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as the operation frequency field for the ultrasonic motor. Fig.7 Displacement shapes of W2L11 model according to changes in frequency in mode 3 Fig. 8 Relationship between resonance and operation... at frequencies close to the resonance frequency. A frequency field of approximately 10 kHz generating up to 1.5 μm magnitude of displacement is determined to be the operation frequency field of the ultrasonic......
Effects of Ultrasonic Field on Microstructures and Properties of Semi-solid AZ91D Magnesium Alloy陈国平Mechanical Engineering Institute, Hunan Industry University(Zhuzhou)Mechanical and Electrical Engineering Institute, Nanchang University摘 要:The microstructure distribution rule of semi-solid AZ91D alloy treated by ultrasonic was researched, and mechanical......
of the polymethyl methacrylate(PMMA), polypropylene(PP) and nylon66(PA66) under different process parameters and ultrasound field conditions. The results show that ultrasonic plasticization can... melt increases slightly and changes reversibly. Key words: ultrasound plasticization; polymer; melt mass flow rate; ultrasonic vibration field 微纳制造技术正成为世界关注的焦点.微注射成型因具有低生产成本,高成型精度和易于自动化生产等优点而成为微纳制造关键技......
, the particles size decreases with extending of ultrasonic radiation time. The bubbles produced by ultrasonic field are radiated by ultrasonic at the same time. The impact effect of the cracked bubbles... Synthesis of ZnS nanoparticles by solid-liquid chemical reaction with ZnO and Na2S under ultrasonic SHE Yuan-yuan(佘媛媛)1, 2, YANG Juan(杨 娟)1, QIU Ke-qiang(丘克强)1 1. School of Chemistry and Chemical......
steel cracking. Quenching with ultrasonic agitation or in the presence of electrical and magnetic fields provide uniform agitation leading to improved uniformity of the stress fields within the metal... cycle to achieve a wide range of cooling profiles not readily achievable with quenchants and more traditional agitation systems currently in use. 关键词:heat treatment; agitation uniformity; ultrasonic......
Mechanism and Kinetic Model of In-situ TiB2/7055Al Nanocomposites Synthesized under High Intensity Ultrasonic Field陈登斌,赵玉涛School of Materials Science and Engineering,Jiangsu University摘 要:In-situ TiB2/7055Al nanocomposites are fabricated by in situ melt chemical reaction from 7055Al-K2TiF6-KBF4 system under high intensity ultrasonic field......
performance, they are widely used in the field of optics, micro-electronics, biomedicine, inertial confinement fusion (ICF), aerospace and national defense [1–4]. Ultrasonic vibration assisted grinding... J. Cent. South Univ. (2018) 25: 277-286 DOI: https://doi.org/10.1007/s11771-018-3736-5 Surface roughness prediction model in ultrasonic vibration assisted grinding of BK7 optical glass ZHAO Pei-yi......
Crystallization behavior of electroless Co-Ni-B alloy plated in magnetic field in presence of cerium XUAN Tian-peng(宣天鹏), ZHANG Lei(章 磊), HUANG Qin-hua(黄芹华) Institute of Materials Science...: The electrochemical property, chemical composition and crystal structure of electroless Co-Ni-B-Ce alloy plated in general state as well as in magnetic field were studied using potentiometer, plasma......
Localization system for mobile robot using scanning laser and ultrasonic measurement LIU Kai(刘凯)1, SUN Zeng-qi(孙增圻)1, AN Bin(安斌)2 (1. Department of Computer Science & Technology, Tsinghua... and position information for the robot. Then, a novel scanning laser and ultrasonic absolute positioning system was developed to eliminate the accumulative error in dead reckoned robot heading......
Numerical simulation of acoustic pressure field for ultrasonic grain refinement of AZ80 magnesium alloy SHAO Zhi-wen, LE Qi-chi, ZHANG Zhi-qiang, CUI Jian-zhong Key Laboratory of Electromagnetic... pressures on the behaviors of cavitation bubble in the melt were studied. The ultrasonic field propagation in the melt was also characterized. The results show that samples from different positions......