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">Precipitation response of a recently developed b-type Ti–25Nb–2Mo–4Sn alloy(wt%) during aging was investigated in detail. Experimental results indicate that the metastable ω or equilibrium α phase can...Direct evidence for competition between metastable ω and equilibrium α phases in aged β-type Ti alloysShun Guo1,Qing-Kun Meng2,Hong-Ping Li1,Xin-Qing Zhao21. Institute for Advanced Materials,School......
, respectively. For a diffusion-controlled phase transformation, the concentrations at the interface approximate to the equilibrium values due to a very high interface mobility [15]. Under these circumstances, there is effectively local equilibrium at the interface. In a phase field model, a multicomponent multiphase system is characterized by the structural field parameter ηi and concentration field......
-phase region (Mo)+T2+D88. Isothermal section at 1 200 ℃ shows a similar topology at the Mo-rich region except that the (Mo)+T2+T1 phase equilibrium is more stable at 1 200 ℃ than that at 1 600... Application of phase diagram calculations to development of new ultra-high temperature structural materials YANG Ying(杨 莹)1, B.P. Bewlay2, CHEN Shuang-lin(陈双林)1, Y.A. Chang3 1. CompuTherm LLC......
; equilibrium η phase 1 Introduction 7000 series aluminum alloys are often called aeronautical materials due to their high specific strength. Recently, it is desirable to fabricate large structural... sensitivity of these alloys [6]. Quench sensitivity is primarily caused by heterogeneous precipitation of equilibrium η phase on dispersoids and (sub)grain boundaries during slow quenching, which decreases......
2017 Abstract: The adsorption of the bentonite toward Ni(II) from aqueous solution was studied to obtain optimum conditions, equilibrium model, thermodynamic and kinetic parameters. Statistical... were considered as effective parameters which should be examined. The increase of temperature has negative effect on the Ni(II) adsorption. The equilibrium data were correlated well with Freundlich......
Equilibrium of hydroxyl complex ions in Pb2+-H2O system WANG Yun-yan(王云燕)1, CHAI Li-yuan(柴立元)1, CHANG Hao(常 皓)1, 2, PENG Xiao-yu(彭小玉)1, SHU Yu-de(舒余德)1 1. School of Metallurgical Science...; Abstract: The thermodynamics equilibrium principle......
phase diagrams by means of the melting point free energy method, standard free energy of formation method and chemical equilibrium method. No assumptions and approximations were introduced. The eight...]. CALPHAD, 1999, 23: 165-172. [9] CHOU K C, CHEN S. Calculating activities from phase diagram containing equilibrium between solid and liquid solutions[J]. CALPHAD, 1990, 14: 41-48. [10] ZHANG Y......
THE EXTRACTION EQUILIBRIUM MODEL AND SIMULATION OF COUNTERCURRENT SOLVENT EXTRACTION OF Gd-Tb-Dy-HCl-HEH(EHP)-KEROSENE SYSTEM黄文梅摘 要:<正> The extraction equilibrium mathematic models for gadolinium,terbium and dysprosium in HCl-1.5mol/L HEH(EHP)system covering a relatively wide range of lanthanide concentration and acidity,havebeen developed.There......
(EPMA-EDS), and X-ray diffraction (XRD) have been used to identify the phase equilibrium and the composition of each phase in the alloys. As a result, the isothermal section of Mg-Zn-La system in Mg...=1.121-1.142 nm, c=0.950-0.977 nm. Key words:Mg-Zn-La system; Phase equilibrium; T-phase; Isothermal section; [全文内容正在添加中] ......
temperature, the order of the paraelectric/ferroelectric phase transition, the equilibrium polarization states, and the dielectric properties of the material[5]. The relationship between the misfit... possible phase. Then selecting the energetically most favorable thermo- dynamic state for each point of the misfit strain-external stress plane, we obtain the equilibrium phase diagrams of BT and PT......
