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A Back Look on the Binary Phase Diagrams of Metals from the Mass Action Law and the Coexistence Theory of Metallic Melts

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Journal of university of science and {2. Beijing 2001年第1期8卷 15-19页

作者： Jian Zhang Metallurgy school, university of {2. and technology Beijing, Beijing 100083, china Metallurgy school Univ. of Science/Technology Beijing Beijing 100083 China

According to the mass action law and the coexistence theory of metallic melts, the mass action concentrations of Cu-Mg, Bi-Tl and Ni-Al melts involving compound formation have been calculated. The calculated results show that, except the ultimate case of pure element, when two elements are present in the melts, all structural units (atoms and molecules) without exception will be present in the melts, i.e., their concentrations may change from great to small, but they will not vanish into nothing, and only under such conditions, the calculated results both agree with practice and obey the law of mass action. In view of that over considerable wide composition range, the activities of both elements of the three solid binary alloys mentioned above have been measured, this seems in contradiction with the present relevant phase diagrams, in which the structural units are determined by composition range, so the latter needs further investigation and consideration.

关键词： activity phase diagram the mass action law the coexistence theory

Calculating Model of Mass Action Concentrations for Mn-C Melts and Optimization of Thermodynamic Parameters

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International Journal of Minerals,Metallurgy and Materials 1998年第4期12卷 208-211页

作者： Jian Zhang(Metallurgy school, university of {2. and technology Beijing, Beijing 100083, china) Metallurgy school University of Science and Technology Beijing Beijing 100083 China

Based on the phase diagram, the coexistence theory of the metallic melt structure involving compoundformation and the regularity of melts containing saturated phase, a calculating model of mass action concentrationsfor Mn-C melts was formulated. According to the activities (or activity coefficients AM. and γc.), obtained by theUnified Interaction Parameter Model (UIPM), the thermodynamic parameters G and G at higher temperatures (162.～1873 K) were optimized by the repeated try and error method. It is testified that G G(873～12.3 K) and G (2.8～162. K), obtained at lower temperatures, can also be used at the above-mentionedhigher temperatures. The calculated N. and N agree well with ac. and ac obtained by UIPM. This result showsthat the deduced model can reflect the structural reality of Mn-C melts.

关键词： Mn-C melts activity coexistence theory mass action concentration

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缓凝砂浆螺旋输送试验研究

铁道学报 2004年第2期26卷 86-90页

作者：张建辉王起才李怀东薛德胜兰州大学物理科学与技术学院甘肃兰州730000 兰州交通大学机电与动力工程学院甘肃兰州730070 兰州飞控仪器总厂设备分厂甘肃兰州730070

缓凝砂浆是应用于预应力混凝土构件中的一种新型材料,它由水、水泥、砂和复合缓凝剂按一定比例搅拌而成。本文在试验研究的基础上,运用流变学理论,建立了缓凝砂浆螺旋输送物理模型,对缓凝预应力筋包覆装置的螺旋输送与包裹机构的工作机... 详细信息

缓凝砂浆是应用于预应力混凝土构件中的一种新型材料,它由水、水泥、砂和复合缓凝剂按一定比例搅拌而成。本文在试验研究的基础上,运用流变学理论,建立了缓凝砂浆螺旋输送物理模型,对缓凝预应力筋包覆装置的螺旋输送与包裹机构的工作机理进行了分析与研究,得出了缓凝砂浆连续输送的条件,解决了缓凝砂浆螺旋输送的可靠性问题,为缓凝预应力筋包覆装置的工程化奠定了基础。试验证明了理论分析的正确性。

关键词：缓凝材料螺旋输送过程分析预应力筋制作装置

Calculating Models of Mass Action Concentrations for Ni-Mn and Co-Mn Melts and Optimization of Their Thermodynamic Parameters

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International Journal of Minerals,Metallurgy and Materials 2000年第4期14卷 246-250页

作者： Jian Zhang (Metallurgy school, university of {2. and technology Beijing, Beijing 100083, china) Metallurgy school University of Science and Technology Beijing Beijing 100083 China

According to phase diagrams, measured activities as well as the coexistence theory of motallic melts structure involving compound formation, the calculating models of mass action concentrations for Ni-Mn and Co-Mn melts are formulated and their thermodynamic parameters are optimized. As a result, the calculated mass action concentrations agree well with the corresponding measured activities, showing that these models can reflect the structural characteristics of both Ni-Mn and Co-Mn melts.

关键词： activity metallic melts coexistence theory mass action concentration

Bell violation for the thermal states of an XXZ spin chain with Dzialoshiski-Moriya interaction

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science china(Physics,Mechanics & Astronomy) 2010年第11期53卷 2074-2079页

作者： MA XiaoSan 1 & WANG AnMin 2.1 school of Electric Engineering and Information,Anhui university of {2.,Maanshan 2.3002.china 2.Department of Modern Physics,university of science and {2. of china,Hefei 2.002.,china school of Electric Engineering and Information Anhui University of Technology Maanshan China Department of Modern Physics University of Science and Technology of China Hefei China

The effect of Dzialoshiski-Moriya (DM) interaction on the violation of Bell inequality for thermal states of interacting qubits via a two-qubit XXZ spin chain is *** results imply that the DM interaction and anisotropy taking a large positive value can enhance the Bell violation and improve the threshold temperatures of *** the comparison between the Bell violation and thermal entanglement,we find that the threshold temperatures of thermal entanglement are higher than those of the Bell *** implies that some states are entangled but the Bell inequality is not violated.

关键词： Bell violation threshold temperatures DM interaction

Calculating Models of Mass Action Concentrations for Fe-P and Cr-P Melts and Optimization of Their Thermodynamic Parameters

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International Journal of Minerals,Metallurgy and Materials 1999年第3期13卷 174-177页

作者： Jian Zhang(Metallurgy school, university of {2. and technology Beijing, Beijing 100083, china) Metallurgy school University of Science and Technology Beijing Beijing 100083 China

Based on the phase diagrams, reliable reference experimental data and the coexistence theory of metallic melts structure involving compound formation, calculating models of mass action concentrations for Fe-P and Cr-P melts have been formulated. At the same time, some of their thermodynamic parameters have been optimized. The calculated results not only agree well with the measuredvalues, but also obey the mass action law rigorously, this in turn shows that these models can reflect the structural characteristics of corresponding melts.

关键词： activity phase diagram coexistence theory mass action concentration

Calculating Model of Mass Action Concentrations for Fe-Cr-P Melts and Optimization of Thermodynamic Parameters

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International Journal of Minerals,Metallurgy and Materials 1999年第1期13卷 11-14页

作者： Jian Zhang (Metallurgy school, university of {2. and technology Beliing, Beijing 100083, china) Metallurgy school University of Science and Technology Beijing Beijing 100083 China

According to the results of research on the thermodynamic propelles of Fe-Cr, Fe-P and Cr-P melts, the measured achvihes of Fe-Cr-P melts from reference sources as well as the coexistence theory of metallic melts structure involving compound formation, a calculating model of the mass action concentrations for Fe-Cr-P melts has been formulated and some of its thermodynamic parameters have been optimized. The calculated mass action concentrations agree with the measured achvities, which shows that this model can reflect the structural reality of Fe-Cr-P melts.

关键词： activity dephosphorization of stainless steel, coexistence theory mass action concentration

Microstructural Features During Strain Induced Ferrite Transformation in 08 and 2.Mn Steels

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Journal of university of science and {2. Beijing 2001年第2期8卷 105-110页

作者： Ping Yang, Feng-e Cui, Fuming Wang (Materials science and Engineering school, {2. of science and technology Beijing, Beijing 100083, china) (Metallurgy school, {2. of science and technology Beijing, Beijing 100083, china) Materials Sci. and Eng. school University of Science and Technology Beijing 100083 China

The microstructure evolution during strain induced ferrite transformation was followed in thermal-simulation tests of clean 08 and 2.Mn steels. The influences of carbon equivalence and initial austenite grain size on ferrite grain refinement and the volume fraction of ferrite during straining were inspected. The results revealed that the accelerating effect of ferrite transformation by strain was increased as the carbon equivalence decreased. However, finer ferrite grains were obtained at higher carbon content. At strain of similar to1.5 ferrite grains less than 3 mum and 2.mum can be obtained in 08 and 2.Mn steels respectively. Whereas the ferrite grain refinement in 08 steel was due to both effects of strain induced transformation and ferrite dynamic recrystallization, that in 2.Mn was mainly due to strain induced transformation. Heavy strain can produce fine ferrite grains in coarse austenite grained 08 steel, but it would lead to band microstructure in coarse austenite grained 2.Mn.

关键词： clean carbon steel strain induced transformation grain refinement ferrite dynamic recrystallization

Time-Delayed Feedback Control in a Single-Mode Laser System

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Communications in Theoretical Physics 2007年第12期48卷 1055-1058页

作者： GU Xiao-Hui ZHU Shi-Qun WU Dan school of physical {2. and technology,Suzhou university,Suzhou 2.5006,china school of physical {2. and technology Suzhou University Suzhou 215006 China

The effects of time-delayed feedback control in a single-mode laser system is *** the smalltime delay approximation,the analytic expression of the stationary probability distribution function of the laser field *** mean,normalized variance and skewness of the steady-state laser intensity are *** is found thatthe time-delayed feedback control can suppress the intensity fluctuation of the laser *** numerical simulationsare in good agreement with the approximate analytic results.

关键词： time-delayed feedback single-mode laser stationary probability distribution function