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near the defects or soft phases, which ends by the pinning usually in the same place. Therefore, pinning near the nucleation centers are the dominant coercivity mechanism for both exchange-coupled...A hybrid coercivity mechanism for exchange-coupled nanocomposite permanent magnetsLei Qiu1,Li Zhao1,Xiaojiao Weng1,Laichuan Shen1,Guoping Zhao1,2,3,Fang Wang2,Linhua Xie11. College of Physics......
near the defects or soft phases, which ends by the pinning usually in the same place. Therefore, pinning near the nucleation centers are the dominant coercivity mechanism for both exchange-coupled...A hybrid coercivity mechanism for exchange-coupled nanocomposite permanent magnetsLei Qiu1,Li Zhao1,Xiaojiao Weng1,Laichuan Shen1,Guoping Zhao1,2,3,Fang Wang2,Linhua Xie11. College of Physics......
Theory of Nucleation on Dislocations雍岐龙摘 要:<正> Cahn’s theory of nucleation on dislocationshas been analyzed thoroughly and the imperfectionof the theory in some cases has been discussed.Arevised theory has been proposed with applicationto the problem of precipitation of M(CN)phase inaustenite.关键词:......
is relative to the heterogeneous nucleation of carbon-containing cores in the melt. When Mn content is low and dissolves into the melt, the nucleating potent of carbon-containing cores would not be influenced...: magnesium alloy; Mn; grain refinement; heterogeneous nucleation Mg-Al系合金是目前工业中使用量最大的镁合金系列.但该类镁合金的铸造件在生产过程中常常由于初生枝晶过分粗大,导致疏松,偏析,热裂等铸造缺陷的发生[1-3].因此,控制得到细致均匀的等轴晶组 织是改善Mg-Al系合金铸造性能和提高合金铸锭质量的重要途径.研究表明[3-4],杂质元素如......
the thaumasite formation. No evidences support the heterogeneous nucleation route in this work. It is concluded that the method mentioned in this work can surely be used to investigate the mechanism of thaumasite...Mechanism of Thaumasite Formation in Concrete宋远明1,ZHOU Shaolong1,WANG Zhijuan1,WANG Bo1,钱觉时21. School of Environmental and Materials Engineering, Yantai University2. School of Materials Science......
metallurgy processing which was protected by active flux. The recrystallization temperature and nucleation mechanism of the alloy were studied by means of hardness tests, observations of optical microscopy... effect of highly disperseded Al3(Sc,Zr) particles on dislocations and sub-grain boundaries. The recrystallizing process reveals itself the nucleation mechanism of the alloy involving not only the sub......
. Through a preliminary study on the growth mechanism of the product, it is found that the generation of the plate-like Mg5(CO3)4(OH)2.4H2O could be explained by two-dimensional nucleation/step growth mechanism. Key words: plate-like; basic magnesium carbonate; template-mediated/homogeneous precipitation; two-dimensional nucleation; step growth Cite this article as: CHEN Juan, HUANG Zhi-liang, CHEN......
investigated [14]. Generally, two distinct approaches have been assumed for the mechanism of the nucleation: 1) particles paradigm, and 2) solute paradigm. The former suggests that the nucleation occurs... refin efficiency. Key words: Al-5Ti-B alloy; grain refinement; casting; inoculation; nucleation 1 Introduction It is well known that an equiaxed grain structure manifests more enhanced mechanical......
Hydration Mechanism of Silica Fume- sulphoaluminate CementHE Zhen1,YANG Huamei1,HU Shuguang2,LIU Meiyan11. State Key Laboratory of Water Resources & Hydropower Engineering Science,Wuhan University2... mechanism of SF on SAC were investigated. The experimental results showed that SF was proved to be beneficial for SAC system, in terms of setting time and late strength gain. Evidence of accelerator......
for grain refinement and the undissolved AlB2 particles is the indirect nucleating base for subsequent α(Al) phase. Key words: Al-3B master alloy; hypoeutectic Al-Si alloys; nucleation mechanism; grain... Grain refining mechanism of Al-3B master alloy on hypoeutectic Al-Si alloys LIU Yuan1, 2, DING Chao2, LI Yan-xiang1, 2 1. Key Laboratory for Advanced Materials Processing Technology of Ministry......