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超声场作用下Al-Si合金的除气效果及晶粒细化 张忠涛1,李廷举1,李捷2,马晓东1,郄喜望1 (1.大连理工大学材料科学与工程学院三束材料改性国家重点实验室,大连,116024;2.大连理工大学原材料特种制备重点实验室,大连,116024) 摘要:在不同的恒温条件下,对Al-Si合金熔体进行不同时间的超声处理,当超声处理时间为60 s时,试样含气量显著降低,除气效果明显.在Al-Si合金凝固过程中施加超声场,晶粒发生球化,细化现象;在Al-Si合金凝固区间恒温条件下施加超声场,晶粒发生细化但未发生球化现象.超声场作用下Al-Si合金晶粒细化主要是由于空化泡破碎产生的过冷生核所造成的. ......
in the molybdenum metallurgical industry, the ultrasound electro-oxidation process was proposed to strengthen the oxidative decomposition or leaching of mo- lybdenum. Laboratory work was carried out......
photocatalytic performance of photocatalysts is closely related to their synthesis methods.High-intensity ultrasound irradiation could provide a unique tool for fabrication of photocatalysts with novel......
power ultrasound is introduced to Zr46.75Cu46.75Al6.5bulk metallic glass(BMG)as an easy-procurable,non-destructive physical method to modulate its atomic rearrangement and shear deformation behavior.The......
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successfully acquire changing signal of oil-water two-phase flow. By analyzing the experiment data, the attenuation of the amplitude of transmission mode ultrasound test voltage is found to have relationship with phase volume fraction and phase velocity. For different quantities of water, ultrasound test voltages increase first and then decrease with the increase of oil contents. In water in oil......
Vision, Hunan Normal University, Changsha 410081, China;2. College of Physics and Information Science, Hunan Normal University, Changsha 410081, China)Abstract:High intensity focused ultrasound (HIFU... that the temperature in focus area increases faster while the initial sound pressure and thermal conductivity increase. The absorption coefficient is smaller, the ultrasound intensity in the focus area......
, 等. 超声和压力耦合场对Al-Cu合金的作用机理及显微组织影响[J]. 中国有色金属学报, 2021, 31(7): 1818-1826. DOI: 10.11817/j.ysxb.1004.0609.2021-36595 LIN Bo, LIN Chi-hao, FAN Tao, et al. Effect of ultrasound vibration and pressure... L, HOBSON D, CHAPELON J Y, et al. High intensity focused ultrasound optimal device design for targeted prostate cancer treatment: a numerical study[J]. Journal of Modern Physics, 2013, 4(2): 240-245......
kHz ultrasound, the coating qualities are improved, whereas 30 kHz has an opposite effect. 关键词:plasma spray; arc- ultrasonic; thermal barrier coating; morphology; [全文内容正在添加中] ......
distribution of a carbon nanotubes(CNTs)-based modifying additive to construction materials in an aqueous medium. This problem was solved herein by using surfactants and ultrasound. The sonication......