Phase Selection in Mn–Si Alloys by Fast Solid‐State Reaction with Enhanced Skyrmion Stability

AbstractVapor-deposited Zr-Fe multilayered thin films with various wavelengths and of overall composition either 50% Fe or Fe-rich up to 57 % Fe were either irradiated with 300 keV Kr ions at temperatures from 25K to 623 K to fluences up to 2 × 1016 cm−2, or simply annealed at 773K in-situ in the Intermediate Voltage Electron Microscope at Argonne National Laboratory. Under irradiation, the final reaction product is the amorphous phase in all cases studied, but the dose to amorphization depends on the temperature and on the wavelength. In the purely thermal case (annealing at 773 K), the 50–50 composition produces the amorphous phase but for the Fe-rich multilayers the reaction products depend on the multilayer wavelength. For small wavelength, the amorphous phase is still formed, but at large wavelength the Zr-Fe crystalline intermetallic compounds appear. These results are discussed in terms of existing models of irradiation kinetics and phase selection during solid state reaction.

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The wustite-spinel interface

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100126226 ◽

1987 ◽

Vol 45 ◽

pp. 268-269

Author(s):

S.R. Summerfelt ◽

C.B. Carter

Keyword(s):

Solid State ◽

Solid State Reaction ◽

Strain Energy ◽

Matrix Material ◽

Lattice Misfit ◽

Solid State Reactions ◽

Oxygen Sublattice ◽

Large Particles ◽

Small Lattice ◽

Coherent Interfaces

The wustite-spinel interface can be viewed as a model interface because the wustite and spinel can share a common f.c.c. oxygen sublattice such that only the cations distribution changes on crossing the interface. In this study, the interface has been formed by a solid state reaction involving either external or internal oxidation. In systems with very small lattice misfit, very large particles (>lμm) with coherent interfaces have been observed. Previously, the wustite-spinel interface had been observed to facet on {111} planes for MgFe2C4 and along {100} planes for MgAl2C4 and MgCr2O4, the spinel then grows preferentially in the <001> direction. Reasons for these experimental observations have been discussed by Henriksen and Kingery by considering the strain energy. The point-defect chemistry of such solid state reactions has been examined by Schmalzried. Although MgO has been the principal matrix material examined, others such as NiO have also been studied.

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Observation of solid-state reaction between a thin yttria film and a (0001) α-alumina substrate

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100170955 ◽

1994 ◽

Vol 52 ◽

pp. 644-645

Author(s):

J. R. Heffelfinger ◽

C. B. Carter

Keyword(s):

Electron Microscopy ◽

Solid State ◽

Solid State Reaction ◽

Yttrium Aluminum Garnet ◽

Secondary Phase ◽

Ceramic Composites ◽

Alumina Substrate ◽

Transmission Electron ◽

Alumina Fibers ◽

Optical Applications

Transmission-electron microscopy (TEM), scanning-electron microscopy (SEM) and energy-dispersive x-ray spectroscopy (EDS) were used to investigate the solid-state reaction between a thin yttria film and a (0001) α-alumina substrate. Systems containing Y2O3 (yttria) and Al2O3 (alumina) are seen in many technologically relevant applications. For example, yttria is being explored as a coating material for alumina fibers for metal-ceramic composites. The coating serves as a diffusion barrier and protects the alumina fiber from reacting with the metal matrix. With sufficient time and temperature, yttria in contact with alumina will react to form one or a combination of phases shown by the phase diagram in Figure l. Of the reaction phases, yttrium aluminum garnet (YAG) is used as a material for lasers and other optical applications. In a different application, YAG is formed as a secondary phase in the sintering of AIN. Yttria is added to AIN as a sintering aid and acts as an oxygen getter by reacting with the alumina in AIN to form YAG.

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PREDICTION OF GLASS FORMATION BY SOLID STATE REACTION IN ALLOYS

Le Journal de Physique Colloques ◽

10.1051/jphyscol:1990413 ◽

1990 ◽

Vol 51 (C4) ◽

pp. C4-111-C4-117 ◽

Cited By ~ 2

Author(s):

L. J. GALLEGO ◽

J. A. SOMOZA ◽

H. M. FERNANDEZ ◽

J. A. ALONSO

Keyword(s):

Solid State ◽

Solid State Reaction ◽

Glass Formation

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Fabrication and Properties of Highly Pure BiFeO$lt;inf$gt;3$lt;/inf$gt; Using A Solid State Reaction-molten Salt Synthesis Method with Non-equilibrium Process

Journal of Inorganic Materials ◽

10.15541/jim20130603 ◽

2014 ◽

Vol 29 (11) ◽

pp. 1151 ◽

Cited By ~ 1

Author(s):

WU Xing ◽

LI Hai-Feng ◽

ZHOU Jin-Ling ◽

HUO Min-Feng ◽

CHENG Cheng ◽

...

Keyword(s):

Solid State ◽

Molten Salt ◽

Solid State Reaction ◽

Synthesis Method ◽

Molten Salt Synthesis ◽

Equilibrium Process ◽

Non Equilibrium

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X-ray Structure Refinement and Vibrational Spectroscopy of Ca8Gd2 (PO4)6 O2

JOURNAL OF ADVANCES IN CHEMISTRY ◽

10.24297/jac.v12i10.5520 ◽

2013 ◽

Vol 12 (10) ◽

pp. 719-726

Author(s):

R. Ayadi ◽

Mohamed Boujelbene ◽

T. Mhiri

Keyword(s):

Solid State ◽

General Formula ◽

Vibrational Spectroscopy ◽

Powder Diffraction ◽

Infrared Spectra ◽

Solid State Reaction ◽

Structure Refinement ◽

Unit Cell ◽

Cell Group ◽

X Ray

The present paper is interested in the study of compounds from the apatite family with the general formula Ca10 (PO4)6A2. It particularly brings to light the exploitation of the distinctive stereochemistries of two Ca positions in apatite. In fact, Gd-Bearing oxyapatiteCa8 Gd2 (PO4)6O2 has been synthesized by solid state reaction and characterized by X-ray powder diffraction. The site occupancies of substituents is0.3333 in Gd and 0.3333 for Ca in the Ca(1) position and 0. 5 for Gd in the Ca (2) position. Besides, the observed frequencies in the Raman and infrared spectra were explained and discussed on the basis of unit-cell group analyses.

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