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Crystal orientation and corrosion resistance of CuNi10Fe1Mn alloy billet under rotating electromagnetic field

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Rare Metals 2012年第6期31卷 552-555页

作者： fu yabo Cui Jing Li Tingju Taizhou Univ Sch Phys & Elect Engn Taizhou 318000 Peoples R China Civil Aviat Univ China Sch Airport Tianjin 300300 Peoples R China Dalian Univ Technol Sch Mat Sci & Engn Dalian 116024 Peoples R China

CuNi10Fe1Mn alloy billet under rotating electromagnetic field (REF) was characterized in this work. The change of the crystal orientation was first explored by X-ray diffraction (XRD) and scanning election microscope (SEM); the corrosion resistance was done by three electrodes system, and the natural sea water was used as corrosion medium. The results demonstrate that the strongest crystal orientation is transformed from crystal plane (200) to (111); moreover, the crystal plane (111) whose intensity is the strongest on the cross section and vertical section with REF causes the tubes be rolled easily, and the corrosion resistance of the billet is increasing with REF. As a result, properties of CuNi10Fe1Mn alloy tubes can be improved by REF.

关键词： rotating electromagnetic field (REF) crystal orientation corrosion resistance

Study of ultrahigh-purity copper billets refined by vacuum melting and directional solidification

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Rare Metals 2011年第3期30卷 304-309页

作者： fu yabo CHEN Jie LIU Ning LU Yiping LI Tingju YIN Guomao Key Laboratory of Materials Modification by Laser Ion and Electron Beams Ministry of Education Dalian University of Technology Dalian 116085 China School of Materials Science and Engineering Dalian University of Technology Dalian 116085 China

The purpose of this paper is to study large-sized copper billets refined with 5N ultrahigh purity after vacuum melting and directional solidifi-cation （VMDS）. The precise impurity analysis of copper billets was carried out with a glow discharge mass spectrometer （GDMS）. The re-sults demonstrate that the total concentration of twenty-two impurities is decreased by 63.1wt.%-66.5 wt.%. Ag, P, S, Na, Mg, Se, Zn, In and Bi are easy to be removed due to lgPimp - lgPCu 1.5, and they can be removed effectively under the vacuum condition of 1650-1700 K for 30 min. The electrical conductivity of 5N copper is higher than that of the raw material as the impurity concentrations decrease. The segrega-tion effect in directional solidification can be remarkable when the equilibrium distribution coefficient （k0） value is less than 0.65 due to the strong affinity of Cu for some metallic and non-metallic impurities.

关键词： copper refining vacuum melting directional solidification electrical conductivity

行星轧制条件下Cu-Cr-Zr合金棒坯的裂纹研究(英文)

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稀有金属材料与工程 2015年第3期44卷 567-570页

作者：付亚波崔静曹志强台州学院浙江台州318000 中国民航大学天津300300 大连理工大学辽宁大连116024

通过宏观和微观组织研究了棒坯边部、心部的晶粒尺寸及裂纹。利用横断面和纵断面的SEM微观组织分析了心部的裂纹形成机理。结果表明:边部的晶粒因为完成了动态再结晶,使晶粒比心部更加细化;心部约40μm的微裂纹是由于第二相粒子(体心立... 详细信息

通过宏观和微观组织研究了棒坯边部、心部的晶粒尺寸及裂纹。利用横断面和纵断面的SEM微观组织分析了心部的裂纹形成机理。结果表明:边部的晶粒因为完成了动态再结晶,使晶粒比心部更加细化;心部约40μm的微裂纹是由于第二相粒子(体心立方的沉淀相Cr及金属间化合物Cu51Zr14和Cu5Zr)作为微裂纹的形成源,因为晶粒粗大降低了其强度而诱发。因而细化晶粒能防止微裂纹的形成。裂纹形成机理适合微孔形核、长大和聚合的位错模型。

关键词：裂纹形成机理 Cu-Cr-Zr合金行星轧制位错模型

High-throughput screening of CO_(2) cycloaddition MOF catalyst with an explainable machine learning model

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Green Energy & Environment 2025年第1期10卷 132-138页

作者： Xuefeng Bai Yi Li yabo Xie Qiancheng Chen Xin Zhang Jian-Rong Li Beijing Key Laboratory for Green Catalysis and Separation and Department of Chemical Engineering College of Materials Science&EngineeringBeijing University of TechnologyBeijing100124China

The high porosity and tunable chemical functionality of metal-organic frameworks(MOFs)make it a promising catalyst design ***-throughput screening of catalytic performance is feasible since the large MOF structure database is *** this study,we report a machine learning model for high-throughput screening of MOF catalysts for the CO_(2) cycloaddition *** descriptors for model training were judiciously chosen according to the reaction mechanism,which leads to high accuracy up to 97%for the 75%quantile of the training set as the classification *** feature contribution was further evaluated with SHAP and PDP analysis to provide a certain physical understanding.12,415 hypothetical MOF structures and 100 reported MOFs were evaluated under 100℃ and 1 bar within one day using the model,and 239 potentially efficient catalysts were *** them,MOF-76(Y)achieved the top performance experimentally among reported MOFs,in good agreement with the prediction.

关键词： Metal-organic frameworks High-throughput screening Machine learning Explainable model CO_(2)cycloaddition

Microstructure evolution and non-equilibrium solidification of undercooled Ni-29.8at% Si eutectic alloy melts

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Science China(Technological Sciences) 2010年第4期53卷 1043-1048页

作者： LU YiPing1,LI TingJu1,TENG HaiTao1,fu yabo1,LUO DaWei1 &YANG GenCang2 1 School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,China 2 State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an710072,China School of Materials Science and Engineering Dalian University of Technology Dalian China State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi’an China

Microstructure formation and transition of undercooled bulk Ni70.2Si29.8 eutectic alloy melt were investigated by melt fluxing,cyclical overheating and cooling under high-frequency vacuum *** maximum undercooling of the alloy melt amounted to 428 *** electron microscope(SEM),energy-dispersive X-ray spectroscopy(EDS) and optical microscopy techniques(OM) were adopted to investigate the microstructure and identify the phase *** cooling curves of eutectic alloys upon solidification which were subjected to different undercoolings were described and *** complex microstructure evolution was observed in the as-solidified samples with the increase of ***,an extremely fine microstructure was achieved at the max undercooling of 428 K,and the lamellar distance of about 50-100 nm was *** on the solution entropy of eutectic phases,the microstructure transition with the undercooling was *** results showed that the microstructure transition process was ascribed to solution entropy of transition,i.e.,the complex microstructure evolution was attributed to a transition from faceted-faceted(FF)→faceted-nonfaceted(FN)→nonfaceted-nonfaceted(NN) eutectic systems concurring with increased undercooling.

关键词： interface structure solidification entropy metals and alloys

B4C-W2B5复合陶瓷的原位反应制备及其强韧化机理

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陶瓷学报 2019年第4期40卷 451-457页

作者：潘登李树丰张鑫潘渤付亚波西安理工大学材料学院陕西西安710048 西安热工研究院陕西西安710054 台州学院物理与电子工程学院浙江台州318000

碳化硼(B4C)陶瓷因致密化烧结温度高(>2200℃)和断裂韧性与硬度不匹配的关键问题而阻碍了其广泛应用。为了解决以上问题,本文提出采用粉末冶金法(P/M)通过石墨粉(Gr)与硼粉(B)之间的原位反应(in-situ)以降低其致密化烧结温度;同时通过... 详细信息

碳化硼(B4C)陶瓷因致密化烧结温度高(>2200℃)和断裂韧性与硬度不匹配的关键问题而阻碍了其广泛应用。为了解决以上问题,本文提出采用粉末冶金法(P/M)通过石墨粉(Gr)与硼粉(B)之间的原位反应(in-situ)以降低其致密化烧结温度;同时通过添加碳化鹄(WC)以生成板条状的五硼化二铸(W2B5)来提高其断裂韧性的研究思路,制备B4C-W2B5复合陶瓷。实验以硼(B)粉、石墨(Gr)粉以及碳化铸(WC)粉为原料,经过行星式高能球磨制备混合粉末,然后采用放电等离子烧结法(Spark plasma sintering,SPS)在烧结工艺为:压力30 MPa、烧结温度1100℃~1550℃~1700℃三步保温、烧结时间5 min^5 min^6 min的条件下对混合粉末进行固化烧结,分析了W2B5含量对复合陶瓷的微观结构和力学性能的影响,并对增韧机理进行了探讨。结果表明:当产物中B4C:W2B5=4:1(摩尔比),在1700℃下烧结,硬度和断裂韧性能够相平衡,致密度可达到100%,硬度为37.9 GPa,断裂韧性可达7.8 MPa·m^1/2.

关键词： B4C-W2B5 放电等离子烧结原位反应断裂韧性

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定向凝固结合电子束制备高纯铜的研究

真空科学与技术学报 2011年第4期31卷 495-499页

作者：陈洁付亚波刘宁卢一平李廷举大连理工大学材料科学与工程学院大连116024

对定向凝固结合电子束制备5N高纯铜进行了研究。首先采用真空感应熔炼4N(99.99%)阴极铜并进行定向凝固实验,然后利用电子束对定向凝固后的铸锭进行重熔精炼,利用辉光放电质谱仪进行成分分析。实验结果表明:真空熔炼可以有效去除铜中饱... 详细信息

对定向凝固结合电子束制备5N高纯铜进行了研究。首先采用真空感应熔炼4N(99.99%)阴极铜并进行定向凝固实验,然后利用电子束对定向凝固后的铸锭进行重熔精炼,利用辉光放电质谱仪进行成分分析。实验结果表明:真空熔炼可以有效去除铜中饱和蒸气压高的杂质;通过定向凝固,杂质元素含量沿铸锭轴向逐渐升高;经过组合工艺提纯后,总杂质含量由13.6×10-6降低至4.0×10-6,铜的纯度提高至99.9996%。

关键词：真空熔炼定向凝固电子束阴极铜

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手术机器人末端执行器械尺寸链分析

机械制造 2022年第10期60卷 46-51页

作者：付亚波孙亚军上海电气集团股份有限公司中央研究院上海200070 苏州肯美特设备集成有限公司江苏苏州215127

手术机器人末端执行器械用于保证手术工具的安装位置,对手术机器人的运行精度有重要影响。对手术机器人末端执行器械进行尺寸链分析,充分考虑形位公差在尺寸链计算中的影响,将形位公差转换为正负公差来参与计算。利用尺寸链正计算原理... 详细信息

手术机器人末端执行器械用于保证手术工具的安装位置,对手术机器人的运行精度有重要影响。对手术机器人末端执行器械进行尺寸链分析,充分考虑形位公差在尺寸链计算中的影响,将形位公差转换为正负公差来参与计算。利用尺寸链正计算原理对各个组成环的精度分配进行验算,利用极限法和均方根法分别进行计算与对比,确认对手术机器人末端执行器械采用极值法进行尺寸链计算可以满足设计要求,并且计算结果相比均方根法更为保守。

关键词：手术机器人执行器械尺寸链分析

高气压脉冲DBD等离子体聚合羧基功能薄膜的研究

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真空科学与技术学报 2007年第4期27卷 305-308页

作者：汤文杰陈强付亚波葛袁静北京印刷学院印刷包装材料与技术北京市重点实验室等离子体物理及材料研究室北京102600

在40 kHz脉冲介质阻挡放电(DBD)产生等离子体,以丙烯酸为单体,在2000 Pa的高气压下,聚合带羧基的功能薄膜。采用接触角测试仪(WCA)、傅里叶红外光谱仪(FTIR)、X光电子能谱(XPS)研究了占空比对沉积薄膜化学结构、表面性能的影响。实验得... 详细信息

在40 kHz脉冲介质阻挡放电(DBD)产生等离子体,以丙烯酸为单体,在2000 Pa的高气压下,聚合带羧基的功能薄膜。采用接触角测试仪(WCA)、傅里叶红外光谱仪(FTIR)、X光电子能谱(XPS)研究了占空比对沉积薄膜化学结构、表面性能的影响。实验得到,中频脉冲DBD放电在高气压下制备的薄膜官能团含量较高;结果同时表明薄膜的性能受脉冲放电占空比的影响较大,占空比越小,薄膜的化学结构与单体更相近,官能团密度越多,但薄膜的稳定性较差。

关键词：中频脉冲电源 DBD放电羧基薄膜占空比