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preparation technology was developed. It has some advantages of lightweight, high thermal conductivity, low thermal expansion, high strength, near-net forming and so on. Also, its CTE can be adjusted.../Al composites have a low density of 2.93 g/cm3, and its relative density is 98.7%. Thermal conductivity of the composites is 175 W/(m·K), coefficient of thermal expansion (CTE) is 10.3×10-6 K-1......
Experimental Research on Laser Clad Forming and Its Micro-Crackles Controlling Sun K1,ZHOU K G C1,SONG J L1,DENG Q L1 (1.Shanghai Jiaotong University, Shanghai 200030, P. R. China) 摘要:Laser clad forming (LCF)is a new kind of rapid manufacturing technology. It can directly manufacture compacted metal components and has many advantages. Some experimentalresearches have been carried out......
. Accordingly, the thermal conductivities of bottom center and walls are 107.6 and 131.5 W/(m·K), the coefficients of thermal expansion (CTE) are 7.9×10-6 and 10.6×10-6 K-1, respectively. The flexural strength... thixoforming; thermal conductivity; coefficient of thermal expansion 1 Introduction The packaging box is an important structural part used for integrated circuit (IC) seal and signal transmission......
FERROELECTRIC CHARACTERISTICS OF SrBi2Ta2O9 THIN FILMS ANNEALED IN FORMING GAS A.D.Li1,N.B.Ming1,D.S.Wang2,Z.G.Liu1,D.Wu1,T.Yu2,A.Hu2 (1.Department of Material Science and Engineering & National..., China) Abstract:The degradation behavior of SrBi2 Ta2O9 (SBT) thin filras annealed in forming gas (5%H2+95%N2) was investigated. The ferroelectric remnant polarization Pr of SBT had a severe decrease......
Thermal expansion behavior of a β-LiAlSiO4/Cu compositeWANG Lidong, XUE Zongwei, LIU Zhe, and FEI Weidong School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China摘 要:A copper matrix composite reinforced by β-LiAlSiO4 with negative thermal expansion coefficient was fabricated using vacuum hot-pressed sintering......
J. Cent. South Univ. Technol. (2008) 15: 581-587 DOI: 10.1007/s11771-008-0109-5 Numerical simulation and experimental investigation of incremental sheet forming process HAN Fei(韩 飞), MO Jian... sheet forming (ISF) through both experimental and numerical approaches, a three-dimensional elasto-plastic finite element model (FEM) was developed to simulate the process and the simulated results were......
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COMPUTER AIDED ANALYSIS FOR COLD ROLL FORMING THIN CHANNEL SECTION Z.W.Han1,C.LIN2,L.Q.Ren1,Y.Q.Nie3 (1.Key Laboratory of Terrain Machine Bionic Technology, Jilin University, Changchun 130025, China;2.Institute of Rolling Mill, Yanshan University, Qinhuangdao 066004, China;3.Mechanics Department, Jilin University, Changchun 130025, China) Abstract:Cold roll forming is a complicated metal......
Crystal structure and thermal expansion of perovskites containing uranium (VI) and rare-earth elements Nikolai Chernorukov1,Aleksandr1,Anna Ershova1 (1.Nizhny Novgorod State University,Gagarin... was discovered. By means of high-temperature X-ray diffraction, phase transitions were studied and thermal expansion coefficients were determined. Key words:perovskite; uranium; X-ray diffraction; Rietveld......
Optimization of press bend forming path of aircraft integral panel YAN Yu(阎 昱), WAN Min(万 敏), WANG Hai-bo(王海波), HUANG Lin(黄 霖) School of Mechanical Engineering and Automation, Beihang...; Abstract: In order to design the press bend forming path of aircraft integral panels, a novel optimization method was proposed, which......
