检索结果-南通市图书馆

High-temperature Mechanical Properties and Dynamic Recrystallization Mechanism of in situ Silicide-reinforced MoNbTaTiVSi Refractory High-entropy Alloy composite

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2022年第10期35卷 1617-1630页

作者： Shaofan Ge Shifeng Lin Huameng Fu Long Zhang Tieqiang Geng Zhengwang Zhu Zhengkun Li Hong Li Aimin Wang Hongwei Zhang Haifeng Zhang Shi-Changxu Innovation Center for Advanced materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of materials Science and Engineering University of Science and Technology of ChinaHefei230026China CAS Key Laboratory of Nuclear materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang110016China dongguan Eontec co. LtdDongguan523662China

The hypoeutectic composite material composed of BCC phase and in situ precipitated Ti_(5)Si_(3) was prepared by adding Si into MoNbTaTiV high-entropy *** obvious oriented in situ Ti_(5)Si_(3) phase formed eutectic phase with BCC phase in the inter-dendritic area,which leads to excellent properties of the *** alloy exhibits ultra-high yield stress of 718 MPa at 1200℃ and obvious compression *** reaching the maximum strength,dynamic recovery(DRV)and dynamic recrystallization(DRX)caused soften *** DRX mechanism of the dual-phase eutectic structure is analyzed by electron backscatter *** DRX of the BCC phase conforms to the discontinuous DRX and continuous DRX mechanisms,while the Ti_(5)Si_(3) phase has a geometric DRX mechanism in addition to the above two *** high performance of this composite has enough potential high-temperature applications such as nuclear and aero engine.

关键词： Refractory high-entropy alloy composite Mechanical properties In situ silicide compound Dynamic recrystallization

Robust modal phase matching in subwavelength x-cut and z-cut lithium niobate thin-film waveguides

在线全文

学校读者我要写书评

暂无评论

Chinese Optics Letters 2021年第7期19卷 72-76页

作者： Lingzhi Peng Lihong Hong Baoqin Chen Peng He Zhiyuan Li School of Physics and Optoelectronics South China University of TechnologyGuangzhou 510641China Guangdong Full-Spectra Laser Technology co. Ltd.Dongguan 523808China dongguan Sanhang Innovation Research Institute Dongguan 523808China

We use the nonlinear coupled-mode theory to theoretically investigate second-harmonic generation(SHG) in subwavelength x-cut and z-cut lithium niobate(LN) thin-film waveguides and derive the analytical formula to calculate SHG efficiency in x-cut and z-cut LN thin-film waveguides *** the scheme of optimal modal phase matching(MPM), two types of LN thin films can achieve highly efficient frequency doubling of a 1064 nm laser with a comparable conversion efficiency due to very consistent modal field distribution of the fundamental wave and second-harmonic wave with efficient overlap between *** a robust MPM for high-efficiency SHG in both the subwavelength x-cut and z-cut LN thin-film waveguides is further confirmed in a broad wavelength range, which might facilitate design and application of micro–nano nonlinear optical devices based on the subwavelength LN thin film.

关键词： lithium niobate thin film modal phase matching nonlinear coupled-mode theory second-harmonic generation

Isothermal Crystallization Kinetics of Nylon 10T and Nylon 10T/1010 copolymers:Effect of Sebacic Acid as a Third comonomer

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(materials Science) 2018年第5期33卷 1247-1255页

作者： WANG Zhongqiang HU Guosheng ZHANG Jingting XU Jiusheng SHI Wenbo Institute of Maeromolecules and Bioengineering School o/Materials Science and EngineeringNorth University of ChinaTaiyuan 030051China Guangdong Sinoplast Advanced Material co.ltd. Dongguan 523860China

Nylon 10T and nylon 10T/1010 samples were synthesized by direct melt *** isothermal crystallization kinetics of nylon 10T and nylon 10T/1010 was investigated by means of differential scanning calorimetry（DSC）.The crystallization kinetics under isothermal condition has been analyzed by the Avrami *** was found that the Avrami equation was well-suited to describe the isothermal crystallization kinetics,combined with the results of the Turnbull-Fisher *** values of Tm^0 and Kg were obtained by Hoffman-Weeks and Lauritzen-Hoffman equations,*** activation energies for isothermal crystallization of nylon 10T and nylon 10T/1010 were determined using the Arrhenius equation and found to be-123.24 and-81.86 kJ·mol^（-1）,respectively,which reveals that the crystallization ability of nylon 10T/1010was lower than that of nylon 10T during the isothermal crystallization *** crystal morphology was observed by means of polarized optical microscopy（POM）and X-ray diffraction（XRD）.It was found that the addition of sebacic acid comonomer did not change the crystal form of nylon 10T,but significantly increased the number and decreased the size of spherulites.

关键词： melt polymerization nylon 10T nylon 10T/1010 semiaromatic polyamides crystallization kinetics isothermal crystallization

Structural Design Strategies of Polymer Matrix composites for Electromagnetic Interference Shielding:A Review

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2021年第11期13卷 322-350页

作者： Chaobo Liang Zhoujie Gu Yali Zhang Zhonglei Ma Hua Qiu Junwei Gu Key Laboratory of Functional Nanocomposites of Shanxi Province College of Materials Science and EngineeringNorth University of ChinaTaiyuan 030051China Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXian 710072China Research and Development Center Guangdong Suqun New Materials Co.LtdDongguan 523000China

With the widespread application of electronic communication technology,the resulting electromagnetic radiation pollution has been significantly *** matrix electromagnetic interference(EMI)shielding materials have disadvantages such as high density,easy corrosion,difficult processing and high price,*** matrix EMI shielding composites possess light weight,corrosion resistance and easy ***,the current polymer matrix composites present relatively low electrical conductivity and poor EMI shielding *** review firstly discusses the key concept,loss mechanism and test method of EMI *** the current development status of EMI shielding materials is summarized,and the research progress of polymer matrix EMI shielding composites with different structures is illustrated,especially for their preparation methods and ***,the corresponding key scientific and technical problems are proposed,and their development trend is also prospected.

关键词： Polymer matrix composites Electromagnetic interference shielding Structural design

Effects of Ti addition on corrosion behavior of Zr-based metallic glass in chloride medium

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2018年第6期25卷 650-657页

作者： Zhang-wei-jia Qiu Hua-meng Fu Hong-wei Zhang Hong Li Zheng-kun Li Long Zhang Zheng-wang Zhu Ai-min Wang Hai-feng Zhang School of materials Science and Engineering University ofScience and Technology of ChinaShenyang 110016 Liaoning China Shenyang National Laboratory for Material Science Instituteof Metal Research Chinese Academy of SciencesShenyang 110016 Liaoning China dongguan Eontec co. Ltd. Dongguan 523662 GuangdongChina Liaoning Jinyan Liquid Metal Technology co. Ltd.Shenyang 110100 Liaoning China

The effects of Ti element on the corrosion resistance of the metallic glass ***0.8 in aqueous solution with various chloride concentrations were investigated, and the effect mechanism was discussed. X-ray diffraction con-firmed that Ti-added ***0.8 metallic glasses with diameter of 3 mm were all metallic glasses. Weight loss and electrochemical method were introduced to characterize their corrosion resistance, and X-ray photo-electron spectroscopy study was used t9 characterize the passive film composition. The results show that the corrosion resistance of metallic glass is significantly improved with Ti addition, and Zr dioxides dominate in passive film during corrosion when Ti content is low. High Ti addition can lead to an obvious accumulation of Ti dioxides, which results in a thicker, Ti-enriched protective passive film.

关键词： Zr-based metallic glass Amorphous alloy Titanium corrosion resistance Electrochemical method corrosion behavior

Mass production of magnetocaloric LaFeMnSiB alloys with hydrogenation

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2017年第4期24卷 462-468页

作者： Tao Zhang Cheng-yong Wang Lugee Li Yong Zhang Cui-lan Liu Guangdong University of Technology Guangzhou 510006GuangdongChina dongguan Eontech co. Ltd.Dongguan 523662GuangdongChina State Key Laboratory of Advanced Metals and materials University of Science and Technology BeijingBeijing 100083China Baotou Research Institute of Rare Earth Baotou 014030Inner MongoliaChina

LaFe_（11.39）Mn_（0.35）Si_（1.26）B_（0.1）Hxalloys were prepared by *** were annealed at 1343Kfor30-90 hto form the NaZn13 ***-rich andα-Fe secondary phases were also *** hydrogenation at 553 Kand 0.15 MPa of H_2 pressure for 5hwas employed to improve the Curie temperature of the alloys to 279 *** maximum magnetic entropy change,relative cooling power,and adiabatic temperature change of LaFe_（11.39）Mn_（0.35）Si_（1.26）B_（0.1）H_x annealed at 1343 Kfor 90hafter hydrogen absorption are 6.38J/（kg·K）（magnetic changesμ0ΔH =1.65T）,100.1J/kg（μ0ΔH =1.65T）,and 2.2 K（μ0ΔH =1.48T）,*** the maximum magnetic entropy change of the LaFe_（11.39）Mn_（0.35）Si_（1.26）B_（0.1）H_x alloys is lower than those of similar alloys with high purity raw materials,the relative cooling power is nearly the *** effect of impurities of the raw materials used was also *** is assumed that the impurity of 0.2wt.% Al is responsible for the reduced entropy change of the resulted *** LaFe_（11.39）Mn_（0.35）Si_（1.26）B_（0.1）H_x alloys prepared by this method could be a low cost alternative material for room temperature magnetic cooling applications.

关键词： Magnetocaloric effect Annealing Hydrogenation Adiabatic temperature change Relative cooling power Maximum magnetic entropy change

corrosion behavior of additive-manufactured NiFeCrMo alloys in various corrosion media

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2023年第8期30卷 1574-1585页

作者： Dong-peng Wang Shuai Wang Zhen Chen Xing-cheng Xie Zhen-zhen Dong Hong-zhou Dong Yi-cheng Wu Zhen-guang Liu Wei-li Li Yu-xin Wang School of materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003JiangsuChina GRIMAT Engineering Institute co. Ltd.Beijing 101407China GRINM(Guangdong)Institute for new Advanced materials and Technology Dongguan 528041GuangdongChina School of Mechanical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003JiangsuChina

To understand the corrosion performance of additive-manufactured Ni-based in various corrosion media during the actual engineering application environment,the corrosion properties of NiFeCrMo alloys were investigated in 3.5 wt.%NaCl solution,1 mol/L H2SO_(4) solution,and 1 mol/L KOH solution,using potentiodynamic polarization and electrochemical impedance *** electrochemical measurement results revealed that the additive-manufactured NiFeCrMo alloys have higher corrosion resistance in all three solutions,compared with the as-cast *** results of the scanning electron microscope confirmed that the degree of additive-manufactured NiFeCrMo alloys after potentiostatic polarization in all three solutions is less serious.X-ray photoelectron spectroscopy analysis revealed that the enhancement of the corrosion resistance for the additive-manufactured NiFeCrMo alloys is attributed to the modification of the composition of the passive *** manufactured processing promotes the enrichment of the element of Cr or Mo in the passive film and it suppresses the formation of the oxidation of the element of Fe,leading to higher stability of the passive *** reason for the higher corrosion resistance of the additive-manufactured NiFeCrMo alloys was related to the enrichment of the element of Cr,as well as the lower content of the elements of Ni and Fe near the grain boundaries,which are beneficial to forming a more compact passive *** combined results are essential for the applications of high-strength Ni-based as structural materials in a corrosion environment.

关键词： Ni-based alloy Additive manufacturing corrosion Passive film corrosion media

Preparation and Properties of Water-soluble conjugated Polyelectrolyte

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(materials Science) 2014年第4期29卷 854-857页

作者：包祥俊 HONG Ruibin HU Jianhua ZHONG Yiping 刘平 DENG Wenji State Key Laboratory of Luminescent materials and Devices Research Institute of Materials Science South China University of Technology dongguan Bobaishun Petroleum Chemical co. Ltd. Department of Applied Physics South China University of Technology

The water-soluble conjugated polyelectrolyte, poly[3-（1′-ethyloxy-2′-N- methylimidazole）thiophene]（PEOIMT）, was prepared. Its photophysical and electrochemical properties, and response characteristics to the external condition（e g, temperature response, solvent response and pH response）, were investigated. The results show the PEOIMT belongs to the organic semiconductor. The interaction between the PEOIMT and the bovine serum albumin（BSA） was investigated using UV-vis spectroscopy. It was found that the PEOIMT could interact with the BSA. The PEOIMT can be used as a biosensor to detect the BSA.

关键词： conjugated polyelectrolyte responsive characteristic bovine serum albumin interaction biosensor

conductive microsphere monolayers enabling highly conductive pressure-sensitive adhesive tapes for electromagnetic interference shielding

在线全文

学校读者我要写书评

暂无评论

Advances in Manufacturing 2023年第2期11卷 212-221页

作者： Xi Lu Jin-Ming He Ya-Dong Xu Jian-Hong Wei Jian-Hui Li Hao-Hui Long You-Gen Hu Rong Sun Shenzhen Institute of Advanced Electronic materials Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518055GuangdongPeople's Republic of China Huawei Device(dongguan)company ltd. Dongguan523000GuangdongPeople's Republic of China

conductive adhesive tape is one kind of electromagnetic interference(EMI)shielding materials for electronic ***,the inferior conductivity of the pressure-sensitive adhesive(PSA)layer results in serious electromagnetic leakage at the conjunctions between the conductive tapes and target *** conductive fillers is a traditional method for highly conductive adhesive ***,the content of conductive fillers is needed to reach the percolation threshold,which is usually as high as tens of ***-content fillers result in significant loss of adhesive property and high fabrication ***,we introduce a rational architecture of conductive microsphere monolayer(CMM)in the PSA *** CMM connects the top and bottom surfaces of the PSA layer and improves its conductivity in the ***,low contents of conductive microspheres(≤5%(mass fraction,w))can achieve the target of conductivity improvement,but not result in the serious loss of the adhesive ***,the strategy of CMMs can balance the tradeoff between the conductivity and the adhesive property of conductive PSA ***,we demonstrate the superior EMI shielding performance of as-made conductive adhesive tapes,indicating their potential applications as the advanced EMI shielding materials in the electronic packaging.

关键词： Microsphere monolayer Pressure-sensitive adhesive(PSA) conductive tapes Electronic packaging Electromagnetic interference(EMI)shielding