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Spinodal分解始发形成调幅组织的强化机制徐祖耀1(1.上海市上海交通大学材料科学与工程学院)摘 要:总结了关于spinodal分解形成调幅组织,使合金强化机制的有限文献,发现合金时效后的屈服强度主要依赖于2个沉淀相的成分差(可由点阵常数差△a来表征)造成的应力场,而不依赖于调幅波长和沉淀相的体积分数.但时效过程中,合金的屈服强度与Δa的变化不呈线性关系.本文作者认为这和时效时调幅组织的周期性局部被破坏,使局部产生应力场的改变有关,提出屈服强度公式:σc=(MBΔa)/a,其中M包括Taylor因子(或Sc......
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Fabrication and structure characterization of ITO transparent conducting film by sol-gel technique LI Zhi-hua(李芝华)1, REN Dong-yan(任冬燕)2 1. School of Materials Science and Engineering, Central..., structure properties and physical properties (sheet resistance and transmittance) of the films were investigated by DTA-TG, XRD, SEM, four-probe method and UV-Vis spectrometry. The results indicate......
Structure and magnetic properties of new compounds CdYFeWO_7 MENG Jian1,Lü Minfeng1,WU Zhijian1 (1.State Key Laboratory of Application of Rare Earth Resources,Changchun Institute of Applied... determined using Ab initio method. Rietveld refinement of the powder XRD data showed that CdYFeWO_7 adopted cubic (Fd-3m) structure,while oxides crystallized in a defect-pyrochlore structure where both O......
Mechanical properties and structure of zirconia-mullite ceramics prepared by in-situ controlled crystallization of Si-Al-Zr-O amorphous bulk LIANG Shu-quan(梁叔全), ZHONG Jie(钟 杰), TAN... structure in which there are a lot of near equiaxed t-ZrO2 grains and fine yield-cracks has been developed in the samples with 15% zirconia addition treated at 1 150 ℃. This specific microstructure is much......
J. Cent. South Univ. (2018) 25: 681-689 DOI: https://doi.org/10.1007/s11771-018-3771-2 Comprehensive health assessment of shield tunnel structure based on prototype experiment LI Pan(李攀)1, ZHANG Ya... Abstract: Health state of shield tunnels is one of the most important parameters for structure maintenance. Usually, the shield tunnel is extremely long in longitude direction and composed by many segments......
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Phase structure of ZK60-1Er magnesium alloy compressed at 450 ?C WANG Zhong-jun(王忠军)1, YANG Qing-xiang(杨庆祥)2, QIAO Jun(乔 军)1 1. School of Materials Science and Metallurgy, University... 2010 Abstract: The phase structure of ZK60-1Er magnesium alloy thermally compressed at the temperature of 450 ?C and the strain rate of 1×10-4 s-1 was determined by transmission electron microscopy......
Structure and Transport Properties of La0.67Ca0.33Mn1-xAlxO3 张金仓1,韩雁冰2,葛洪良2,崔玉建2,贾广强1,王新燕1 (1.Department of Physics,Shanghai University,Shanghai 200436,China;2.Department of Applied Physics,China... is more suitable at T Key words:metal materials; structure and transport properties; Al3+substitution; La0.67Ca0.33MnO3; rare earths; [全文内容正在添加中] ......