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Effect of Nano-silica Modification on the Tensile Property of SMA/GF/CF/Epoxy Super Hybrid Woven Fabric Composites赵世成1,梁文彦1,WANG Zhenqing1,LEI Hongshuai21. College of Aerospace and Civil Engineering, Harbin Engineering University2. College of Engineering, Peking University摘 要:Tensile properties of epoxy casts together with shape memory alloy(SMA), glass......
is directly related to the precipitation of particles enriched Cu, Ni and Mn. Key words: ZA27 alloy; Mn-Ni alloying; super plasticity; mechanical property alloy LU Yun-hai, ZHAO Pin, SHEN Huan-xiang (College of Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China ) Abstract: The effect of Mn and Ni......
Rolling route for refining grains of super light Mg-Li alloys containing Sc and Be CHIANG Chih-Te, LEE Shyong, CHU Chun-Lin Department of Mechanical Engineering, National Central University... at 350 °C, cold rolling with 60% thickness reduction and 250 °C annealing, successively. Key words: Mg-Li alloy; beryllium; scandium; solid solution strengthening ......
快速super twisting算法及其在飞翼布局无人机姿态控制上的应用谭健1,周洲1,祝小平2,许晓平11. 西北工业大学无人机特种技术重点实验室2. 西北工业大学无人机研究所摘 要:通过在super twisting算法中增加线性项,提出一种快速super twisting算法,并采用Lyapunov方法证明了受扰快速super twisting算法具有比受扰super twisting算法更优良的收敛特性.将该算法应用于存在干扰的飞翼布局无人机姿态控制,设计快速super twisting观测器以实现对干扰的快速估计和补偿.仿真结果表明,在相同的控制器参数下,相比super twisting观测器,快速super twisting观测器的收敛速度更快,可提高姿态控制系统的鲁棒性.关......
Localized Corrosion Behavior of 6% Mo Super Austenitic & 316L Stainless Steels in Low pH 3% NaCl SolutionM.M.A.Gad,H.G.Salem,A.M.Nasreldin,H.Sabry,A.A.EI-Sayed摘 要:<正>Electrochemical techniques were applied to study the crevice corrosion resistance of two types of stainless steel alloys namely, conventional 316L and 6% Mo super austenitic......
Invar合金与Si3N4陶瓷钎焊接头界面组织和性能研究王颖1,杨振文1,2,张丽霞2,冯吉才21. 天津大学天津市现代连接技术重点实验室2. 哈尔滨工业大学先进焊接与连接国家重点实验室摘 要:采用Ag Cu Ti活性钎料对Invar合金和Si3N4陶瓷进行钎焊连接,研究了接头界面组织及其形成机制,分析了钎焊工艺参数对接头界面结构和性能的影响.结果表明,钎焊过程中液态钎料中的活性元素Ti与Si3N4陶瓷发生反应,在陶瓷界面形成致密的Ti N和Ti5Si3反应层;同时,Invar合金向液态钎料中溶解,与活性元素Ti反应生成脆性的Fe2Ti和Ni3Ti化合物.钎焊温度和保温时间影响Si3N4陶瓷界面反应层的厚度以及接头中Fe2Ti和Ni3Ti脆性化合物的形成量和分布,这两方面共同决定着接头的抗剪强度.当钎......
4J42 Invar合金粉末注射成形工艺研究 林冰涛1,曲选辉1,程彤1,段柏华1,何新波1 (1.北京科技大学,材料科学与工程学院,北京,100083) 摘要:以羰基Fe,Ni粉为原料,蜡基聚合物为粘结剂,采用粉末注射成形技术制备了4J42 Invar合金零件.研究了粉末注射成形Invar合金的脱脂及烧结工艺.结果显示:"溶剂脱脂+热脱脂"工艺能有效快速地实现粘结剂的完全脱除;经1350℃氢气烧结,可以获得致密度98.5%,30~300 ℃内平均热膨胀系数为4.5×10-6 K-1,漏气率＜1.4×10-9 Pa·m3·s-1的PIM 4J42 Invar合金.金相显微组织及XRD分析表明合金为单一稳定的奥氏体(γ相)组织. 关键词:粉末注射成形; Invar合金; 热膨胀性; 电子封装材料; [全文内容正在添加中] ......
Preparation of electrolytic copper powders with high current efficiency enhanced by super gravity field and its mechanism WANG Ming-yong(王明涌)1, 2, WANG Zhi(王 志)1, GUO Zhan-cheng(郭占成)1, 3 1... of Ecological and Recycle Metallurgy, University of Science and Technology Beijing, Beijing 100083, China Received 6 July 2009; accepted 18 January 2010 Abstract: Super gravity field was employed......
Dynamic response characteristics of super high-rise buildings subjected to long-period ground motionsCHEN Qing-jun(陈清军)1, YUAN Wei-ze(袁伟泽)1, LI Ying-cheng(李英成)1, CAO Li-ya(曹丽雅)2(1. State Key... characteristics of different types of seismic waves and dynamic response characteristics of super high-rise building structures under long-period ground motions were comparatively analyzed. First, the ground......
Electrochemical preparation of the Fe–Ni36 Invar alloy from a mixed oxides precursor in molten carbonatesYan-peng Dou,Di-yong Tang,Hua-yi Yin,Di-hua WangSchool of Resource and Environmental Sciences, Wuhan University摘 要:The Fe–Ni36 alloy was prepared via the one-step electrolysis of a mixed oxides precursor in a molten Na2 CO3–K2 CO3 eutectic melt......
