共搜索到3606条信息，每页显示10条信息，共361页。用时：0小时0分0秒296毫秒
composites is greatly enhanced, but the electrical conductivity of the composites is seriously reduced. Key words: Cu-B alloys; Cu matrix composites; modification effect; microstructures 1 Introduction... in Cu-6Al-0.75B master alloy. Fig. 2 EDS analysis results of primary B Fig. 3 Phase diagram of Cu-B alloy The above results demonstrate that Al has a significant modification effect on eutectic B phase in Cu-B......
Characteristic of involute slope modification of asymmetric spur gearDENG Xiao-he(邓小禾), HUA Lin(华林), HAN Xing-hui(韩星会) (School of Automotive Engineering, Hubei Key Laboratory of Advanced Technology... of the asymmetric gear for both sides were deduced, and the equations of contact ratio and the key points of contact were also obtained. Meanwhile, an involute slope modification method considering the effects......
......
; 文章编号:1672-7207(2007)02-0190-05 Modification and electrochemical properties of LaNi4.25Al0.75 coated with porous SiO2 LI Wei1, 2, 3 (1. State Key Laboratory...; electrochemical properties; modification LaNi5(AB5)具有吸/放氢性能好,易活化及特殊的热效应等优点,可应用于氢的贮运,镍氢电池的负......
application and model modification in prediction of open-pit mine blasting vibration parameters LUO Xuedong1, FAN Xinyu1, DAI Zhenwei2, MEI Nianfeng1, YAN Sutao1 (1. Engineering Research Center of Rock... than that obtained by Sadowsky formula. Key words: mining slope; blasting vibration; BP neural network; model modification 中深孔爆破作业在铁矿露天开采过程中起着重要作用,但其所产生的震动效应亦会对周围岩体和建筑结构产生危害,合理地预测爆破振动参数可以为灾害的防治提供重要参考.在......
......
Trans. Nonferrous Met. Soc. China 20(2010) s943-s947 Electro-pulse modification and reheating process for production of thixotropic microstructure in AlSi7Mg alloy TIAN Wen-tong(田文彤)1... Industrial University, Jinzhou 121001, China Received 13 July 2010; accepted 25 June 2010 Abstract: Electro-pulse modification (EPM) was used to change the dendritic structure of AlSi7Mg alloy to globular......
concentrated Co2+ solutions decreases from 73×10-6 to 30×10-6, realizing the selective separation of Ni. Key words: nickel and cobalt; adsorption; selective separation; chitosan; modification Foundation item......
Preparation of nanocrystal modificator and its modification mechanism DONG Tian-shun(董天顺), CUI Chun-xiang(崔春翔), LIU Shuang-Jin(刘双进), YANG Wei(杨 薇), LIU Fu-cai(刘福才) School of Materials Science... effect of Cu-P master alloy. Key words: Cu-P master alloy; ZL109 alloy; melt-spin; rapid solidification; nanocrystal; modification; refinement......
......
