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Journal articles on the topic 'Surface phase transition'

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Author: Grafiati

Published: 4 June 2021

Last updated: 2 February 2022

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1

Yurov, V. M., S. A. Guchenko, V. Ch Laurinas, and O. N. Zavatskaya. "Structural phase transition in surface layer of metals." Bulletin of the Karaganda University. "Physics" Series 93, no. 1 (March 29, 2019): 50–60. http://dx.doi.org/10.31489/2019ph1/50-60.

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2

TERAOKA, Y. "PHASE TRANSITIONS ON ALLOY SURFACES." Surface Review and Letters 03, no. 05n06 (October 1996): 1791–809. http://dx.doi.org/10.1142/s0218625x96002734.

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Various kinds of quasi-two-dimensional order-disorder phase transitions on binary alloy surfaces are discussed on the basis of the lattice gas model with appropriate approximations. The importance of surface segregation is pointed out in understanding phase transitions on alloy surfaces. Ordered structures localized on the surfaces are found above the bulk transition temperature, and a possibility of finding surface ordered structures with a different symmetry from the bulk ordered one is discussed, too. As for both ordering and segregating alloys, semi-infinite systems with surfaces are discussed above and below the bulk transition temperatures; in particular, the relation of the surface phase transitions to the bulk ones is focused on.

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3

Murao, Tsuyoshi. "Phase transition at surface." Bulletin of the Japan Institute of Metals 25, no. 11 (1986): 906–13. http://dx.doi.org/10.2320/materia1962.25.906.

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4

Wanless, Erica J., Tim W. Davey, and William A. Ducker. "Surface Aggregate Phase Transition." Langmuir 13, no. 16 (August 1997): 4223–28. http://dx.doi.org/10.1021/la970146k.

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5

Ruan, Ting, Binjun Wang, Chun Xu, and Yunqiang Jiang. "Shear Deformation Helps Phase Transition in Pure Iron Thin Films with “Inactive” Surfaces: A Molecular Dynamics Study." Crystals 10, no. 10 (September 23, 2020): 855. http://dx.doi.org/10.3390/cryst10100855.

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In a previous study, it was shown that the (111)fcc, (110)fcc and (111)bcc free surfaces do not assist the phase transitions as nucleation sites upon heating/cooling in iron (Fe) thin slabs. In the present work, the three surfaces are denoted as “inactive” free surfaces. The phase transitions in Fe thin films with these “inactive” free surfaces have been studied using a classical molecular dynamics simulation and the Meyer–Entel potential. Our results show that shear deformation helps to activate the free surface as nucleation sites. The transition mechanisms are different in dependence on the surface orientation. In film with the (111)fcc free surface, two body-centered cubic (bcc) phases with different crystalline orientations nucleate at the free surface. In film with the (110)fcc surface, the nucleation sites are the intersections between the surfaces and stacking faults. In film with the (111)bcc surface, both heterogeneous nucleation at the free surface and homogeneous nucleation in the bulk material are observed. In addition, the transition pathways are analyzed. In all cases studied, the unstrained system is stable and no phase transition takes place. This work may be helpful to understand the mechanism of phase transition in nanoscale systems under external deformation.

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6

Semchuk, O. Yu, O. O. Havryliuk, and A. A. Biliuk. "Laser-induced phase transition and ablation on the surface of solids (Review)." Surface 10(25) (December 30, 2018): 62–117. http://dx.doi.org/10.15407/surface.2018.10.062.

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7

Bastiaansen, Paul J. M., and Hubert J. F. Knops. "Is surface melting a surface phase transition?" Journal of Chemical Physics 104, no. 10 (March 8, 1996): 3822–31. http://dx.doi.org/10.1063/1.471035.

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8

Khan, Sandip, and Jayant K. Singh. "Surface Phase Transition of Associating Fluids on Functionalized Surfaces." Journal of Physical Chemistry C 115, no. 36 (August 22, 2011): 17861–69. http://dx.doi.org/10.1021/jp204025e.

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9

Saberi, Abbas Ali. "Geometrical phase transition on WO3 surface." Applied Physics Letters 97, no. 15 (October 11, 2010): 154102. http://dx.doi.org/10.1063/1.3502568.

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10

Yan, Hong, David Kessler, and L. Sander. "Roughening phase transition in surface growth." Physical Review Letters 64, no. 8 (February 1990): 926–29. http://dx.doi.org/10.1103/physrevlett.64.926.

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11

Chakrabarti, B., and C. Dasgupta. "Nonequilibrium phase transition in surface growth." Europhysics Letters (EPL) 61, no. 4 (February 2003): 547–53. http://dx.doi.org/10.1209/epl/i2003-00164-y.

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12

Koibuchi, H. "Phase transition of compartmentalized surface models." European Physical Journal B 57, no. 3 (June 2007): 321–30. http://dx.doi.org/10.1140/epjb/e2007-00170-y.

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13

Shobukhov, Andrey, and Hiroshi Koibuchi. "Parallel Tempering Monte Carlo Studies of Phase Transition of Free Boundary Planar Surfaces." Polymers 10, no. 12 (December 8, 2018): 1360. http://dx.doi.org/10.3390/polym10121360.

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We numerically study surface models defined on hexagonal disks with a free boundary. 2D surface models for planar surfaces have recently attracted interest due to the engineering applications of functional materials such as graphene and its composite with polymers. These 2D composite meta-materials are strongly influenced by external stimuli such as thermal fluctuations if they are sufficiently thin. For this reason, it is very interesting to study the shape stability/instability of thin 2D materials against thermal fluctuations. In this paper, we study three types of surface models including Landau-Ginzburg (LG) and Helfirch-Polyakov models defined on triangulated hexagonal disks using the parallel tempering Monte Carlo simulation technique. We find that the planar surfaces undergo a first-order transition between the smooth and crumpled phases in the LG model and continuous transitions in the other two models. The first-order transition is relatively weak compared to the transition on spherical surfaces already reported. The continuous nature of the transition is consistent with the reported results, although the transitions are stronger than that of the reported ones.

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14

CASTILLO ALVARADO, FRAY DE LANDA, MARGARITO CRUZ PINEDA, JERZY H. RUTKOWSKI, and LESZEK WOJTCZAK. "ROUGHNESS INFLUENCE ON SURFACE MELTING." Surface Review and Letters 08, no. 06 (December 2001): 599–608. http://dx.doi.org/10.1142/s0218625x01001531.

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The influence of surface roughness on surface melting phase transition is discussed within the molecular field theory. The roughness is characterized by the surface order parameter averaged over all the density fluctuations whose description corresponds to the discrete Gaussian solid-on-solid model. The potential governing the transition between the rough surface and the surface melting is considered in terms of the modified van der Waals equation of state. Its effective shape represents two intersecting parabolas with nonequal curvatures for the solid and liquid phases. The phase diagram shows the coexistence of two phases with rough and wet surfaces.

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15

Ivancic, Robert J. S., and Robert A. Riggleman. "Dynamic phase transitions in freestanding polymer thin films." Proceedings of the National Academy of Sciences 117, no. 41 (October 2, 2020): 25407–13. http://dx.doi.org/10.1073/pnas.2006703117.

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After more than two decades of study, many fundamental questions remain unanswered about the dynamics of glass-forming materials confined to thin films. Experiments and simulations indicate that free interfaces enhance dynamics over length scales larger than molecular sizes, and this effect strengthens at lower temperatures. The nature of the influence of interfaces, however, remains a point of significant debate. In this work, we explore the properties of the nonequilibrium phase transition in dynamics that occurs in trajectory space between high- and low-mobility basins in a set of model polymer freestanding films. In thick films, the film-averaged mobility transition is broader than the bulk mobility transition, while in thin films it is a variant of the bulk result shifted toward a higher bias. Plotting this transition’s local coexistence points against the distance from the films’ surface shows thick films have surface and film-center transitions, while thin films practically have a single transition throughout the film. These observations are reminiscent of thermodynamic capillary condensation of a vapor–liquid phase between parallel plates, suggesting they constitute a demonstration of such an effect in a trajectory phase transition in the dynamics of a structural glass former. Moreover, this transition bears similarities to several experiments exhibiting anomalous behavior in the glass transition upon reducing film thickness below a material-dependent onset, including the broadening of the glass transition and the homogenization of surface and bulk glass transition temperatures.

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16

Jiang, Yunqiang, Binjun Wang, Chun Xu, and Jianguo Zhang. "Atomistic Simulation of the Strain Driven Phase Transition in Pure Iron Thin Films Containing Twin Boundaries." Metals 10, no. 7 (July 15, 2020): 953. http://dx.doi.org/10.3390/met10070953.

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Using molecular dynamics (MD) simulation, the strain-induced phase transitions in pure body-centered-cubic (bcc) iron (Fe) thin films containing twin boundaries (TBs) with different TB fractions and orientations are studied. Two groups of bcc thin films with different TB-surface orientation relationships are designed. In film group 1, the (112) [ 11 1 ¯ ] TBs are perpendicular to the ( 11 1 ¯ ) free surfaces, while the (112) [ 11 1 ¯ ] TBs are parallel to the free surfaces in film group 2. We vary the TB numbers inserted into the films to study the effect of TB fraction on the phase transition. Biaxial strains are applied to the films to induce the bcc to close packed (cp) phase transition. The critical strain, at which the first phase transition takes place, decreases with the TB fraction increase in film group 1 with a perpendicular TB-surface orientation, while such a relationship is not observed in film group 2 with parallel TB-surface orientation. We focus on the free surface and TB as the nucleation positions of the new phase and the afterward growth. In addition, the dynamics of the phase transition is discussed. This work may help to understand the mechanism of phase transition in nanoscale or surface-dominant systems with pre-existing defects.

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17

BARBERO, G., T. BEICA, R. MOLDOVAN, and A. STEPANESCU. "SURFACE EFFECTS ON THE PHASE TRANSITIONS." International Journal of Modern Physics B 06, no. 14 (July 20, 1992): 2531–47. http://dx.doi.org/10.1142/s0217979292001274.

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The influence of the surface on the phase transitions is discussed. Classical models are reviewed and critically analyzed. Starting with a multilayer model, a new form of the surface energy is proposed. Our model predicts, contrary to previous models, a surface order parameter different from zero in a temperature range above the critical temperature characterizing the bulk phase transition. The application of the model to the evaluation of the surface tension gives results in agreement with experimental data.

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18

LIU HONG. "SURFACE PHASE TRANSITION OF NEMATICS INDUCED BY SURFACE INTERACTION." Acta Physica Sinica 49, no. 7 (2000): 1321. http://dx.doi.org/10.7498/aps.49.1321.

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19

Brun, C., and Z. Z. Wang. "‘‘Extraordinary’’ Surface Phase Transition at (100) Surface of NbSe3." Journal of Physics: Conference Series 61 (March 1, 2007): 147–54. http://dx.doi.org/10.1088/1742-6596/61/1/030.

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20

Calvo, H. L., and H. M. Pastawski. "Dynamical phase transition in vibrational surface modes." Brazilian Journal of Physics 36, no. 3b (September 2006): 963–66. http://dx.doi.org/10.1590/s0103-97332006000600044.

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21

Cao, Zhen, and Rudolph C. Hwa. "Quark-hadron phase transition with surface fluctuations." Physical Review C 54, no. 5 (November 1, 1996): 2600–2605. http://dx.doi.org/10.1103/physrevc.54.2600.

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22

Bruder, F., and R. Brenn. "Surface Phase Transition in a Polymer Blend." Europhysics Letters (EPL) 22, no. 9 (June 20, 1993): 707–12. http://dx.doi.org/10.1209/0295-5075/22/9/012.

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23

Figueiredo, W., and J. N. B. de Moraes. "Surface Phase Transition in Anisotropic Heisenberg Models." physica status solidi (a) 173, no. 1 (May 1999): 209–23. http://dx.doi.org/10.1002/(sici)1521-396x(199905)173:1<209::aid-pssa209>3.0.co;2-s.

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24

Enüstün, B. V., B. W. Gunnink, and T. Demirel. "Phase transition porosimetry and surface area determination." Journal of Colloid and Interface Science 134, no. 1 (January 1990): 264–74. http://dx.doi.org/10.1016/0021-9797(90)90274-r.

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25

Chevrier, J., Le Thanh Vinh, and A. Cruz. "Phase transition on the Si(111) surface: a first order phase transition under strain?" Surface Science 268, no. 1-3 (January 1992): L261—L266. http://dx.doi.org/10.1016/0039-6028(92)90932-v.

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26

Swiech, Waclaw, Thomas Schwarz-Selinger, and David G. Cahill. "Phase coexistence and morphology at the Si() surface phase transition." Surface Science 519, no. 1-2 (November 2002): L599—L603. http://dx.doi.org/10.1016/s0039-6028(02)02216-1.

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27

KOIBUCHI, HIROSHI, and MITSURU YAMADA. "PHASE TRANSITION OF A MODEL OF FLUID MEMBRANE." International Journal of Modern Physics C 11, no. 03 (May 2000): 441–50. http://dx.doi.org/10.1142/s0129183100000389.

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A model of fluid membrane, which is not self-avoiding, such as two-dimensional spherical random surface is studied by using Monte Carlo simulation. Spherical surfaces in R3 are discretized by piecewise linear triangle. Dynamical variables are the positions X of the vertices and the triangulation g. The action of the model is sum of area energy and bending energy times bending rigidity b. The bending energy and the specific heat are measured, and the critical exponents of the phase transitions are obtained by a finite-size scaling technique. We find that our model of fluid membrane undergoes a second order phase transition.

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28

Shiraishi, Kenji, Tomonori Ito, Yasuo Y. Suzuki, Hiroyuki Kageshima, Kiyoshi Kanisawa, and Hiroshi Yamaguchi. "Microscopic investigation of the surface phase transition on GaAs(001) surfaces." Surface Science 433-435 (August 1999): 382–86. http://dx.doi.org/10.1016/s0039-6028(99)00131-4.

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29

Hsu, Chia-Hung, and Mau-Tsu Tang. "Surface X-ray scattering system at the SRRC." Journal of Synchrotron Radiation 5, no. 3 (May 1, 1998): 896–98. http://dx.doi.org/10.1107/s090904959701385x.

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A UHV surface X-ray scattering system has been constructed at the SRRC, providing users with a state-of-the-art system for performing X-ray scattering studies of two-dimensional crystallography, in situ growth mechanisms as well as phase transitions of surfaces and interfaces. A study of the phase transition of the Si(001) reconstructed surface was conducted to commission both the scattering system and the SRRC X-ray beamline. The detailed design and performance of the SRRC surface X-ray scattering system together with the results of the Si(001) study are presented.

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30

Diep, Hung. "Phase Transition in Frustrated Magnetic Thin Film—Physics at Phase Boundaries." Entropy 21, no. 2 (February 13, 2019): 175. http://dx.doi.org/10.3390/e21020175.

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In this review, we outline some principal theoretical knowledge of the properties of frustrated spin systems and magnetic thin films. The two points we would like to emphasize: (i) the physics in low dimensions where exact solutions can be obtained; (ii) the physics at phase boundaries where interesting phenomena can occur due to competing interactions of the two phases around the boundary. This competition causes a frustration. We will concentrate our attention on magnetic thin films and phenomena occurring near the boundary of two phases of different symmetries. Two-dimensional (2D) systems are in fact the limiting case of thin films with a monolayer. Naturally, we will treat this case at the beginning. We begin by defining the frustration and giving examples of frustrated 2D Ising systems that we can exactly solve by transforming them into vertex models. We will show that these simple systems already contain most of the striking features of frustrated systems such as the high degeneracy of the ground state (GS), many phases in the GS phase diagram in the space of interaction parameters, the reentrance occurring near the boundaries of these phases, the disorder lines in the paramagnetic phase, and the partial disorder coexisting with the order at equilibrium. Thin films are then presented with different aspects: surface elementary excitations (surface spin waves), surface phase transition, and criticality. Several examples are shown and discussed. New results on skyrmions in thin films and superlattices are also displayed. By the examples presented in this review we show that the frustration when combined with the surface effect in low dimensions gives rise to striking phenomena observed in particular near the phase boundaries.

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31

Zhevnenko, S., A. Rodin, and A. Smirnov. "Surface phase transition in Cu–Fe solid solutions." Materials Letters 178 (September 2016): 1–4. http://dx.doi.org/10.1016/j.matlet.2016.04.166.

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32

Horstmann, Jan Gerrit, Hannes Böckmann, Bareld Wit, Felix Kurtz, Gero Storeck, and Claus Ropers. "Coherent control of a surface structural phase transition." Nature 583, no. 7815 (July 8, 2020): 232–36. http://dx.doi.org/10.1038/s41586-020-2440-4.

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33

ZHU, X.-M., I. K. ROBINSON, E. VLIEG, H. ZABEL, J. A. DURA, and C. P. FLYNN. "SURFACE PHASE TRANSITION AND KINETICS OF Cu3Au (111)." Le Journal de Physique Colloques 50, no. C7 (October 1989): C7–283—C7–287. http://dx.doi.org/10.1051/jphyscol:1989729.

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34

Kinoshita, Masahiro. "Water Structure and Phase Transition Near a Surface." Journal of Solution Chemistry 33, no. 6/7 (June 2004): 661–87. http://dx.doi.org/10.1023/b:josl.0000043632.91521.59.

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35

Earnshaw, J. C., and C. J. Hughes. "Surface-induced phase transition in normal alkane fluids." Physical Review A 46, no. 8 (October 1, 1992): R4494—R4496. http://dx.doi.org/10.1103/physreva.46.r4494.

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36

Wang, Ziying, Yi-Yang Sun, Ibrahim Abdelwahab, Liang Cao, Wei Yu, Huanxin Ju, Junfa Zhu, et al. "Surface-Limited Superconducting Phase Transition on 1T-TaS2." ACS Nano 12, no. 12 (November 7, 2018): 12619–28. http://dx.doi.org/10.1021/acsnano.8b07379.

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37

Plech, Anton, Roland Cerna, Vassilios Kotaidis, Florian Hudert, Albrecht Bartels, and Thomas Dekorsy. "A Surface Phase Transition of Supported Gold Nanoparticles." Nano Letters 7, no. 4 (April 2007): 1026–31. http://dx.doi.org/10.1021/nl070187t.

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38

Yagi, Katsumichi, and Yasumasa Tranishiro. "Studies of surface phase transition by electron microscopy." Phase Transitions 53, no. 2-4 (March 1995): 197–214. http://dx.doi.org/10.1080/01411599508200396.

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39

Balashova, E. V., V. V. Lemanov, and A. B. Sherman. "Phase transition in distorted surface layer of SrTiO3." Ferroelectrics 79, no. 1 (March 1, 1988): 157–60. http://dx.doi.org/10.1080/00150198808229420.

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40

Hannon, J. B., H. Hibino, N. C. Bartelt, B. S. Swartzentruber, T. Ogino, and G. L. Kellogg. "Dynamics of the silicon (111) surface phase transition." Nature 405, no. 6786 (June 2000): 552–54. http://dx.doi.org/10.1038/35014569.

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41

Shi, Long‐pei. "Ferromagnetic phase transition of the film and surface." Journal of Applied Physics 61, no. 8 (April 15, 1987): 4267–69. http://dx.doi.org/10.1063/1.338962.

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42

Han, W. K., S. C. Ying, and D. Sahu. "Critical dynamics near a surface structural phase transition." Physical Review B 41, no. 7 (March 1, 1990): 4403–9. http://dx.doi.org/10.1103/physrevb.41.4403.

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43

Koibuchi, H., N. Kusano, A. Nidaira, Z. Sasaki, and K. Suzuki. "Phase transition of surface models with intrinsic curvature." European Physical Journal B 42, no. 4 (December 2004): 561–66. http://dx.doi.org/10.1140/epjb/e2005-00015-9.

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44

Bordin, José Rafael, Leandro B. Krott, and Marcia C. Barbosa. "Surface Phase Transition in Anomalous Fluid in Nanoconfinement." Journal of Physical Chemistry C 118, no. 18 (April 28, 2014): 9497–506. http://dx.doi.org/10.1021/jp5010506.

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45

Luzhkov, A. A. "Elastic anomalies near a surface-induced phase transition." Surface Science 321, no. 3 (December 1994): L267—L270. http://dx.doi.org/10.1016/0039-6028(94)90186-4.

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46

DOSCH, H. "EVANESCENT X-RAYS PROBING SURFACE-DOMINATED PHASE TRANSITIONS." International Journal of Modern Physics B 06, no. 17 (September 10, 1992): 2773–808. http://dx.doi.org/10.1142/s0217979292002243.

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This article reviews the scattering of evanescent x-ray waves as they occur inside a solid in the regime of total external reflection. The theoretical and experimental details of glancing angle scattering and the use of synchrotron radiation are discussed. It is shown how strong surface disorder and surface roughness affect the Bragg scattering of these exponentially damped waves and how these scattering signals can be interpreted in a straightforward way within the distorted wave Born approximation (DWBA). The application of this novel surface technique to bulk phase transitions allows the observation of surface-dominated behaviour. This is illustrated via two examples:. 1. The discontinuous order-disorder transition in Cu 3 Au has been studied near the (001) and (111) surface by evanescent x-rays. It turns out that the order parameter close to the free surface of the alloy decays in a very pronounced way upon approaching the transition temperature. The quantitative analysis of the evanescent superlattice intensity is compatible with a wetting phenomenon. 2. The critical phenomena associated with the continuous order-disorder transition in Fe 3 Al become distinctly modified due to the presence of a free surface. By applying the evanescent wave method three new universal surface exponents β1, γ11 and η‖ could be determined. This allows for the first time a critical exprimental test of surface scaling relations which turn out to be in good agreement with the experimental findings. At the surface of binary alloys surface segregation phenomena occur which complicate the experimental observation of near-surface ordering and disordering phenomena as well as the theoretical models which have to account for these effects. Some implications of these surface effects is briefly presented.

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47

SPELLER, S., M. SCHLEBERGER, H. FRANKE, C. MÜLLER, and W. HEILAND. "SURFACE MELTING AND SURFACE ROUGHENING OF Pb(110) STUDIED BY LOW ENERGY ION SCATTERING." Modern Physics Letters B 08, no. 08n09 (April 20, 1994): 491–503. http://dx.doi.org/10.1142/s0217984994000522.

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The Pb(110) surface undergoes two phase transitions. At about 400 K a roughening transition is observed. At 580 K, i.e. about 20 K below the bulk melting point, surface melting is found, The surface develops point defects at rather low temperatures. The roughening is connected with the generation of steps or the reduction of terrace size. There is also evidence for anisotropy of the roughening transition. Low energy ion scattering experiments in the temperature range from 160 to 590 K are used to study the structural changes of the Pb(110) surface.

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48

Garbuz, V. V., V. A. Petrova, T. A. Silinskaya, T. F. Lobunets, O. I. Bykov, V. B. Muratov, T. M. Terentyeva, et al. "Specific surface area, crystallite size and thermokinetic of oxide formation γ → α-Al2O3 nano powders at 570 – 1470 K." Surface 12(27) (December 30, 2020): 146–52. http://dx.doi.org/10.15407/surface.2020.12.146.

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Powders where the γ≈α-Al2O3-nano phases are the priority precursors for catalysts for heterogeneous catalysis with the maximum content of surface 5-coordinated Al centers for Pt attachment. Hydrogenated nano powders (~8 nm) of γ-, γ '-, θ-, κ-Al2O3 soluble in hydrochloric acid were obtained from the processing of aluminum boride powders with an icosahedral structure. Samples, which underwent a step-by-step and single heating of 50-100K heat treatment for 2 hours at temperatures of 570-1470K, were received in quantity of 34. The specific surface area of SВET, m2g-1 was measured by the thermal nitrogen desorption express method of gas chromatography through the GC-1 device. X-ray (phase and coherent), fluorescence and phase chemical-analytical evaluation of the samples were performed. The thermokinetic characteristics of the processes are calculated using the exponential Arrhenius law. Dimensional characteristics of crystallites (10.4-48 nm); specific surface area of powders (213-8.6 m2g-1, SВET); thermokinetic parameters of α-Al2O3 crystallite growth process (V α-Al2O3 - 1.44 10-3 - 6.67 10-3 nm s-1; E α-Al2O3 = 38.7±2.1kJ mol-1; A0 = 0.16±0.0 s-1 along the temperature line 1220-1470K were determined and calculated. The process of dehydration of two OH-groups occurs in the region 570-720K Ea H2O ↑ = 30.5 ± 0.5 kJ mol-1 A0 = 1.33±0.3 s-1. The last group of OH at temperatures of 820 -1070К and a rate of 2.13 10-4 - 4.93 10-4 mol s-1 Ea H2O ↑ = 13.2 ± 0.8 kJ mol-1 A0 = 16.9 ± 0.9 s-1. The activation energy of the phase transition is Ea., γ → α-Al2O3 = 23.9 ± 1.0 kJ mol-1 A0 = 2.01 ± 0.72 s-1 (770-970K) and Ea., γ → α-Al2O3 = 83.5 ± 0.8 kJ mol-1 A0 =(2,05±0,95) 103 s-1 (1070-1170K). It agrees well with the known heat of conversion Eа, γ→α-Al2O3 = 85 kJ mol-1. The TK of γ≈α-Al2O3-nano phases is at 1170K.

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49

Jiao, Feng, Bo Zhao, Yong Zhao, and Tai Ping Li. "Study on the Phase Transition Characteristics in Ultrasonic High Efficiency Lapped Surface of Engineering Ceramics." Key Engineering Materials 416 (September 2009): 588–92. http://dx.doi.org/10.4028/www.scientific.net/kem.416.588.

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Surface phase structure has an important effect on the surface machining quality. The surface phase transition characteristics of ZrO2 and ZTA ceramics under different machining methods were tested by X-ray diffraction in the paper. Through the qualitative and quantitative phase analyses, the influences of several different precision machining methods on the phase transitions in the machined surface were studied. Research results show that there are more transitions from tetragonal phase ZrO2 to monoclinic phase ZrO2 in the high speed grinding surface; because of the high-frequency vibration of lapping tool in ultrasonic lapping, the stress condition in the grinding area can be improved and the stable tetragonal phase ZrO2 in the ultrasonic lapped surface is easy to get. The research conclusions have important significance on analyzing the surface residual stress and improving the surface machining quality of engineering ceramics.

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Andrews, Alison, Matthew Novenstern, and Lyle D. Roelofs. "Classification of a Novel Surface Phase Transition: The Knight-Move Phase." ChemPhysChem 11, no. 7 (May 3, 2010): 1476–81. http://dx.doi.org/10.1002/cphc.200900840.

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