Phase equilibria and eutectic growth in ternary organic system (D)camphor–neopentylglycol–succinonitrile

Witusiewicz, V.T.; Hecht, U.; Sturz, Laszlo; Rex, S.

doi:10.1016/j.jcrysgro.2005.10.008

Cited by 24 publications

(25 citation statements)

References 15 publications

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“…A clear influence of crystallographic effects on the shape of well-developed colonies has also been reported [169][170][171]. Ternary-coupled eutectic growth (involving three distinct solid phases) was investigated both in metallic [172] and organic alloys [173][174][175]. A bewildering variety of microstructures was observed, which opens a completely new field of study.…”

Section: Multicomponent Alloysmentioning

confidence: 92%

Solidification microstructures and solid-state parallels: Recent developments, future directions

et al. 2009

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Rapid advances in atomistic and phase-field modeling techniques as well as new experiments have led to major progress in solidification science during the first years of this century. Here we review the most important findings in this technologically important area that impact our quantitative understanding of: (i) key anisotropic properties of the solid-liquid interface that govern solidification pattern evolution, including the solid-liquid interface free energy and the kinetic coefficient; (ii) dendritic solidification at small and large growth rates, with particular emphasis on orientation selection; (iii) regular and irregular eutectic and peritectic microstructures; (iv) effects of convection on microstructure formation; (v) solidification at a high volume fraction of solid and the related formation of pores and hot cracks; and (vi) solid-state transformations as far as they relate to solidification models and techniques. In light of this progress, critical issues that point to directions for future research in both solidification and solid-state transformations are identified.

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Section: Multicomponent Alloysmentioning

confidence: 92%

Solidification microstructures and solid-state parallels: Recent developments, future directions

et al. 2009

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“…For the binary eutectic growth, there have been sufficient investigations which lay the foundation of successful theoretical models [1] . In contrast, the solidification process of ternary eutectic alloys is very complicated [1][2][3][4][5][6][7][8][9][10][11][12] , which requires further profound investigations. Most of the recent research on ternary eutectic solidification pays more attention to the extension of the classic JH model, the evolution of solidification structure, and the properties of ternary alloys under equilibrium or quasi-equilibrium conditions.…”

mentioning

confidence: 99%

“…Witusiewicz et al [7][8][9] analyzed the phase equilibrium and growth mechanism of lamellar eutectic for ternary eutectic alloys. The Pb-Sb-Sn ternary alloys form a typical eutectic system, which exhibits three primary phase regions in its equilibrium phase diagram.…”

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confidence: 99%

Formation mechanism of primary phases and eutectic structures within undercooled Pb-Sb-Sn ternary alloys

Dai

Wei

2007

SCI CHINA SER G

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The solidification characteristics of three types of Pb-Sb-Sn ternary alloys with different primary phases were studied under substantial undercooling conditions. The experimental results show that primary (Pb) and SbSn phases grow in the dendritic mode, whereas primary (Sb) phase exhibits faceted growth in the form of polygonal blocks and long strips. (Pb) solid solution phase displays strong affinity with SbSn intermetallic compound so that they produce various morphologies of pseudobinary eutectics, but it can only grow in the divorced eutectic mode together with (Sb) phase. Although (Sb) solid solution phase and SbSn intermetallic compound may grow cooperatively within ternary eutectic microstructures, they seldom form pseudobinary eutectics independently. The (Pb)+(Sb)+SbSn ternary eutectic structure usually shows lamellar morphology, but appears as anomalous eutectic when its volume fraction becomes small. EDS analyses reveal that all of the three primary (Pb), (Sb) and SbSn phases exhibit conspicuous solute trapping effect during rapid solidification, which results in the remarkable extension of solute solubility.undercooling, dendritic growth, eutectic growth, ternary eutectic, solute trappingThe solidification of eutectic alloys, which involves the competitive nucleation and cooperative growth of two or more eutectic phases from one liquid phase, is an important research subject in the field of material physics. For the binary eutectic growth, there have been sufficient investigations which lay the foundation of successful theoretical models [1] . In contrast, the solidification process of ternary eutectic alloys is very complicated [1][2][3][4][5][6][7][8][9][10][11][12] , which requires further profound investigations. Most of the recent research on ternary eutectic solidification pays more attention to the extension of the classic JH model, the evolution of solidification structure, and the properties of ternary alloys under equilibrium or quasi-equilibrium conditions. Himemiya et al. [5] extended JH model to the coupled growth of three phases in ternary eutectic alloys. Souza et al. [6] studied the growth

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“…A new instability of the bulk sample from straight to wavy lamellar arrays, called zigzag instability, was found near the eutectic concentration, indicating new phenomena in eutectic solidification of bulk sample, which are different from that in thin sample. On the other hand, new ternary and quaternary organic eutectic alloys were found by Witusiewicz et al and the thermodynamic descriptions of these alloys were also developed by means of experimental and computational thermodynamics [80][81][82]. A bewildering variety of microstructures (Figure 7) was observed in some directional solidification experiments of these alloys, which opens a completely new field of study, but there is little recent theoretical work in this area.…”

Section: Eutectic Solidificationmentioning

confidence: 98%

“…The eutectic patterns of (a) the univariant ternary alloy (mol%) SCN-13.9DC-0.5NPG[81] and (b) the quaternary alloy 34SCN-44DC-19NPG-3AMPD[82].…”

mentioning

confidence: 99%

Solidification researches using transparent model materials — A review

Huang

Wang

2011

Sci. China Technol. Sci.

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A review is given in the paper for solidification researches with transparent model materials. The effective experimental method was first proposed by Jackson and Hunt in 1965. The transparent model materials for solidification researches are a kind of non-faceted crystals known as "plastic crystals" or "globular molecules", which have very low entropy of melting as that of metals. According to Jackson's theory proposed in 1958, entropy of phase transformation will determine whether the phase interface morphology is smooth or rough in atomic scale, which will lead to faceted or nonfacted phase interface in microscopic and macroscopic scales. Succinonitrile (SCN) and its alloys with water, ethanol, acetone, and NH 4 Cl-H 2 O solution are most commonly used as transparent model materials for solidification researches of dendritic growth, anisotropy of solid-liquid interfacial energy, crystal nucleation, crystal grain formation, directional solidification, eutectic and peritectic solidification, solidification defects formation such as bubble, hot tearing, etc. Among these researches, the most impressive work was the critical test of dendritic growth theories with high purity succinonitrile by Glicksman et al., which gave positive answer to the Ivantsov's analysis and negative answer to the ad hoc condition of the maximum velocity hypothesis. The future researches with transparent model materials could be suggested in three aspects: 1) accurate measurement of material properties and alloy phase diagrams in more plastic crystals, especially to find more transparent eutectic and peritectic alloys; 2) accurate measurement of the grain boundary groove shape to obtain precise data of the anisotropy parameters of the interfacial free energy in transparent model materials; 3) to get clear pictures of solidification processes with morphology details in a relatively large area, with continuous movement of liquid and particles, in order to give experimental support to numerical simulations aimming at accurate description of microstructure formation during solidification of multicomponent alloys under complex conditions of real casting and welding processes. transparent model materials, solidification, plastic crystal, dendritic growth Citation:Huang W D, Wang L L. Solidification researches using transparent model materials -A review.

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Phase equilibria and eutectic growth in ternary organic system (D)camphor–neopentylglycol–succinonitrile

Cited by 24 publications

References 15 publications

Solidification microstructures and solid-state parallels: Recent developments, future directions

Solidification microstructures and solid-state parallels: Recent developments, future directions

Formation mechanism of primary phases and eutectic structures within undercooled Pb-Sb-Sn ternary alloys

Solidification researches using transparent model materials — A review

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