Atom distributions in mixed interstitial-substitutional solid solution: The case of Fe1−xNixNy austenite

1989 ◽  
Vol 45 (1-4) ◽  
pp. 359-364 ◽  
Author(s):  
J. Foct ◽  
P. Rochegude ◽  
C. Cordier-Robert
Keyword(s):  
Solid Solution ◽  
Substitutional Solid Solution

Effects of hydrogen on the microstructure and microchemistry of Ti3Al – Nb intermetallics at high temperatures and high pressures

1996 ◽  
Vol 11 (9) ◽  
pp. 2186-2197 ◽  
Author(s):  
H. Z. Xiao ◽  
I. M. Robertson ◽  
H. K. Birnbaum
Keyword(s):  
Solid Solution ◽  
High Temperatures ◽  
High Pressures ◽  
Chemical Potential ◽  
Substitutional Solid Solution ◽  
Hydrogen Gas ◽  
Solid Solution Phase ◽  
Face Centered Cubic ◽  
Fine Grained ◽  
Surrounding Matrix

The microstructural and microchemical changes produced in a Ti–25Al–10Nb–3V–1Mo alloy (at. %) by charging at high temperatures in high pressures of hydrogen gas have been studied using transmission electron microscopy (TEM) and x-ray methods. Hydrides incorporating all of the substitutional solutes that formed during charging have a face-centered cubic (fcc) structure and exhibit either a plate or fine-grained morphology. With increasing hydrogen content, the size of the hydrides decreases and their microchemistry changes as they approach the stable binary hydride, TiH2. Rejection of substitutional solute elements from the hydride produces changes in the microchemistry, and consequently in the crystal structure, of the surrounding matrix. In alloys containing 50 at. % H, this solute redistribution results in the formation of an orthohombic substitutional solid solution phase containing increased levels of Nb. The driving force of this redistribution of solutes is the reduction in the chemical potential of the system as the amount of the most stable hydride, TiH2, forms. The hydrides reverted to a solid solution on annealing in vacuum at 1073 K, and the original microchemistry of the alloy was restored. Reversion from the hydride structure to the original α2 ordered DO19 structure proceeds via a disordered HCP phase.

New anatase phase VTi2.6O7.2 ultrafine nanocrystals for high-performance rechargeable magnesium-based batteries

2018 ◽  
Vol 6 (28) ◽  
pp. 13901-13907 ◽  
Author(s):  
Jinzhi Sheng ◽  
Chen Peng ◽  
Siwen Yan ◽  
Guobin Zhang ◽  
Yalong Jiang ◽  
...  
Keyword(s):  
Solid Solution ◽  
High Performance ◽  
Anatase Phase ◽  
Substitutional Solid Solution

A new kind of VTi2.6O7.2 ultrafine nanocrystals is designed via constructing substitutional solid solution, and it exhibits improved Mg2+ and Li+ storage performances.

scholarly journals Synthesis and Electrochemical Performance of Graphene Wrapped SnxTi1−xO2Nanoparticles as an Anode Material for Li-Ion Batteries

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Xing Xin ◽  
Xufeng Zhou ◽  
Tao Shen ◽  
Zhaoping Liu
Keyword(s):  
Solid Solution ◽  
Electrochemical Performance ◽  
Anode Material ◽  
Solution Method ◽  
Substitutional Solid Solution ◽  
Li Ion Batteries ◽  
Li Ion ◽  
The Stability ◽  
Ti Content ◽  
Aqueous Solution Method

Ever-growing development of Li-ion battery has urged the exploitation of new materials as electrodes. Here,SnxTi1-xO2solid-solution nanomaterials were prepared by aqueous solution method. The morphology, structures, and electrochemical performance ofSnxTi1-xO2nanoparticles were systematically investigated. The results indicate that Ti atom can replace the Sn atom to enter the lattice of SnO2to form substitutional solid-solution compounds. The capacity of the solid solution decreases while the stability is improved with the increasing of the Ti content. Solid solution withxof 0.7 exhibits the optimal electrochemical performance. The Sn0.7Ti0.3O2was further modified by highly conductive graphene to enhance its relatively low electrical conductivity. The Sn0.7Ti0.3O2/graphene composite exhibits much improved rate performance, indicating that theSnxTi1-xO2solid solution can be used as a potential anode material for Li-ion batteries.

scholarly journals Crystal Chemistry of an Erythrite-Köttigite Solid Solution (Co3–xZnx) (AsO4)2·8H2O

Minerals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 548
Author(s):  
Justyna Ciesielczuk ◽  
Mateusz Dulski ◽  
Janusz Janeczek ◽  
Tomasz Krzykawski ◽  
Joachim Kusz ◽  
...  
Keyword(s):  
Solid Solution ◽  
Energy Dispersive Spectrometer ◽  
Substitutional Solid Solution ◽  
Relative Increase ◽  
Ore Deposit ◽  
X Ray ◽  
Sw Poland ◽  
Wide Compositional Range ◽  
Polymetallic Ore ◽  
Zn Ions

A wide compositional range, covering about 90% of an expected erythrite-köttigite substitutional solid solution with extreme compositions of (Co2.84Mg0.14Zn0.02) (AsO4)2·8H2O and (Zn2.74Co0.27) (AsO4)2·8H2O, was revealed in a suite of samples from a polymetallic ore deposit in Miedzianka, SW Poland. Members of the solid solution series were examined by means of Electron Probe Microanalysis (EPMA), Scanning Electron Microscopy (SEM)/Energy-Dispersive Spectrometer (EDS), X-ray single-crystal and powder diffraction, and Raman spectroscopy. Metal cations were randomly distributed between two special octahedral sites in the erythrite–köttigite structure. In response to Co ↔ Zn substitutions, small but significant changes in bond distances (particularly in [AsO4] tetrahedra), rotation, and distortion of co-ordination polyhedra were observed. Two sub-series of dominant cationic substitutions (Co-Mg-Ni and Co-Fe-Zn) were noted within the arsenate series of vivianite-group minerals linked by erythrite. The paragenetic sequence erythrite → Zn-rich erythrite → Co-rich köttigite → köttigite reflects the evolution of the solution’s pH towards increased acidity and a relative increase in the concentration of Zn ions following precipitation of erythrite.

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