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Defence Technology（防务技术） 2019年第3期15卷 450-456页

作者： Niwat Mookam Department of Industrial Engineering Technology Rajamangala University of Technology Rattanakosin Wang Klai Kangwon CampusHuahin

The aim of this research study was to determine optimal resistance spot brazing parameters for joining between AHSS and AISI 304 stainless steel by using filler metal. The key parameters investigated in this study consist of the brazing current, electrode pressure and brazing time. The Taguchi method was applied to the design of experiments. Signal-to-Noise ratio was introduced in the study to identify optimal levels from the process where input parameters yield increased shear strength. Brazing was thus implemented with 5,000A brazing current, 0.70 MPa electrode pressure, and 1.50s brazing time. The maximum shear strength obtained was 54.31 N·mm^-2 in accordance with input parameter settings. In addition, Cu-rich phase and Ag0.4Fe0.6 intermetallic phases were found at the interface zone.

关键词： Resistance spot brazing filler metal AHSS Stainless steel Intermetallic phases

Joining of SiO2 ceramic and TC4 alloy by nanoparticles modified brazing filler metal

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Chinese Journal of Aeronautics 2020年第1期33卷 383-390页

作者： Hong BIAN Yanyu SONG Duo LIU Yuzhen LEI Xiaoguo SONG Jian CAO State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001China Shandong Provincial Key Lab of Special Welding Technology Harbin Institute of Technology at WeihaiWeihai 264209China

Nano-Al2O3 particles modified Ag Cu Ni filler was adopted to braze the SiO2 ceramic and *** effects of filler size as well as the brazing temperature on the interfacial microstructure and mechanical property of the joints were *** filler reduced the phases dimension and promoted the homogeneous distribution of microstructure,obtaining a higher joint strength when compared to microscale *** increase of brazing temperature made the accelerating dissolution and diffusion of Ti,which promoted the increase of thickness of Ti4O7+TiSi2 layer adjacent to SiO2 ceramic and diffusion layer zone nearby TC4 *** hypoeutectic structure was produced in the brazing seam due to the high Ti *** maximum shear strength of^40 MPa was obtained at 950°C for 10 min.

关键词： Brazing Microstructure Nanoparticles modified filler SiO2 ceramic TC4

Influence of imidazolium ionic liquids as organic filler dispersant on electrical properties of chitin/epoxy composites

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High Voltage 2024年第4期9卷 930-938页

作者： Kai Yin Qihong Fan Jing Li Taqi ur Rahman Tianyin Zhang Ashish Paramane Xiangrong Chen School of Information and Electrical Engineering Hangzhou City UniversityHangzhouChina College of Electrical Engineering Zhejiang UniversityHangzhouChina State Grid Tianjin Power Chengnan District Supply Company TianjinChina Electrical Engineering Department National Institute of TechnologySilcharAssamIndia

Ionic liquid(IL)as the dispersant can help disperse the organic nanofillers to improve the performance of epoxy resin ***,the effect of IL on the electrical properties of epoxy composites is not well *** comprehensive study consists of the preparation,material characterisation and systematical investigation of electrical properties of 1-Butyl-3-methylimidazole hexafluorophosphate-modified chitin fibre/epoxy *** findings show that introducing IL into a chitin/epoxy composite can minimise porosity defects and improve the compatibility between filler and ***,a high concentration of IL induces severe charge injection into chitin/epoxy composites and internal electric field *** addition of 0.75%–1.5%mass fraction IL results in maximum enhancement in the AC breakdown strength of the chitin/epoxy composite(by~71%)compared with the non-IL *** nonlinear conductivity and non-uniform charge injection phenomena of IL-modified composites can be attributed to the movement of radicals and anions due to the decomposition of *** this study,it is highly expected that the organic filler dispersion in the epoxy matrix can be optimised by tuning IL to improve the insulation properties.

关键词： composites composite filler

Brazing temperature-dependent interfacial reaction layer features between CBN and Cu-Sn-Ti active filler metal

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Journal of Materials Science & Technology 2019年第10期35卷 2163-2168页

作者： Yonggang Fan Junxiang Fan Cong Wang School of Metallurgy Northeastern UniversityShenyang110819China Shenyang NEU New Industrial Technology Research Institute Co.LTD Northeastern UniversityShenyang110819China

CBN/Cu-Sn-Ti(CBN: cubic boron nitride) composites are prepared by active brazing sintering at 1123 K,1173 K, 1223 K and 1273 K, respectively. The effects of brazing temperature on the wettability, interfacial characteristics, and elemental distribution variations are fully investigated. When the brazing temperature is below 1223 K, completely uncoated and/or partially coated CBN particles with sharp edges can still be observed, and the reaction layer, mainly composed of Ti N and Ti B2, appears to be thin and *** the brazing temperature is 1223 K, all CBN particles are completely coated, suggesting that adequate wetting has taken place. Besides, as Ti diffuses thoroughly and enriches the interface, the reaction layer, filled primarily by Ti N, Ti B2 and Ti B, becomes thicker(about 1.30 μm), more uniform, stable and continuous. Further increasing the temperature to 1273 K is unnecessary or even harmful as the reaction layer thickness undergoes negligible change yet some tiny micro-cracks appear on the interface, which may likely deteriorate the grinding capability of the final brazing products.

关键词： Brazing temperature CBN/Cu-Sn-Ti filler metal Wettability Reaction layer

Evaluation of the Properties of Si3N4/Si3N4 Joint Brazed Using a filler Alloy Containing Pd

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Journal of Materials Science & Technology 2003年第z1期19卷 187-188页

作者： M. Naka Jie ZHANG Yu ZHOU Joining and Welding Research Institute Osaka University Ibaraki Osaka 567-0047 Japan School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China

Si3N4 ceramic was jointed to itself using a filler alloy of Cu76.5Pd8.5Ti15, and the mechanical properties of the jointwere measured and analyzed. By using a filler alloy of Cu76.5Pd8.5Ti15, the SisN4/SisN4 joints were obtained bybrazing at 1373～1473 K for 0.9～5.4 ks under a pressure of 2×10-3 MPa. The effect of brazing parameters on theshear strength of the joint was investigated. When the brazing temperature and holding time is 1423 K and 5.4 ksrespectively, the maximum shear strength of the Si3N4/Si3N4 joint is obtained to be 198 MPa.

关键词： Si3N4 ceramic, Active brazing, Ci-Pd-Ti filler alloy, Shear strength

Barium Titanate-reinforced Acrylonitrile-Butadiene Rubber: Synergy Effect of Carbon-based Secondary filler

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Chinese Journal of Polymer Science 2021年第6期39卷 725-735,I0007页

作者： Wannarat Chueangchayaphan Piyawadee Luangchuang Narong Chueangchayaphan Muhammad Azwadi Sulaiman Yeampon Nakaramontri Faculty of Science and Industrial Technology Prince ofSongkla UniversitySurat Thani Campus84000 Surat ThaniThailand Advanced Materials Research Cluster Faculty Bioengineering and TechnologyUniversiti Malaysia Kelantan17600JeliKelantanMalaysia Sustainable Polymer&Innovative Composite Materials Research Group Department of ChemistryFaculty of ScienceKing Mongkuts University of Technology Thonburi10140 BangkokThailand

Acrylonitrile rubber(NBR)composites filled with barium titanate(BT)were prepared using an internal mixer and a two-roll ***,a secondary filler,namely carbon nanotubes(CNT),was added in order to find a potential synergistic blend ratio of BT and *** cure characteristics,tensile and dielectric properties(dielectric constant and dielectric loss)of the composites were *** was found that NBR/BT composites with CNT secondary filler,at a proper BT:CNT ratio,exhibited shorter scorch time(ts1)and cure time(tc90)together with superior tensile properties and reinforcement efficiency,relative to the one with only the primary *** addition,the NBR/BT-CNT composite with 80 phr BT and 1–2 phr CNT had dielectric constant of 100–500,dielectric loss of 12–100 and electrical conductivity below 10−4 S/m together with high thermal ***,with a proper BT:CNT mix and filler loading,we can produce mechanically superior rubber composites that are easy to process and low-cost,for flexible dielectric materials application.

关键词： composites composite filler

Microstructures of brazing zone between titanium alloy and stainless steel using various filler metals

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中国有色金属学会会刊：英文版 2012年第S3期22卷 639-644页

作者： Taeshin CHUNG Jungsoo KIM Jeongseok BANG Byoungho RHEE Daegeun NAM Agency for Defense Development Korea Institute of Industrial Technology Vitzotech Corporation

Titanium alloy (Ti-Al-V alloy) substrate was brazed with stainless steel (STS304) using filler *** an optimized brazing condition,various filler metals were *** were observed at each *** metals were titanium based 40Ti-20Zr-20Cu-20Ni,silver based Ag 5Pd,and nickel based Ni-7Cr-3.1B-4.5Si-3Fe-0.06C (BNi2) and Ni-14Cr-10P-0.06C (BNi7).To select a good filler metal for brazing process,wetting test was performed at 880-1050 °*** was not brazed using silver based filler metals,but at the conditions using titanium and nickel based filler metals had brazed zone between titanium alloy and stainless ***,titanium alloy was eroded during brazing using titanium based filler *** based filler metal has a good brazed zone between titanium alloy and stainless steel among the filler metals.

关键词： brazing filler metal titanium alloy stainless steel

Optimising the electroluminescence performance of ZnS:Cu/epoxy composites via exploring the relationship between electroluminescence intensity and filler intrinsic attributes

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High Voltage 2022年第6期7卷 1099-1110页

作者： Wen Qi Miao Liu Siqi Chen Kun He Luxing Zhao Boyang Shen Xingming Bian State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijingChina China Electric Power Research Institute BeijingChina Electrical Engineering Division University of CambridgeCambridgeUK

Electroluminescent composites have considerable potential for applications in photoelectric display,electric field measurement and other fields due to their advantages of simple preparation and uniform ***,high voltage required by the operation of electroluminescent composites hinders their applications in the electric domain,and research on the relationship between electroluminescence principle of composites and filler intrinsic attributes is *** this paper,the effects of electric field strength,filler mass fraction and voltage frequency on the electroluminescence intensity of ZnS:Cu/epoxy composites are studied,which are majorly used as the luminescent layer of electroluminescent *** enhance the electroluminescence intensity of composites,high-temperature sintered BaTiO_(3)and zinc oxide whiskers(ZnOw)particles are introduced in the base *** finite element method is applied to verify that the matrix of high dielectric constant is in favour of improving the electroluminescence intensity of *** band structure of the ZnS:Cu particle is calculated based on the density functional theory+U method to analyse the intrinsic relationship between electroluminescence and particle electronic *** paper provides a basis for the research of high electroluminescence intensity devices and will be conducive to better understanding on the relationship between electroluminescence principle and filler intrinsic attributes.

关键词： composites ZnS:Cu filler

Cure of a New Type Composite on Noise Control and Effect of filler Modification

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Journal of Materials Science & Technology 2003年第z1期19卷 135-136页

作者： Jun CAI Fei XU Weimin CAI School of Municipal and Environment Englineering Harbin Institute of Technology Harbin150001china School of Environment Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China School of Environment Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China

A new type composite of high efficiency sound attenuation was cured. The superfine tungsten powder, plasticizerand stabilizer are added into the PVC resin and blended in the mixing chamber of a HAAKE rheometer. The effect ofthe filler modification is considered in the composite cure. The properties of modified composite and unmodified oneare studied by SEM morphology viewing, acoustic and mechanical measurement. The test results indicate that thereason of the better soundproof and mechanical properties is the particle uniform dispersion and stronger adhesion.

关键词： Composite, filler modification, Soundproof property, Mechanical property

Effects of Rare Earths on Properties of Ti-Zr-Cu-Ni Base Brazing filler Alloys

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Journal of Rare Earths 2004年第z1期22卷 214-217页

作者： Ma Tianjun Kang Hui Wu Yongqin Qu Ping School of Mechanical Engineering and Automation Beijing University of Aeronautics and Astronautics Beijing 100083 China School of Mechanical Engineering and Automation Beijing University of Aeronautics and Astronautics Beijing 100083 China School of Mechanical Engineering and Automation Beijing University of Aeronautics and Astronautics Beijing 100083 China School of Mechanical Engineering and Automation Beijing University of Aeronautics and Astronautics Beijing 100083 China

The effects of the addition of rare earths on the properties of Ti-Zr-Cu-Ni base brazing filler alloys and the mechanical microstructure and properties were studied for the brazed-joints in the vacuum brazing of TC4 by comparing synthetical properties of two kinds of filler *** results indicate that the filler metals added with rare earths have lower melting point, better wettability and higher mechanical properties in the brazing joints.

关键词： brazing filler alloys TC4 Ti-Zr-Cu-Ni rare earths