scholarly journals Experimental studies and thermodynamic assessment of the Ba-Mo-O system by the CALPHAD method

Author(s):  
A.L. Smith ◽  
M. Rutten ◽  
L. Herrmann ◽  
E. Epifano ◽  
R.J.M. Konings ◽  
...  
2008 ◽  
Vol 595-598 ◽  
pp. 473-481 ◽  
Author(s):  
Ibra Diop ◽  
N. David ◽  
J.M. Fiorani ◽  
Renaud Podor ◽  
Michel Vilasi

The knowledge of the quinary Pb–Bi–O–Fe–Hg is necessary for understanding the degradation mechanisms of the T91 steel used as structural material in future ADS nuclear reactors. In this device, the steel will be in direct contact with the liquid spallation target (which is constituted by lead or lead-bismuth eutectic) surrounded by a reduced oxygen pressure atmosphere. In the present work, the characterization of the pseudo-binary PbO–Fe2O3 cut has been performed. In order to complete the available data in the literature, some experimental investigations by DTA, isothermal annealing, SEM and EPMA have been done. These results have allowed proposing a thermodynamic assessment using the Calphad method by the ThermoCalc software.


2013 ◽  
Vol 43 (1) ◽  
pp. 176-186 ◽  
Author(s):  
Md. Arifur Rahman ◽  
Chia-Wei Fan ◽  
Shin-Ju Wang ◽  
Cheng-En Ho ◽  
Wojciech Gierlotka

2006 ◽  
Vol 45 ◽  
pp. 1925-1930
Author(s):  
I. Drouelle ◽  
Sylvie Chatain ◽  
Christine Guéneau ◽  
Philippe Zeller ◽  
Didier Hamon ◽  
...  

To better understand the formation of solid, liquid and gas phases between the Al-Li-O ceramics and zirconium (Zr) at temperatures above 1273 K, we built a thermodynamic database on the Al-Li-O-Zr quaternary system using the CALPHAD method. An accurate knowledge of both phase diagram and thermodynamic data of all the binary and ternary sub-systems is necessary to understand the phase relations in the quaternary. The thermodynamic descriptions of both Al-Li-Zr and Al-O-Zr ternary systems are presented. In addition, the Li-Al-O-Zr system was experimentally investigated using diffusion couples made of [ Zr / AlxLiyOz ] and [ ZrO2 / AlxLiyOz ] between 1373 K and 1573 K. The experimental results are compared with activity diagrams calculated with the thermodynamic database.


RSC Advances ◽  
2016 ◽  
Vol 6 (65) ◽  
pp. 60101-60108 ◽  
Author(s):  
Erika M. Dematteis ◽  
Elsa Roedern ◽  
Eugenio R. Pinatel ◽  
Marta Corno ◽  
Torben R. Jensen ◽  
...  

The LiBH4–NaBH4 system was investigated experimentally and theoretically (XRD, TPPA, DSC and ab initio calculations). All collected data and literature values were used for a thermodynamic assessment by the calphad method.


2010 ◽  
Vol 25 (3) ◽  
pp. 576-586 ◽  
Author(s):  
Feng Gao ◽  
Cuiping Wang ◽  
Xingjun Liu ◽  
Yoshikazu Takaku ◽  
Ikuo Ohnuma ◽  
...  

The phase equilibria at 200 °C, 250 °C, 300 °C, and 400 °C and the phase transformation of the Sn-Au-Bi system were investigated by using the electron probe micro-analyzer (EPMA) and differential scanning calorimeter (DSC), respectively. It is found that there is a new ternary intermetallic compound with a possible AuSn structure (called the ϕ phase in the present work), which has a limited solubility of Au in the Au-rich portion, and the ϕ phase decomposes peritectically at about 313 °C. Based on the experimental data reported in the previous papers and new experimental data determined by the present work, thermodynamic assessments of the Sn-Au-Bi system were carried out by the calculation of phase diagrams (CALPHAD) method. The thermodynamic parameters for describing the Gibbs free energy of each phase were optimized, and reasonable agreement between the calculated results and experimental data was obtained in the Sn-Au-Bi ternary system.


Author(s):  
Kent McDonald ◽  
David Mastronarde ◽  
Rubai Ding ◽  
Eileen O'Toole ◽  
J. Richard McIntosh

Mammalian spindles are generally large and may contain over a thousand microtubules (MTs). For this reason they are difficult to reconstruct in three dimensions and many researchers have chosen to study the smaller and simpler spindles of lower eukaryotes. Nevertheless, the mammalian spindle is used for many experimental studies and it would be useful to know its detailed structure.We have been using serial cross sections and computer reconstruction methods to analyze MT distributions in mitotic spindles of PtK cells, a mammalian tissue culture line. Images from EM negatives are digtized on a light box by a Dage MTI video camera containing a black and white Saticon tube. The signal is digitized by a Parallax 1280 graphics device in a MicroVax III computer. Microtubules are digitized at a magnification such that each is 10-12 pixels in diameter.


Author(s):  
Ina Grau ◽  
Jörg Doll

Abstract. Employing one correlational and two experimental studies, this paper examines the influence of attachment styles (secure, anxious, avoidant) on a person’s experience of equity in intimate relationships. While one experimental study employed a priming technique to stimulate the different attachment styles, the other involved vignettes describing fictitious characters with typical attachment styles. As the specific hypotheses about the single equity components have been developed on the basis of the attachment theory, the equity ratio itself and the four equity components (own outcome, own input, partner’s outcome, partner’s input) are analyzed as dependent variables. While partners with a secure attachment style tend to describe their relationship as equitable (i.e., they give and take extensively), partners who feel anxious about their relationship generally see themselves as being in an inequitable, disadvantaged position (i.e., they receive little from their partner). The hypothesis that avoidant partners would feel advantaged as they were less committed was only supported by the correlational study. Against expectations, the results of both experiments indicate that avoidant partners generally see themselves (or see avoidant vignettes) as being treated equitably, but that there is less emotional exchange than is the case with secure partners. Avoidant partners give and take less than secure ones.


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