Zero Lithium Miscibility Gap Enables High-Rate Equimolar Li(Mn,Fe)PO4 Solid Solution

Nano Letters ◽  
2021 ◽  
Author(s):  
Jinxing Yang ◽  
Changji Li ◽  
Tianjia Guang ◽  
Hui Zhang ◽  
Zhaojin Li ◽  
...  
Keyword(s):  
Solid Solution ◽  
High Rate ◽  
Miscibility Gap

Transition alpha structure in beta-isomorphous Nb-Hf alloys

1987 ◽  
Vol 45 ◽  
pp. 232-233
Author(s):  
R.W. Carpenter ◽  
Changhai Li ◽  
David J. Smith
Keyword(s):  
Solid Solution ◽  
Solution Phase ◽  
Miscibility Gap ◽  
Large Strains ◽  
Solid Solution Phase ◽  
Two Phase ◽  
Diffuse Intensity ◽  
Metastable Form ◽  
The Matrix ◽  
Equilibrium Morphology

Binary Nb-Hf alloys exhibit a wide bcc solid solution phase field at temperatures above the Hfα→ß transition (2023K) and a two phase bcc+hcp field at lower temperatures. The β solvus exhibits a small slope above about 1500K, suggesting the possible existence of a miscibility gap. An earlier investigation showed that two morphological forms of precipitate occur during the bcc→hcp transformation. The equilibrium morphology is rod-type with axes along <113> bcc. The crystallographic habit of the rod precipitate follows the Burgers relations: {110}||{0001}, <112> || <1010>. The earlier metastable form, transition α, occurs as thin discs with {100} habit. The {100} discs induce large strains in the matrix. Selected area diffraction examination of regions ∼2 microns in diameter containing many disc precipitates showed that, a diffuse intensity distribution whose symmetry resembled the distribution of equilibrium α Bragg spots was associated with the disc precipitate.

Epitaxial Solid-Solution Films of Immiscible MgO and CaO

1994 ◽  
Vol 341 ◽  
Author(s):  
E. S. Hellman ◽  
E. H. Hartford
Keyword(s):  
Solid Solution ◽  
Molecular Beam Epitaxy ◽  
Lattice Constant ◽  
Solid Solutions ◽  
Molecular Beam ◽  
Building Blocks ◽  
Layer Growth ◽  
Growth Mode ◽  
Miscibility Gap ◽  
Layer By Layer

AbstractMetastable solid-solutions in the MgO-CaO system grow readily on MgO at 300°C by molecular beam epitaxy. We observe RHEED oscillations indicating a layer-by-layer growth mode; in-plane orientation can be described by the Matthews theory of island rotations. Although some films start to unmix at 500°C, others have been observed to be stable up to 900°C. The Mgl-xCaxO solid solutions grow despite a larger miscibility gap in this system than in any system for which epitaxial solid solutions have been grown. We describe attempts to use these materials as adjustable-lattice constant epitaxial building blocks

Morphology of Sintered Cr-Mo Porous Materials

2015 ◽  
Vol 825-826 ◽  
pp. 838-843
Author(s):  
Moritz Boehm ◽  
Thomas Schmoelzer ◽  
Reinhard Simon ◽  
Christian Gierl-Mayer
Keyword(s):  
Electron Microscopy ◽  
Solid Solution ◽  
Scanning Electron Microscopy ◽  
Linear Expansion ◽  
Solid Phase ◽  
Phase Region ◽  
Miscibility Gap ◽  
Liquidus Boundary ◽  
Different Temperatures ◽  
Scanning Electron

Chromium and molybdenum exhibit continuous solubility in the solid phase region at temperatures of 908°C and above [1]. At lower temperatures, the system exhibits a miscibility gap. Furthermore a congruent minimum in the liquidus boundary exists at 1854°C. Chromium and molybdenum powders with different particle morphologies were mixed and porous green parts were produced by pressing. Sintering experiments were performed at different temperatures and for different chromium to molybdenum ratios. To investigate the evolution of the microstructure, sintering was interrupted at different temperatures and points in time. The microstructure and morphology of the sintered parts was investigated by scanning electron microscopy as well as light optical microscopy. It was found that during sintering, a Cr-Mo solid solution is formed. Depending on the molybdenum content, this induces either shrinking or swelling of the porous parts. Samples exhibited a linear expansion of up to 10% and final porosities of up to 65%.

Phase Equilibrium Diagrams of the Binary Systems LaMnO3-SrMnO3 and LaMnO3-CaMnO3

1999 ◽  
Vol 602 ◽  
Author(s):  
Peter Majewski ◽  
Lars Epple ◽  
Heike Schluckwerder ◽  
Fritz Aldinger
Keyword(s):  
Solid Solution ◽  
Phase Equilibrium ◽  
Binary Systems ◽  
Single Phase ◽  
Miscibility Gap ◽  
Structure Transformation

AbstractThe quasi binary systems LaMnO3 – SrMnO3 and LaMnO3 – CaMnO3 have been studied. Both systems show a miscibility gap below about 1400°C in air. This phenomenon causes the decomposition of single phase (La,Sr)MnO3−x and (La,Ca)MnO3−x solid solution with intermediate La:Sr or La:Ca ratios into La rich SrMnO3−x or CaMnO3−x and Sr or Ca rich LaMnO3−x at lower temperatures. At 1400°C a structure transformation of (La,Sr)MnO3 from orthorhombic to rombohedral has not been observed and the structure of La0.7Sr0.3MnO3 has been determined to be orthorhombic with a = 0.54927 ± 0.0009 nm, b = 0.54582 ± 0.0009 nm, and c = 0.76772 ± 0.0034 nm.

scholarly journals ZnSnSb2 anode: A solid solution behavior enabling high rate capability in Li-ion batteries

2019 ◽  
Vol 441 ◽  
pp. 227165 ◽  
Author(s):  
Gaël Coquil ◽  
Bernard Fraisse ◽  
Stéphane Biscaglia ◽  
David Aymé-Perrot ◽  
Moulay T. Sougrati ◽  
...  
Keyword(s):  
Solid Solution ◽  
Rate Capability ◽  
High Rate ◽  
Li Ion Batteries ◽  
High Rate Capability ◽  
Solution Behavior ◽  
Li Ion

HREM observation of stacking faults in Guinier-Preston zones for Al-Ag alloys

1990 ◽  
Vol 48 (4) ◽  
pp. 182-183
Author(s):  
P. Schwander ◽  
Ph.A. Dubey ◽  
G. Kostorz
Keyword(s):  
Solid Solution ◽  
Electron Beam ◽  
Single Crystals ◽  
Incubation Time ◽  
Homogeneous Nucleation ◽  
Optical Axis ◽  
Stacking Faults ◽  
Nucleation And Growth ◽  
Miscibility Gap ◽  
Spark Erosion

The decomposition of Al-rich Al-Ag-alloys quenched from the solid solution (α) and aged within the metastable miscibility gap, follows the sequence GP zones → γ' → γ (Ag2Al). Nearly spherical GP zones (Guinier-Preston zones) coherent with the fee matrix are formed by homogeneous nucleation and growth, whereas γ' plate-like precipitates with an hdp structure — lying on {111}-planes of the fee matrix — nucleate heterogeneously at dislocations after a certain incubation time. In the present work HREM was used to investigate the internal structure of the GP zones.Single crystals of Al-3 at.% Ag grown by strain-annealing were cut along (110) by spark erosion. The samples were homogenized for 2 h at 580°C prior to ageing for 43 h at 160°C. They were electrolytically thinned at −30°C in a methanol-HNO3 (2:1) solution. The TEM work was performed on a Philips CM 30 fitted with a Super Twin Lens and a double tilt holder. To bring the electron beam parallel to the optical axis the coma-free alignment was used. At 300 kV the instrumental point resolution was determined to be 1.9 Å using the Young’s fringes method.

Type II GaAsxSb1−x/InAs (x<0.35) heterojunction grown by MOVPE near a miscibility gap of the ternary solid solution

2008 ◽  
Vol 310 (23) ◽  
pp. 4846-4849 ◽  
Author(s):  
K.D. Moiseev ◽  
V.V. Romanov ◽  
T.I. Voronina ◽  
T.S. Lagunova ◽  
M.P. Mikhailova ◽  
...  
Keyword(s):  
Solid Solution ◽  
Miscibility Gap ◽  
Type Ii ◽  
Ternary Solid Solution
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