Coherent phase diagram of Au–Cu–Pd ternary system near and within the two-phase region of Au3Cu and AuCu I ordered phases

SUMMARYHeat-induced gelation of milk was studied using both rheological and structural techniques. The sample was a conventional skim milk, concentrated with an ultrafiltration membrane, which formed gels when heated at appropriate pH. We investigated some factors that are considered to affect the gelation, such as concentration, pH and rennet treatment. The gelation process was monitored with a high precision oscillatory shear rheometer and the structure of gels was evaluated with quasi-elastic laser light scattering. From these results the gelation and phase separation behaviour were determined. By combining the results for different concentrations a phase diagram was obtained, which indicated that skim milk had a two-phase region on the higher temperature side. The effects of pH and rennet treatment were also evaluated with the aid of this phase diagram. The results were discussed on the basis of concepts of the phase behaviour of polymers, which were successfully developed in polymer physics.

Download Full-text

Coherent Phase Diagram for Spinodal Decomposition in the Tetragonal Titanium Dioxide-Tin Oxide System

Journal of the American Ceramic Society ◽

10.1111/j.1151-2916.1991.tb07808.x ◽

1991 ◽

Vol 74 (8) ◽

pp. 1910-1915 ◽

Cited By ~ 18

Author(s):

Shinji Nambu ◽

Masaki Oiji

Keyword(s):

Phase Diagram ◽

Titanium Dioxide ◽

Spinodal Decomposition ◽

Tin Oxide ◽

Oxide System ◽

Coherent Phase ◽

Coherent Phase Diagram

Download Full-text

Phase Diagram and Precipitation Behaviour in Ni-Rich Region of Ni-Ta-Al Ternary System

Materials Science Forum ◽

10.4028/www.scientific.net/msf.561-565.2329 ◽

2007 ◽

Vol 561-565 ◽

pp. 2329-2332

Author(s):

Yuhki Tsukada ◽

Koichi Hasuike ◽

Yoshinori Murata ◽

Masahiko Morinaga

Keyword(s):

Phase Diagram ◽

Binary System ◽

Ternary System ◽

Phase Region ◽

Al Alloy ◽

High Melting ◽

Rich Region ◽

High Melting Temperature ◽

Precipitation Behaviour ◽

Phase Relationships

Tantalum (Ta) addition is one of the promising method for increasing the strength of Ni-based wrought alloys such as Inconel 718, because Ta is an element having a high melting temperature. For wrought alloys, it is necessary to make clear the phase relationships at 700~1000°C, but there is a few report on phase diagrams of Ni-Ta and Ni-Ta-Al systems at those temperatures. In this study, the phase diagram in Ni-rich region of Ni-Ta-Al system at 800°C, which is the important temperature for the practical use of the wrought alloys, was investigated. The equilibrium relations of each phase were examined by a conventional XRD, SEM/EDX and TEM observations. It was found that the γ-phase region expanded considerably towards Ta-rich compositional region in Ni-Ta-Al system at 800°C. Also, it was observed that the γ phase precipitated secondarily in the primary precipitated γ’ phase in Ni-10.5mol%Ta-5.5mol%Al alloy. Ni8Ta phase was not detected even in Ni-Ta binary system in this study, although this phase was reported previously.

Download Full-text

The coherent phase diagram of Cu-Ni-Zn

Acta Metallurgica ◽

10.1016/0001-6160(80)90003-6 ◽

1980 ◽

Vol 28 (10) ◽

pp. 1339-1347 ◽

Cited By ~ 28

Author(s):

A. de Rooy ◽

E.W. van Royen ◽

P.M. Bronsveld ◽

J.Th.M. de Hosson

Keyword(s):

Phase Diagram ◽

Coherent Phase ◽

Coherent Phase Diagram

Download Full-text

Phase-Separations of Coherent Precipitates of Ordered Phases in Elastically Constrained Alloys

MRS Proceedings ◽

10.1557/proc-980-0980-ii05-26 ◽

2006 ◽

Vol 980 ◽

Cited By ~ 1

Author(s):

Minoru Doi ◽

Hiroshi Kumagai ◽

Kanako Nakashima ◽

Takao Kozakai

Keyword(s):

Phase Separation ◽

Phase Region ◽

Point Of View ◽

Two Phase ◽

Phase Separations ◽

Transmission Electron ◽

Ordered Phases ◽

Chemical Free Energy ◽

Fe Alloys ◽

Means Of Transmission

AbstractPhase-separations of coherent precipitates of ordered phases were investigated by means of transmission electron microscopy (TEM) and the theoretical analysis from a thermodynamic point of view. When the two-phase microstructures of A1+L12 in elastically constrained Ni-Al-Ti and Ni-Si-Fe alloys are isothermally heated inside the two-phase region of A1+L12 , coherent L12 precipitate particles sometimes exhibit a phase-separation and A1 phase newly appears and grows in L12 particles. Phase-separations of the same type as the above are also observed in coherent two-phase microstructures of A2+D03 and A2+B2 in elastically constrained Fe-Si-V and Fe-Al-Ni alloys respectively: coherent D03 or B2 precipitates exhibit a phase-separation and A2 phase newly appears and grows in both precipitates. Such phase-separation is realized under the influence of chemical free energy and elastic energies.

Download Full-text

Phase evolution during crystallization of nanocomposite alloys with Co:Fe ratios in the two-phase region of the binary Fe–Co phase diagram

Journal of Applied Physics ◽

10.1063/1.2711283 ◽

2007 ◽

Vol 101 (9) ◽

pp. 09N108 ◽

Cited By ~ 15

Author(s):

P. R. Ohodnicki ◽

S. Y. Park ◽

H. K. McWilliams ◽

K. Ramos ◽

D. E. Laughlin ◽

...

Keyword(s):

Phase Diagram ◽

Phase Evolution ◽

Phase Region ◽

Two Phase

Download Full-text

Phase Equilibria and Lattice Parameters of Fe2Nb Laves Phase in Fe-Ni-Nb Ternary System at Elevated Temperatures

MRS Proceedings ◽

10.1557/proc-842-s5.37 ◽

2004 ◽

Vol 842 ◽

Cited By ~ 2

Author(s):

Masao Takeyama ◽

Nobuyuki Gomi ◽

Sumio Morita ◽

Takashi Matsuo

Keyword(s):

Ternary System ◽

Phase Equilibria ◽

Elevated Temperatures ◽

Phase Region ◽

Lattice Parameters ◽

Laves Phase ◽

Austenitic Steels ◽

Dominant Factor ◽

Two Phase ◽

Ni Content

ABSTRACTPhase equilibria in Fe-Ni-Nb ternary system at elevated temperatures have been examined, in order to identify the two-phase region of γ-Fe (austenite) and ε-Fe2Nb (C14). The ε single phase region exists in the range of 27.5 to 35.5 at.% Nb in the Fe-Nb binary system, and it extends toward the equi-niobium concentration direction up to 44 at.% Ni in the ternary system at 1473 K, indicating that more than half of the Fe atoms in Fe2Nb can be replaced with Ni. Thus, the γ+ε two-phase region exists extensively, and the solubility of Nb in γ phase increases from 1.5 to 6.0 at.% with increase in Ni content. The lattice parameters of a and c in the C14 Laves phase decrease with increasing Ni content. The change in a axis is in good agreement with calculation based on Vegard's law, whereas that of c axis is much larger than the calculated value. The result suggests that atomic size effect is responsible for a-axis change and the binding energy is dominant factor for the c-axis change. To extend these findings to development of new class of austenitic steels strengthened by Laves phase, an attempt has been made to control the c/a ratio by alloying. The addition of Cr is effective to make the c/a ratio close to the cubic symmetry value (1.633).

Download Full-text