侠客流变有机组成部分

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《论语》文本中隐含的“天人合一”思想的三重意蕴

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河北大学学报（哲学社会科学版） 2021年第2期46卷 9-16页

作者：张乃芳华北电力大学马克思主义学院河北保定071003

《论语》中远没有形成真正的“天人合一”思想,但是孔子对“天”的态度已经明晰,他对其神秘性“敬而远之”,对其神圣性则“敬而行之”,体现在天人关系上,则隐含了多层次的“天人合一”思想意蕴,具体包含“天意人承”“天启人合”“天命... 详细信息

《论语》中远没有形成真正的“天人合一”思想,但是孔子对“天”的态度已经明晰,他对其神秘性“敬而远之”,对其神圣性则“敬而行之”,体现在天人关系上,则隐含了多层次的“天人合一”思想意蕴,具体包含“天意人承”“天启人合”“天命人成”三个逻辑层次。在“天意人承”层次中,天是外在于人生命活动的神秘之天;“天启人合”层次中,人与天的神圣之德相合;“天命人成”层次中,神圣的天与人之间双向印证、双向成就。三个逻辑层次在文本中相融相就,为后来的“天人合一”思想奠定了基础。经过后世儒者的继承与发展,最终形成了中华民族独特的思维方式,并成就了今天中国担当精神的风貌,兼具理性积极的担当之勇、全面兼顾的担当之智、自觉自愿的担当之乐。

关键词：《论语》天人合一儒家担当精神

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科学发展观对中西传统“人本”思想的超越

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解放军艺术学院学报 2009年第4期 59-61页

作者：张冬生张乃芳华北电力大学数理系华北电力大学法政系河北大学

在中西方历史上,都有过与其历史背景密切相关的"人本"思想。与其对照,以马克思主义为指导的科学发展观的"以人为本",超越了中西方传统的"人本思想"的历史局限性。从历史角度来看科学发展观的核心,有利于把握其时代意义和现实意义。

关键词：科学发展观以人为本马克思主义

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厌氧氨氧化研究的分子生态学进展

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浙江大学学报（农业与生命科学版） 2019年第2期45卷 135-142页

作者：朱辰张乃方徐陈超张凯杭程磊浙江大学生命科学学院生命系统稳态与保护教育部重点实验室杭州310058

厌氧氨氧化(anaerobic ammonium oxidation, ANAMMOX)通常指微生物在厌氧条件下,以亚硝酸根为电子受体,将铵根离子氧化成氮气的过程,主要由浮霉菌门(Planctomycetales)细菌驱动。厌氧氨氧化菌广泛分布于陆地与海洋生态系统里,在全球氮... 详细信息

厌氧氨氧化(anaerobic ammonium oxidation, ANAMMOX)通常指微生物在厌氧条件下,以亚硝酸根为电子受体,将铵根离子氧化成氮气的过程,主要由浮霉菌门(Planctomycetales)细菌驱动。厌氧氨氧化菌广泛分布于陆地与海洋生态系统里,在全球氮循环中发挥着重要的作用。本文综合分析了在群落水平、细胞水平、分子和组学水平下厌氧氨氧化过程的生态学研究进展,结合不同尺度下的方法与技术介绍,初步探讨和展望了不同生态系统中厌氧氨氧化的前沿问题与研究方向。

关键词：厌氧氨氧化过程方法与技术代谢途径

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