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Influence of ionic radius of rare-earths on the structural and electrical properties of Ba5RTi3Nb7O30(R=rare-earth) ferroelectric ceramicsPrasun Ganguly摘 要:In the present report,Ba5RTi3Nb7O30(R=La,Nd,Sm,Eu,Dy) compounds were synthesized by solid-state reaction method in order to know the effect of ionic radius of rare-earths on their structural......
. The gyration radius of the precipitation particles is 12.9 nm after aging at 175 ℃ for 180 h, and with the increase of aging time to 360 h, the gyration radius of precipitation particles increases... ℃ for 30 min show that precipitates exist and the gyration radius of precipitation is 2.5 nm, while gyration radius of the precipitates after aging at 225 ℃ for 30 min is 2.9 nm. Key words: magnesium......
Influences of fillet radius and draft angle on local loading process of titanium alloy T-shaped components ZHANG Da-wei, YANG He, SUN Zhi-chao, FAN Xiao-guang State Key Laboratory of Solidification... influences of geometric parameters on the T-shaped components local loading process, a new mathematical model considering the fillet radius and draft angle was established by using the slab method......
rate were investigated. Experimental results are presented, including primary and higher order dendrite arm spacings λ1, λ2, λ3 and dendrite tip radius R of primary Ni3Sn2 phase. Comparisons between...=44.957v-0.277, which is consistent with the Bouchard-Kirkaldy model; for the tertiary dendrites, λ3=40.512v-0.274; for the dendrite tip radius, R=22.7v-0.36. The experimental results also show......
. Then the effect of penetration, cutter radius change and installation radius on disc cutter wear rate was researched, and the prediction method of disc cutter’s lifetime was studied. The conclusion... almost linearly with the installation radius, and it increases with the increase of penetration and the decrease of disc cutter radius, and penetration is the most influential factor of wear rate......
in relation to the maximum principal stress present on the notch edge and assumes a crescent shape. The points belonging to the volume perimeter are obtained numerically. In the present contribution, the effects of notch radius and notch depth on the SED and the critical load are studied. The notch radius varies from 0.2 to 2.0 mm, and the notch depth varies from 5 to 7 mm. By using the SED approach......
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J. Cent. South Univ. (2017) 24: 2486 DOI: https://doi.org/10.1007/s11771-017-3660-0 Erratum to: Optimal selection of annulus radius ratio to enhance heat transfer with minimum entropy generation in developing laminar forced convection of water-Al2O3 nanofluid flow Siavashi Majid, Jamali Mohammad Applied Multi-Phase Fluid Dynamics Lab., School of Mechanical Engineering, Iran University of Science......
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