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Journal of Wuhan University of Technology(Materials Science) 2019年第4期34卷 840-844页

作者： DAI Xueting huang zhongyue ZU Fangqiu State-owned Machinery Factory in Wuhu Wuhu 241007China School of Materials Science & Engineering Hefei University of TechnologyHefei 230009China

Bi2Te2.7Se0.3/Cu core/shell powders were prepared by electroless plating and hydrogen reduction, and then sintered into bulk by spark plasma sintering in order to improve the thermoelectric and mechanical properties of n-type Bi-Te thermoelectric material. After electroless plating, with the increasing of Cu content, Seebeck coefficient keeps increasing and power factor enhances significantly. The highest power factor increases by three times and reaches 23.8 W·cm^-1·K^-2 at room temperature in Bi2Te2.7Se0.3 with 0.22 wt%Cu sample, which means electrical transport properties of Bi2Te2.7Se0.3/Cu samples have been ***, the ZT values of Bi2Te2.7Se0.3/Cu samples can be enhanced at different temperature zone by adjusting the Cu content. Bi2Te2.7Se0.3 with 0.05 wt% Cu sample has the best thermoelectric properties in high temperature zone, and the ZT peak value increases from 0.35 to 0.85 at 623 K. When the Cu content increases to 0.15 wt%,the ZT peak value moves to the low temperature(373 K) and increases from 0.24 to 0.71. At the same time, the mechanical properties increases with the increasing of Cu content.

关键词： thermoelectric materials electroless plating thermoelectric properties mechanical properties

The effect of melt overheating on the melt structure transition and solidified structures of Sn-Bi40 alloy

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Science China(Technological Sciences) 2008年第9期51卷 1402-1408页

作者： CHEN HongSheng ZU FangQiu CHEN Jie ZOU Li DING GuoHua huang zhongyue Liquid/Solid Metal Processing Institute School of Materials Science and EngineeringHefei University of TechnologyHefei 230009China

Evolution of the electrical resistivity of Sn-40wt%Bi melt with time under different overheating temperatures during isothermal experiments has been studied, and the relationship between different melt state, solidification behavior and solidified structure has also been investigated. The results show that the melt structure transition revealed by the abnormal change of resistivity would take place within a certain holding time just when the holding temperature is above a certain critical, and that the higher the temperature above the critical, the shorter the "incubation period" of the melt structure transition, and the faster the transition speed. The results of solidification experiments suggest that the melt structure transition caused by different holding time at the same temperature can lead to a higher so-lidification undercooling degree, finer grain size and change of microscopic pattern. Further exploration indicates that the solidification undercooling degree can come to a head when the melt is held at the specific temperature for a given time. The functionary mechanism of the phenomena above is also discussed briefly.

关键词： Sn-Bi alloy electrical resistivity melt structure transition solidified structure

Effects of hydrogenation temperature on room-temperature compressive properties of CMHT-treated Ti6Al4V alloy

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Journal of Materials Science & Technology 2021年第13期72卷 132-143页

作者： Baoguo Yuan Xing Liu Jiangfei Du Qiang Chen Yuanyuan Wan Yunliang Xiang Yan Tang Xiaoxue Zhang zhongyue huang School of Materials Science and Engineering Hefei University of TechnologyHefei 230009PR China Beijing Aerospace New Trend Machinery and Equipment Co. Ltd.Beijing 100039PR China Southwest Technology and Engineering Research Institute Chongqing 400039PR China School of Mechanical Engineering Anhui Sanlian UniversityHefei 230601PR China

Compression tests were performed at room temperature to investigate the effects of hydrogenation temperature on compressive properties of Ti6 Al4 V alloy treated by continuous multistep hydrogenation treatment(CMHT).Pressure-composition isotherms and micro structures were also *** showed that the equilibrium hydrogen pressure increased,and the hydrogen absorption rate decreased with the increase of hydrogenation *** amounts ofβphase andα"martensite increased first and then decreased when Ti6 Al4 V alloy was treated by four times CMHT with the increase of hydrogenation *** temperature played a different role on the compressive properties of CMHT-treated Ti6 Al4 V *** ultimate compression of Ti6 Al4 V alloy treated by 11 times CMHT at850℃increased by 83.3%as compared to the as-received Ti6 Al4 V *** compressive properties of Ti6 Al4 V alloy were dependent on the amounts of different phases and microstructures when Ti6 Al4 V alloy was treated by CMHT at different temperatures.

关键词： Titanium alloy Continuous multistep hydrogenation treatment Hydrogenation temperature Plasticity

Enhancing thermoelectric performance of Cu-modified Bi0.5Sb1.5Te3 by electroless plating and annealing

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Progress in Natural Science:Materials International 2018年第2期28卷 218-224页

作者： zhongyue huang He Zhang Kun Zheng Xueting Dai Yuan Yu Hefa Cheng Fangqiu Zu Zhi-Gang Chen School of Materials Science & Engineering Hefei University of Technology Institute of Microstructure and Properties of Advanced Materials Beijing University of Technology Centre for Future Materials University of Southern Queensland Materials Engineering The University of Queensland

With the capacity of energy conversion from heat to electricity directly, thermoelectric materials have been considered as an alternative solution to global energy crisis. In this work, Cu modified Bi0.5Sb1.5Te3(BST)composites are prepared by a facile electroless plating Cu method, spark plasma sintering, and annealing. The annealed 0.22 wt.%Cu/BST has an enhanced peak Figure of Merit(z T) of0.71 at 573 K with high average z T of0.65 in the wide temperature range between 300 and 573 K. Due to the significant increase of electrical conductivity and low lattice thermal conductivity, the annealed 0.22 wt.%Cu/BST shifts peak z T to high temperature, and shows 492% enhancement than that of pristine BST with z T of 0.12 at 573 K. Through detailed structural characterization of the annealed 0.22 wt.%Cu/BST, we found that Cu can dope into BST matrix and further form Cu2 Te nanoprecipitates, dislocations, and massive grain boundaries, leading to a low lattice thermal conductivity of 0.30 Wm-1 K-1 in the annealed 0.22 wt.%Cu/BST. Such enhanced peak z T in high-temperature and high average z T in the wide temperature range shows that the electroless plating Cu method and annealing can improve the thermoelectric performance of commercial BST and expand the applicability of Bi2Te3thermoelectric materials in the power generations.

关键词： Bi0.5Sb1.5Te3 Thermoelectric materials Electroless plating Annealing Average zT

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环境压力下吸热燃气轮机循环工程

化工学报 2007年第12期58卷 3147-3151页

作者：王巍薛利超黄钟岳大连理工大学能源与动力学院辽宁大连116024

构建新的循环以提高动力循环效率和发电功率,是能源利用转换领域的基础研究内容之一。本文提出了新型环境压力下吸热燃气轮机循环APGC(ambient pressure gas turbine cycle),并利用商业软件Aspen Plus建立了APGC燃气动力装置以及燃料电... 详细信息

构建新的循环以提高动力循环效率和发电功率,是能源利用转换领域的基础研究内容之一。本文提出了新型环境压力下吸热燃气轮机循环APGC(ambient pressure gas turbine cycle),并利用商业软件Aspen Plus建立了APGC燃气动力装置以及燃料电池分析模型,对其在燃料电池装置以及在沼气发电、钢铁行业动力回收中的应用进行模拟和分析,并给出相应的分析结果,显示出APGC独具的优势以及广阔的应用前景。

关键词：环境压力下吸热燃气轮机循环应用燃气轮机

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环境压力下吸热燃机复合系统性能

化工学报 2008年第12期59卷 3120-3125页

作者：王巍张聪薛利超黄钟岳大连理工大学能源与动力学院辽宁大连116024

环境压力吸热燃气轮机循环(APGC)能够吸收发电装置排出的低压废气能量,增加系统本身的做功能力和效率,达到节能、减少燃料消耗的目的。本文基于Aspen Plus软件建立了APGC以及与回热Brayton循环组成的复合循环模型,给出了APGC的结构示意... 详细信息

环境压力吸热燃气轮机循环(APGC)能够吸收发电装置排出的低压废气能量,增加系统本身的做功能力和效率,达到节能、减少燃料消耗的目的。本文基于Aspen Plus软件建立了APGC以及与回热Brayton循环组成的复合循环模型,给出了APGC的结构示意图,模拟和分析了回热Brayton循环(BC)和APGC组成的复合系统性能。通过对回热复合循环性能的分析得出,系统最佳性能可以通过改变底部循环膨胀压力和顶层循环压比获得,并提出加权分析方法,具有一定的理论设计和实践应用的指导意义。

关键词：环境压力吸热燃气轮机循环复合系统加权分析法

粤港澳大湾区中医药高地产学研建设的效率测度研究

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医学与社会 2023年第11期36卷 45-51,58页

作者：黄仲跃张文龙舒燕中国医学科学院医学信息研究所北京100020 广州中医药大学公共卫生与管理学院广东广州511400

目的:评估粤港澳大湾区中医药高地产学研建设的效率水平,分析其时序演化规律与空间分布特征,为提升中医药高地产学研建设效率提供参考。方法:基于相关统计年鉴数据,运用超效率数据包络分析、Malmquist指数和空间自相关模型分析粤港澳大... 详细信息

目的:评估粤港澳大湾区中医药高地产学研建设的效率水平,分析其时序演化规律与空间分布特征,为提升中医药高地产学研建设效率提供参考。方法:基于相关统计年鉴数据,运用超效率数据包络分析、Malmquist指数和空间自相关模型分析粤港澳大湾区中医药高地产学研建设效率的时序演化规律和空间分布特征。结果:2018-2020年中医药高地产学研建设效率整体达到有效水平,仅中医药产业效率均值小于1;在Malmquist指数分析中,中医药人才、创新和产业方面的全要素生产率指数均值大于1;空间自相关分析显示,粤港澳大湾区在中医药人才、创新和产业效率的莫兰指数均值为负值。结论:粤港澳大湾区中医药高地产学研建设的效率基本达到有效水平但是未存在显著的空间自相关性,并且存在较大的区域差异。亟需提升中医药高地产学研建设的效率并减小城市间的差距。

关键词：卫生事业管理中医药产学研粤港澳大湾区效率

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电子陪护证的设计与实现

电子技术（上海） 2022年第9期51卷 182-183页

作者：黄忠约温州市中西医结合医院浙江325000

阐述电子陪护证的需求、设计、实现,系统模块包括陪护证申请、陪护证查询、陪护证列表、陪护在院情况登记、陪护审核、陪护体温批量录入、陪护情况报表、陪护外出统计报表。

关键词：计算机技术电子陪护证智能化管理

温度对Cu_(50)Zr_(50)非晶合金晶化激活能和热稳定性影响

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特种铸造及有色合金 2015年第11期35卷 1193-1195页

作者：沈跃华李小蕴张启东黄中月合肥工业大学材料科学与工程学院

通过拟合计算和退火的方法研究了熔体温度对Cu50Zr50非晶的晶化激活能和热稳定性的影响。结果表明,熔体温度越高,非晶晶化激活能越高,非晶形核所需要克服的能量势垒越大,原子的移动能力越低,非晶越不易形核晶化,非晶的热稳定性越好。

关键词：非晶合金熔体温度晶化激活能热稳定性

子午流线转弯半径对半开式离心压缩机叶轮气动性能的影响

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振动工程学报 2004年第Z1期17卷 197-199页

作者：姜绪强谢蓉黄钟岳王晓放大连理工大学动力系大连116023

利用NUMECA软件Fine/Turbo模拟半开式离心压缩机叶轮内部的三维流动,并对两种子午流线转弯半径的叶轮进行了数值模拟.结果表明:Fine/Turbo可有效模拟半开式离心压缩机叶轮的三维粘性流场;增大子午流线转弯半径可减小离心力,减弱间隙与... 详细信息

利用NUMECA软件Fine/Turbo模拟半开式离心压缩机叶轮内部的三维流动,并对两种子午流线转弯半径的叶轮进行了数值模拟.结果表明:Fine/Turbo可有效模拟半开式离心压缩机叶轮的三维粘性流场;增大子午流线转弯半径可减小离心力,减弱间隙与子午流线共同作用的影响,明显减小叶轮出口气流的回流漩涡,改善叶轮出口气流的不均匀程度.

关键词：离心压缩机叶轮子午流线数值计算