共搜索到3209条信息,每页显示10条信息,共321页。用时:0小时0分0秒390毫秒
. The experimental results show that there is a significant increase in β linked to the accumulation of persistent slip bands (PSBs) and micro-cracks at the early stages of fatigue life and reaches the maximum... mode with tension-tension and tension-compression. Key words: nonlinear ultrasonic; AZ31 magnesium alloy; fatigue damage; persistent slip bands 1 Introduction Fatigue life of metal parts can......
to the valence and conduction bands was discussed using theoretical and experimental evidence available. Key words:strontium aluminate; persistent luminescence; electronic structure; DFT calculation; rare...Electronic structure of the SrAl2O4:Eu2+ persistent luminescence material Mika Lastusaari1,Jorma H2,Janne Niittykoski3,Pavel Novák4,Taneli Laamanen3 (1.o;2.o)ls(a)(o;3.Department of Chemistry......
J. Cent. South Univ. Technol. (2008) 15(s1): 316-321 DOI: 10.1007/s11771-008-371-6 Prediction of shear bands in sand based on granular flow model and two-phase equilibrium ZHANG Yi-tong(张义同)1... interpretation of shear bands in sand as a bifurcation problem in continuum mechanics, shear bands in sand are considered as high-strain phase (plastic phase) of sand and the materials outside......
......
Electronic structure of the SrAl2O4:Eu2+ persistent luminescence materialJorma Hls1,2,Taneli Laamanen1,3,Mika Lastusaari1,2,Janne Niittykoski1,Pavel Novák41. Department of Chemistry, University... the density functional theory. The structure of the va- lence and conduction bands as well as the band gap energy of the material together with the position of the Eu2+ 4f7 8S7/2 ground state were......
or a scheme to resist fault slip. 2) In deeply buried areas, when tunnels pass through a fault zone, it is the displacement distribution in the shear bands of the fault zone that exerts the greatest... J. Cent. South Univ. (2020) 27: 2849-2863 DOI: https://doi.org/10.1007/s11771-020-4514-8 Distribution patterns of rock mass displacement in deeply buried areas induced by active fault creep slip......
Synchrotron radiation investigations of the Sr2MgSi2O7:Eu2+,R3+ persistent luminescence materials Pavel Novák1,Jukka Hassinen2,Mika Lastusaari3,Maria Malkam4,Janne Niittykoski2,Jorma Hd5,Taneli...)ki(a;5.o)ls(a)(o;6.a) Abstract:The electronic and defect energy level structure of polycrystalline Sr2MgSi2O7:Eu2+,R3+ persistent luminescence materials were studied with thermoluminescence......
Fabrication of ultrahigh density ZnO-Al2O3 ceramic composites by slip casting SUN Yi-hua(孙宜华)1, 2, XIONG Wei-hao(熊惟皓)2, LI Chen-hui(李晨辉)2 1. College of Mechanical and Material...; Abstract: The conditions of ZnO-Al2O3 aqueous suspensions and slip casting were optimized to obtain dense green compacts and further to obtain high......
Studies on Self-Luminous Material and Coating with Long Persistent Yellow-Green Afterglow 张明1,邱关明3,陈永杰1,孙彦彬1 (1.School of Material and Metallurgy, Northeast University, Shenyang 110006, China.... The primary factors which affect the coating properties were discussed. Key words:optics; solid luminescence; pigment and coating; long persistent self-luminescence; luminescent coating; rare earths; [全文......
高密度脉冲电流对Cu单晶体驻留滑移带的影响 李守新1,周亦胄2,吴世丁1,姚戈1,肖素红2,周本濂2 (1.中国科学院金属研究所材料疲劳与断裂国家重点实验室,沈阳,110015;2.中国科学院金属研究所,沈阳,110015;3.中国科学院国际材料物理中心,沈阳,110015) 摘要:对含驻留滑移带(PSB)的[123]取向的疲劳Cu单晶体,进行了高密度脉冲电流处理结果表明,高密度脉冲电流处理产生的热压应力改善了PSB-基体界面的应力集中状态,使驻留滑移带局部消失.理论计算同时表明,高密度脉冲电流处理能提高Cu单晶疲劳寿命. 关键词:驻留滑移带; 脉冲电流; 热压应力; [全文内容正......