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Structural transition of Ni-Mn-Ga ferromagnetic shape memory alloy particles prepared by ball milling CHEN Feng(陈 枫), TIAN Bing(田 兵), LI Li(李 莉), ZHENG Yu-feng(郑玉峰) Center... transformation of Ni49.8Mn28.5Ga21.7 alloy particles prepared by planetary ball milling (PBM) and vibration ball milling (VBM) were investigated by SEM, XRD and DSC. The results show that the particles......
Creep behavior on Ag particle reinforced SnCu based composite solder joints YAN Yan-fu(闫焉服), ZHU Jin-hong(朱锦洪), CHEN Fu-xiao(陈拂晓), HE Jun-guang(贺俊光), YANG Di-xin(杨涤心) School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, China Received 1 December 2005; accepted 23 March 2006 Abstract: SnCu solder is one of the most promising substitutes......
Microstructures and properties of Sn-Ag-Cu lead-free solder alloys containing La ZHOU Ying-chun(周迎春), PAN Qing-lin(潘清林), HE Yun-bin(何运斌), LIANG Wen-jie(梁文杰) LI Wen-bin(李文斌), LI Yun-chun(李运春... utilized to improve the melting behaviors, microstructures, tensile properties and microhardness of Sn-3.0Ag-0.5Cu lead-free solder alloy. La has little effect on the melting behavior......
J. Cent. South Univ. (2018) 25: 1799-1812 DOI: https://doi.org/10.1007/s11771-018-3870-0 Structure design and characteristics analysis of a cylindrical giant magnetostrictive actuator for ball... automatic adjustment of the double-nut ball screw preload, a magnetostrictive ball screw preload system is proposed. A new cylindrical giant magnetostrictive actuator (CGMA), which is the core component......
General issues of FEM in backward ball spinning of thin-walled tubular part with longitudinal inner ribs JIANG Shu-yong(江树勇), REN Zheng-yi(任正义), WU Bin(吴 滨), WU Gui-xiang(武桂香) Engineering...; Abstract: Backward ball spinning was applied for manufacturing thin-walled tubular parts with longitudinal inner......
Effect of post annealing on phase transformation of Ni-Mn-Ga ferromagnetic shape memory alloy particles prepared by ball milling TIAN Bing(田 兵), CHEN Feng(陈 枫), LI Li(李 莉), ZHENG... annealing on the phase transformation of Ni52Mn24Ga24 ferromagnetic shape memory alloy particles prepared by ball milling was studied. Ni52Mn24Ga24 alloy particles at micron scale were prepared......
J. Cent. South Univ. (2017) 24: 1992-2000 DOI: https://doi.org/10.1007/s11771-017-3608-4 Integral sliding mode control for flexible ball screw drives with matched and mismatched uncertainties... Germany 2017 Abstract: The design of servo controllers for flexible ball screw drives with matched and mismatched disturbances and uncertainties is focused to improve the tracking performance......
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; 金属间化合物; mechanical alloying; high energy ball milling; AuSn alloy; solder; intermetallic compound; [全文内容正在添加中] ......
高能球磨制备金锡合金钎料 李才巨1,陶静梅1,徐孟春1,朱心昆1 (1.昆明理工大学,材料与冶金工程学院,昆明,650093) 摘要:采用高能球磨法制备金锡共晶合金钎料,研究球磨后样品的微观组织随球磨时间的演变规律.XRD的检测结果表明,随着球磨时间的延长,球磨后的样品中依次出现ε相(AuSn_2),δ相(AuSn)和ζ相(Au_5Sn)等金属间化合物,出现顺序与合金化程度密切相关.SEM及EDX的观察结果表明,随着球磨时间的延长,单质Au粉与Sn粉之间实现了充分的合金化,标志粉末处于焊合过程中的河流状变形带的密度逐渐降低,最后趋于消失,组织整体均匀性提高,获得了成分均匀的共晶合金. 关键词:金属材料; 金锡合金; 钎料; 高能球磨; 机械合金化; 金属间化合物; metal material; Au-Sn alloy; solder; high energy ball......
