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Journal of Materials Science & Technology 2022年第18期113卷 261-270页

作者： Bowen Zhang Chuantong Chen Takuya Sekiguchi Yang Liu Caifu Li Katsuaki Suganuma The Institute of Scientific and Industrial Research Osaka UniversityIbaraki-shiOsaka 567-0047Japan School of electrical and electronic engineering Tiangong UniversityTianjin 300387China Central Research Center Research and Development DivisionTOPPAN FORMS CO.LTD1-2-6 Owada-choHachioji-shiTokyoJapan School of materials and state key laboratory of optoelectronic materials and technologies Sun Yat-sen UniversityShenzhen 518107China

In this paper,by proposing a novel and low-cost Ag salt paste,a robustly and large-area(35×35 mm^(2))bare Cu to Cu bonding was realized under a low sintering pressure of 0.8 MPa and a low sintering temperature of 300℃ in air atmospheric *** relationship between the bonding strength and microstructure changes of sintered Ag under various bonding conditions was investigated in *** large-area bonded plate exhibits low porosity about 10%and low percentage of voids,which result in ultra-high bonding strength over 58 *** importantly,the introduction of reducing agent formic acid(CH_(2)O_(2))and the low porosity successfully improve the anti-oxidation of novel Ag salt paste during sintering process,result in pure Cu-Ag-Cu *** cross-section of the Ag joints was obtained to explain the bonding pattern,in which Cu was oxidized only at the edge of the sintering interface,and no Cu oxide generated in middle bonding *** development of novel Ag salt paste successfully addresses the energy-intensive process and low bonding strength faced by large-scale sintering,which greatly promotes the high-temperature applications of power device.

关键词： Large-area bonding Anti-oxidation Cu-cu joint Ag salt paste bonding strength

bonding strength of Invar/Cu clad strips fabricated by twin-roll casting process

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Transactions of Nonferrous Metals Society of China 2018年第12期28卷 2460-2469页

作者： Peng CHEN Hua-gui HUANG Ce JI Xu ZHANG Zhong-hua SUN National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan UniversityQinhuangdao 066004China College of Mechanical Engineering Yanshan UniversityQinhuangdao 066004China Iron and Steel Research Institute of HBIS Group Shijiazhuang 052165China

Based on traditional twin-roll casting process,Invar/Cu clad strips were successfully fabricated by using solid Invar alloy strip and molten Cu under conditions of high temperature,high pressure and plastic deformation.A series of tests including tensile test,bending test,T-type peeling test and scanning electron microscope(SEM)and energy dispersive spectrometer(EDS)measurements were carried out to analyze the mechanical properties of Invar/Cu clad strips and the micro-morphology of tensile fracture surfaces and bonding *** results indicate that no delamination phenomenon occurs during the compatible deformation of Invar/Cu in bending test and only one stress platform exists in the tensile stress-strain curve when the bonding strength is *** the contrary,different mechanical properties of Invar and Cu lead to delamination phenomenon during the uniaxial tensile test,which determines that two stress platforms occur on the stress-strain curve of Invar/Cu clad strips when two elements experience *** average peeling strength can be increased from13.85to42.31N/mm after heat treatment at800℃for1h,and the observation of the Cu side at peeling interface shows that more Fe is adhered on the Cu side after the heat *** above illustrate that heat treatment can improve the strength of the bonding interface of Invar/Cu clad strips.

关键词： twin-roll casting Invar/Cu clad strip heat treatment bonding interface bonding strength

bonding strength of graded anti-corrosive coatings of fluoroethylenepropylene (FEP)/polyphenylene sulfide (PPS)

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Journal of University of Science and Technology Beijing 2005年第6期12卷 572-576页

作者： Jie Bian Weiqiang Wang Congsheng Guan Yonghui Zhao School of Materials Science and Engineering Shandong University Jinan 250061 China School of Mechanical Engineering Shandong University Jinan 250061 China School of Chemical Technology Shandong University Jinan 250061 China

Fluororesin-based anti-corrosive coatings including graded FEP/PPS were prepared on carbon steel by melt powder coating, the bonding strength of all coating systems was determined by the pull-off test. It is found that the poor adhesion of fluororesin coatings to metallic substrates is improved obviously by the graded coating structure of FEP/PPS, and the bonding strength reaches up to 11.8 MPa for the five-layer system. Examination by electron probe microanalysis （EPMA） verifies that the distribution of main components is graded in the five-layer system, which is responsible for the enhancement of the interfacial bonding.

关键词： fluororesin anti-corrosive coating graded coating structure polyphenylene sulfide (PPS) bonding strength

bonding strength in carbon steel sandwich panels under condition of diffusion-rolling with small reduction

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Journal of Central South University of Technology 2005年第4期12卷 393-395页

作者：刘靖韩静涛付定梅 School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China School

One of the key problems by diffusion-rolling bonding with small reduction for carbon steel plates is the bonding assistant coat. Abonding assitant coat used below 850℃ was developed. It contained copper as basic element and zinc as main alloy element. Other small elements and rear metals were added to decrease the melting point and to obtain a better clouding and bigh plasticity. Based on the theory of brazing and transient liquid diffusion welding, two carbon steel plates were rolled with small reduction by using self-made bonding assistant coat. Temperature, pressure and holding time are the main technology parameters for controlling the process of diffusion-rolling. The results show that the bonding strength is the greatest when the bonding temperature is 830℃, holding time is 3 min and the reduction rate is 9%.

关键词： honding assistant coat diffusion-rolling steel sandwich panels bonding strength

Effects of cerium on microstructure and bonding strength of Cu-14Al-4.5Fe bronze plasma sprayed coating

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Journal of Rare Earths 2011年第4期29卷 363-369页

作者：李文生路阳袁柯祥苑重光 State Key Laboratory of Advanced Nonferrous Metal Materials Lanzhou University of Technology

Cu-14Al-4.5Fe bronze powders with and without 0.6% Ce were prepared and their coatings were fabricated on 45# carbon steel substrate by atmospheric plasma spraying. The effects of rare earth Ce on the coating interface bonding strength, coatings and bonding interface vertical sections microstructure were investigated by tensile machine, X-ray diffraction analysis, scanning electron microscopy （SEM） and electronic probe microanalysis （EPMA）. The results showed that the shape of powders was more spherical like, and the coating’s hardness and interface bonging tensile strength would be improved to 8.9% and 17.4%, respectively, higher than that of the Cu-14Al-4.5Fe coating without 0.6% Ce added. The refined of κ phases, well distributed matrix phases in coatings and the promotion of Fe, Al elements diffusion led to the improvement in interface bonding strength and hardness of the Cu-14Al-4.5Fe coating with addition of 0.6% Ce, which hardened and strengthened the coating.

关键词： rare earth Cu-14Al-4.5Fe alloy microstructure bonding strength rare earths

Improvement of bonding strength of Horizontal Twin-Roll Cast Steel/Aluminum Clad Sheet by Electromagnetic Fields

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Acta Metallurgica Sinica(English Letters) 2018年第1期31卷 55-62页

作者： Gang Chen Jin-Tao Li Guang-Ming Xu Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern University School of Mechanical Materials and Mechatronic Engineering University of Wollongong

Electromagnetic field is an available online method to increase bonding strength of clad sheet manufactured by horizontal twin-roll casting （HTRC）. In this paper, an electric current pulse （ECP） and a complex field （static magnetic field （SMF） together with ECP） are exerted during HTRC of steel/aluminum clad sheet. The produced clad sheet has good appearance, and no visible defects exist at the bonding interface. The inter-diffusion zone at Fe/A1 interface in ECP and SMF＋ECP sheets is 3 and 4 μm, respectively, and the latter increases slightly compared with that in non-field sheet. The average peel strengths （APS） of ECP and SMF＋ECP sheet are 14 and 21 N/mm, respectively, which increase by 2 and 9 N/mm compared with 12 N/mm of non-field sheet. The APS increment in SMF＋ECP sheet is resulted from the increment of interface bonding spots and the enhancement of inter-diffusion zone width.

关键词： Clad sheet Twin-roll casting Electromagnetic field bonding strength

Interfacial bonding strength of TiN Film Coated on Si_3N_4 Ceramic Substrate

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Journal of Materials Science & Technology 2007年第4期23卷 487-490页

作者： Dejun KONG Yongkang ZHANG Zhigang CHEN Jinzhong LU Jiangsu Key Laboratory of Oil ＆： Gas Storage and Transportation Technology Jiangsu Polytechnic University Changzhou 213016 China Department of Materials Science and Engineering Jiangsu Polytechnic University Changzhou 213016 China School of Mechanical Engineering Jiangsu University Zhenjiang 212013 China

The fraction of TiN/Si3N4 in the cross section was observed with scanning electric microscope （SEM）, and residual stresses of TiN coated on the surface of Si3N4 ceramic were measured with X-ray diffraction （XRD）.The hardness of TiN film was measured, and bonding strength of TiN film coated on Si3N4 substrate was measured by scratching method. The formed mechanism of residual stress and the failure mechanism of the bonding interface in the film were analyzed, and the adhesion mechanism of TiN film was investigated preliminarily. The results show that residual stresses of TiN film are all behaved as compressive stress, and TiN film is represented smoothly with brittle fracture, which is closely bonded with Si3N4 substrate. TiN film has high hardness and bonding strength of about 500 MPa, which could satisfy usage requests of the surface of cutting Si3N4 ceramic.

关键词： TiN film bonding strength X-ray diffraction (XRD) Residual stress ceramic substrate

Effect of Curing Regime on bonding strength of EVA Modified Mortar to Tile

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Journal of Wuhan University of Technology(Materials Science) 2010年第2期25卷 346-348页

作者：何代华 School of Materials Science & Engineering University of Shanghai for Science Technology Key Laboratory of Advanced Civil Engineering Materials Ministry of Education Tongji University

Ethylene-Vinyl Acetate （EVA） redispersible powder and latex were used to modify mortar. Three kinds of curing regimes： standard curing, high temperature curing and freeze-thaw circle curing were adopted to cure the bonded samples. bonding strength of EVA modified mortar was tested at 28 days. The development of bonding strengths under all three curing regimes were discussed and compared. The experimental results show that bonding strength increases with the increase of EVA content in mortar. The curing regime used within 28 days is critical according to the bonding strengths values under three curing regimes for different ages. The reasons of that the EVA can improve the bonding strength were analyzed.

关键词： EVA redispersible powder latex bonding strength curing regime

Additive manufacturing of steel–copper functionally graded material with ultrahigh bonding strength

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Journal of Materials Science & Technology 2021年第13期72卷 217-222页

作者： Chaolin Tan Youxiang Chew Guijun Bi Di Wang Wenyou Ma Yongqiang Yang Kesong Zhou School of Mechanical and Automotive Engineering South China University of TechnologyGuangzhou 510640China National Engineering Laboratory for Modern Materials Surface Engineering Technology Institute of New MaterialsGuangdong Academy of SciencesGuangzhou 510651China Singapore Institute of Manufacturing Technology A*STAR73 Nanyang Drive637662Singapore

Additive manufacturing enables processing of functionally graded materials(FGMs)with flexible spatial design and high bonding strength.A steel-copper FGM with high interfacial strength was developed using laser powder bed fusion(LPBF).The effect of laser process parameters on interfacial defects was evaluated by X-ray tomography,which indicates a low porosity level of 0.042%***/fine dendritic grains in the interface are incited by high cooling rates,which facilitates interface *** mechanical tests evaluate the bonding reliability of interface;and the fatigue tests further substantiate the ultrahigh bonding strength in FGMs,which is superior to traditional manufacturing *** of the high interfacial bond strength were also discussed.

关键词： Laser powder bed fusion Steel–copper multi-materials Fatigue Functionally graded materials bonding strength

The effect of zirconium coating on bonding strength of porcelain to titanium

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China Welding 2008年第3期17卷 10-14页

作者：段珍珍孙大千邱小明谷晓燕孙德新 School of Materials Science and Engineering Jilin University The Amour Technology Institute of PLA

The Zr coating was deposited on titanium surface using the magnetron sputtering technique. Effects of Zr coating on microstructure and mechanical properties of porcelain fired to titanium have been investigated. The results show that interdiffusion of elements occurs during porcelain firing, and the Zr coating can effectively protect titanium surface from excess oxidation. The strength of bond zone with Zr coating deposited for 1 hour reaches 29. 7 MPa, which has increased by 26.4% as compared with that of bond zone without coating （23.5 MPa）.

关键词： titanium porcelain Zr coating bonding strength