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Search Results: 1 - 10 of 292 matches for " ternary peritectic "
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Core-shell microstructure formed in the ternary Fe-Co-Cu peritectic alloy droplet
FuPing Dai,BingBo Wei
Chinese Science Bulletin , 2009, DOI: 10.1007/s11434-009-0103-9
Abstract: The metastable liquid phase separation occurs in the ternary Cu50Fe37.5Co12.5 peritectic alloy droplets during free fall. The separated alloy melt rapidly solidifies and evolves core-shell microstructure composed of L1(Cu) and L2(Fe,Co) phases. Based on the determination of the phase transition temperature, the core-shell microstructure evolution, the interfacial energy, the temperature gradient and the Marangoni migration are analyzed. The interfacial energy of the separated liquid phase increases with the decrease of the temperature. The temperature gradient changes from large to small along the radius direction from inside to outside in the alloy droplet. The Marangoni force (F M) acting on the micro-droplet of L2(Fe,Co) phase increases with the increase of the size of the L2(Fe,Co) phase, and decreases with the increase of undercooling. Driven by F M, the micro-droplet of L2(Fe,Co) phase migrates from outside to inside in the alloy droplet, collides and coagulates each other during migration, and then forms different types of core-shell microstructures.
Core-shell microstructure formed in the ternary Fe-Co-Cu peritectic alloy droplet

FuPing Dai,BingBo Wei,

科学通报(英文版) , 2009,
Abstract: The metastable liquid phase separation occurs in the ternary Cu50Fe37.5Co12.5 peritectic alloy droplets during free fall. The separated alloy melt rapidly solidifies and evolves core-shell microstructure composed of L1(Cu) and L2(Fe,Co) phases. Based on the determination of the phase transition temperature, the core-shell microstructure evolution, the interfacial energy, the temperature gradient and the Marangoni migration are analyzed. The interfacial energy of the separated liquid phase increases with the decrease of the temperature. The temperature gradient changes from large to small along the radius direction from inside to outside in the alloy droplet. The Marangoni force (F M) acting on the micro-droplet of L2(Fe,Co) phase increases with the increase of the size of the L2(Fe,Co) phase, and decreases with the increase of undercooling. Driven by F M, the micro-droplet of L2(Fe,Co) phase migrates from outside to inside in the alloy droplet, collides and coagulates each other during migration, and then forms different types of core-shell microstructures. Supported by the National Natural Science Foundation of China (Grant Nos. 50121101, 50395105) and NPU Youth Scientific and Technological Innovation Foundation (Grant No. W016223)
Potentiometric Determination of Stability Constants of Sulphathiazole and Glycine-Metal Complexes  [PDF]
Awad A. Al-Rashdi, A. H. Naggar, O. A. Farghaly, H. A. Mauof, A. A. Ekshiba
American Journal of Analytical Chemistry (AJAC) , 2018, DOI: 10.4236/ajac.2018.93009
Abstract: Binary and ternary complexes of (Fe(III), Pb(II), Co(II), Al(III), La(III), Sr(II), Cr(III), Ti(II) and Zr(II)) with sulphathiazole (as primary ligand) and amino acid glycine (as secondary ligand) have been studied potentiometrically at 25°C ± 0.1°C and I = 0.1 M NaClO4 in 25% (v/v) pure ethanol-water medium. Although there are many methods available to study the stability of metal-ligand complexes, pH-metry is most frequently used. In extension of our study on solution equilibria, we used Calvin-Bjerrum method for the calculation of stability constants. Stoichiometries and stability constants of binary systems containing the above metal ions in a 1:1 and 1:2 and/or 1:3 ratios were also determined to compare the effect of the secondary ligand on (1:1) Metal:Sulphathiazole system. The protonation constants of the complexes were evaluated for the system M:Sulphathiazole:Glycine = 1:1:1. The order of stability of the binary and ternary complexes was examined. It was found that glycine adds preferably [M-Sulfathiazole] rather than to the aqueous complexes of metal ions. In all cases 1:1:1 complex was formed.
Preparation and Characterization of Binary and Ternary Blends with Poly(Lactic Acid), Polystyrene, and Acrylonitrile-Butadiene-Styrene  [PDF]
Kotiba Hamad, Mosab Kaseem, Fawaz Deri
Journal of Biomaterials and Nanobiotechnology (JBNB) , 2012, DOI: 10.4236/jbnb.2012.33040
Abstract: Binary and ternary blends of poly(lactic acid) (PLA), polystyrene (PS) and acrylonitrile-butadiene-styrene (ABS) were prepared using a one-step extrusion process. Rheological and mechanical properties of the prepared blends were determined. Rheological properties were studied using a capillary rheometer, shear rate, shear stress, non-Newtonian index, shear viscosity and flow activation energy were determined. Mechanical properties were studied in term of tensile properties, stress at break, strain at break, and Young’s modulus were determined. The effect of the composition on the rheological and mechanical properties was investigated. The results show that the ternary blend exhibits shear-thinning behavior over the range of the studied shear rates where the true shear viscosity of the blend decreases with increasing true shear rate, also it was found that the true viscosity of the blend decreases with increasing ABS content. The mechanical results showed that, in the most cases, the stress at break and the Young’s modulus improved by the addition of ABS.
Photoluminescence Compounds ZnGa2Se4 and ZnGa2Se4: Eu2+  [PDF]
Oktay Tagiyev, Saida Asadullayeva, Gurban Eyyubov, Ulvi Kasumov, Kenan Tagiyev
Journal of Modern Physics (JMP) , 2012, DOI: 10.4236/jmp.2012.38108
Abstract: Photoluminescence (PL) spectra measurements have been carried out in the ternary chalcopyrite semiconductor compounds ZnGa2Se42Se4: Eu2+ using single-wavelength excitation of a Hg lamp with λ = 365 and 375 nm. Measurements were performed at the temperature range of (120 ~ 220 K) and (110 ~ 230 K) for ZnGa2Se4 and ZnGa2Se4:Eu2+, respectively. No PL was observed for both crystals at the temperatures higher than 220 K (ZnGa2Se4) and 230 K (ZnGa2Se4:Eu2+). At temperatures lower than ~220 K and ~230 K one and three lines were observed for ZnGa2Se4 and ZnGa2Se4: Eu at 591 nm and 566, 591, 646 nm, respectively. 566 nm line was assigned as due of the 4f65d→ 4f7 (8S7/2) transition of Eu2+ ions, whereas the rest two lines were attributed to the donor-acceptor recombination pairs. Probability of non-radiation transfers (A = 108 ~109 s-1), energy of optical phonons (hω= 25 ~ 30 meV), Huan Rice parameter (S = 8 ~ 10), energy of thermal quenching (△E = 0.02 ~ 0.06 eV) were determined from the tem-perature dependences of the full width at half maximum (FWHM = Г(T)).
On The Ternary Quadratic Equation
M.A.GOPALAN,V.SANGEETHA,MANJU SOMANATH
International Journal of Innovative Research in Science, Engineering and Technology , 2013,
Abstract: The ternary quadratic Diophantine equation 5(x^2+y^2 )-9xy=19z^2 is analyzed for its patterns of non zero distinct integral solutions.
Binary and Ternary Complexes of Arteether β-CD - Characterization, Molecular Modeling and in Vivo Studies  [PDF]
Renu Chadha, Sushma Gupta, Natasha Pathak, Geeta Shukla, D.V.S. Jain, Raghuvir R S Pissurlenkar, Evans C Coutinho
Pharmacology & Pharmacy (PP) , 2011, DOI: 10.4236/pp.2011.23030
Abstract: The purpose of the present work is to improve the antimalarial activity of arteether through enhancing its solubility subsequently bioavailability by incorporating the drug into the cyclodextrins cavity. The effect of hydrophilic polyvinyl propylene (PVP) polymer on the complexation and solubilizing efficiencies of cyclodextrins (CDs) is also elucidated. Inclusion of arteether molecule in solid state was evidenced by Differential scanning calorimeter (DSC), Powder X-ray diffractometery (PXRD), and in solution state by NMR and solution calorimetry. A 1:1 stoichiometry was proposed by the phase solubility studies both in presence and absence of PVP. The most plausibe mode of inclusion of arteether into the CD cavity is revealed by molecular modeling studies utalizing Fast Rigid Exhaustive Docking acronym. Solution calorimetry was used further to confirm 1:1 stiochiometry in presence or absence of PVP by determining the enthalpy of interaction between the drug and cyclodextrins. The inclusion of drug was found to be exothermic process accompanied by small positive value of entropy (ΔSo). The methylated-β-CD showed the best ability to solublize arteether which is approximately at par with β-CD in the presence of PVP. Better complexation efficiency of β-CD in presence of PVP is also reflected by the higher numerical values of stability constant (K). Compelete eradication of the parasite from the blood and highest anti-malarial pharmacological activity was observed in the complexes of arteether with M-?-CD while 83.7% was observed for ternary complexes of β-CD in presence of PVP.
Short Circuit Thermally Stimulated Discharge Current Measurement on PMMA:PEMA:PVDF Ternary Blends  [PDF]
A. K Gupta, A. Tiwari, R Bajpai, J. M Keller
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.28141
Abstract: The attainment of a better understanding and improvement of electrical properties of ternary blend is a task of particular scientific and economic importance. Ternary films of Poly (methylmethacrylate), Poly (ethlymathacrylate) and poly (vinlylidenefluoride) were prepared using solution cast technique. Thereafter, to study the hetro charges, homo-charges and interfacial charge formation in ternary system, the short circuit thermally stimulated discharge current (SC-TSDC) measurements were carried out on bilaterally metallized electrets. The ternary blend samples taken for the present investigations are hetrogeneous system involving three polymers differing in their conduction behaviour and dielectric property. Thus, unequal ohmic conduction currents arriving at the interface are expected to result in accumulation of charges at the interface or the Maxwell-Wagner effect. Clearly the Maxwell Wagner effect is expected to contribute discernibly to the observed TSDC’s of the ternary blends. The PMMA: PEMA: PVDF:: 100:100:50 blend exhibits highest tendency while 100:50:100 the least, towards the anomalous current flow. Moreover, the conductivity of 100: 100: 50 is found to be more and, therefore, a large amount of homocharge is injected leading to anomalous current.
A Family of 4-Point n-Ary Interpolating Scheme Reproducing Conics  [PDF]
Mehwish Bari, Ghulam Mustafa
American Journal of Computational Mathematics (AJCM) , 2013, DOI: 10.4236/ajcm.2013.33031
Abstract:

The n-ary subdivision schemes contrast favorably with their binary analogues because they are capable to produce limit functions with the same (or higher) smoothness but smaller support. We present an algorithm to generate the 4-point n-ary non-stationary scheme for trigonometric, hyperbolic and polynomial case with the parameter for describing curves. The performance, analysis and comparison of the 4-point ternary scheme are also presented.

The 4-Point α-Ary Approximating Subdivision Scheme  [PDF]
Abdul Ghaffar, Ghulam Mustafa, Kaihuai Qin
Open Journal of Applied Sciences (OJAppS) , 2013, DOI: 10.4236/ojapps.2013.31B1022
Abstract:

A general formula for 4-point α-Ary approximating subdivision scheme for curve designing is introduced for any arity α≥2. The new scheme is extension of B-spline of degree 6. Laurent polynomial method is used to investigate the continuity of the scheme. The variety of effects can be achieved in correspondence for different values of parameter. The applications of the proposed scheme are illustrated in comparison with the established subdivision schemes.

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