Effect of Composition on Grain Growth in Aluminum-magnesium Solid Solutions,

1948 ◽  
Author(s):  
Louis J. Demer ◽  
Paul A. Beck
Keyword(s):  
Grain Growth ◽  
Solid Solutions

scholarly journals Grain growth in Na0.5Bi0.5TiO3-based solid solutions

2019 ◽  
Vol 196 (1) ◽  
pp. 112-119
Author(s):  
L. Eglite ◽  
M. Antonova ◽  
E. Birks ◽  
M. Knite ◽  
M. Livinsh
Keyword(s):  
Grain Growth ◽  
Solid Solutions

Effect of annealing conditions on grain growth in the complex Ti1?xNbxC0.5N0.5 solid solutions

1982 ◽  
Vol 21 (5) ◽  
pp. 398-401 ◽  
Author(s):  
S. S. Ordan'yan ◽  
L. G. Maskhuliya ◽  
I. B. Panteleev
Keyword(s):  
Grain Growth ◽  
Solid Solutions ◽  
Annealing Conditions

Nucleation and Grain Growth Kinetics of Amorphous to Nanocrystalline Ceria Solid Solutions

2007 ◽  
Vol 558-559 ◽  
pp. 1339-1344 ◽  
Author(s):  
Jennifer L.M. Rupp ◽  
Barbara Scherrer ◽  
Ludwig J. Gauckler
Keyword(s):  
Thin Films ◽  
Grain Growth ◽  
Solid Solutions ◽  
Growth Kinetics ◽  
Scanning Calorimetry ◽  
Heating Chamber ◽  
Nanocrystalline Ceria ◽  
Average Grain Size ◽  
Grain Growth Kinetics ◽  
Kinetics Of

Nanocrystalline ceria-based thin films are of potential interest for use as gas-sensing layers and electrolytes in micro-Solid Oxide Fuel Cells (micro-SOFC) used for energy supply of next generation portables. In these devices the thin films have to be operated at intermediate to high temperatures (500 - 1000 °C) to be sufficiently high electrical conductive. However, only little is known on the nucleation and grain growth kinetics of pure ceria and its solid solutions when present as nanocrystalline thin film microstructures (average grain size < 100 nm). In this study amorphous, dense and crack-free CeO2 and Ce0.8Gd0.2O1.9-x thin films have been deposited by spray pyrolysis on sapphire. These films were crystallized to biphasic amorphous-nanocrystalline and fully nanocrystalline microstructures upon annealing with respect to time, temperature, heating rate and doping. Nucleation and grain growth kinetics were studied by differential scanning calorimetry, Xray diffraction analysis with in-situ heating chamber and scanning electron microscopy.

scholarly journals Grain Growth of Micron-Sized Grains in Undoped and Cobalt Oxide Doped Ceria Solid Solutions

2006 ◽  
Vol 114 (1335) ◽  
pp. 963-969 ◽  
Author(s):  
Eva JUD ◽  
Christoph B. HUWILER ◽  
Ludwig J. GAUCKLER
Keyword(s):  
Cobalt Oxide ◽  
Grain Growth ◽  
Solid Solutions ◽  
Doped Ceria ◽  
Ceria Solid Solutions

Piezoelectric Ceramics Based on Perovskite Solid Solutions with MPB - Mechanochemical Activation and Texturing for High Sensitivity and Power

2006 ◽  
Vol 45 ◽  
pp. 2432-2439
Author(s):  
Miguel Algueró
Keyword(s):  
Ternary System ◽  
Phase Boundary ◽  
Ceramic Material ◽  
Grain Growth ◽  
Solid Solutions ◽  
Mechanochemical Activation ◽  
High Sensitivity ◽  
Ceramic Materials ◽  
Templated Grain Growth ◽  
Pbtio3 Ceramic

Ceramics of morphotropic phase boundary (MPB) Pb(Mg1/3Nb2/3)O3-PbTiO3 have been processed from powders synthesized by mechanochemical activation of oxides. Their properties have been characterised and are compared with those of a MPB Pb(Mg1/3Nb2/3)O3-PbTiO3 ceramic material by the columbite route. Current experiments on texturing by templated grain growth from the powders synthesised by mechanochemical activation are briefly described. MPB Pb(Zn1/3Nb2/3)O3-PbTiO3 has also been mechanosynthesised, though perovskite is not stable under heating and ceramics cannot be processed. Pb(Fe1/2Nb1/2)O3 is being investigated as a means of stabilising the perovskite, and MPB ceramic materials of the ternary system have been successfully prepared.

Grain Refinement in Titanium-Erbium Alloys

1974 ◽  
Vol 32 ◽  
pp. 522-523
Author(s):  
B. B. Rath ◽  
J. E. O'Neal ◽  
R. J. Lederich
Keyword(s):  
Electron Microscopy ◽  
Size Distribution ◽  
Grain Refinement ◽  
Grain Growth ◽  
Volume Fraction ◽  
Pure Titanium ◽  
Systematic Investigation ◽  
Second Phase ◽  
Titanium Matrix ◽  
Average Size

Addition of small amounts of erbium has a profound effect on recrystallization and grain growth in titanium. Erbium, because of its negligible solubility in titanium, precipitates in the titanium matrix as a finely dispersed second phase. The presence of this phase, depending on its average size, distribution, and volume fraction in titanium, strongly inhibits the migration of grain boundaries during recrystallization and grain growth, and thus produces ultimate grains of sub-micrometer dimensions. A systematic investigation has been conducted to study the isothermal grain growth in electrolytically pure titanium and titanium-erbium alloys (Er concentration ranging from 0-0.3 at.%) over the temperature range of 450 to 850°C by electron microscopy.

Microstructural characterization of a rapidly solidified Al-Fe-V-Si alloy for elevated temperature applications

1988 ◽  
Vol 46 ◽  
pp. 550-551
Author(s):  
R. E. Franck ◽  
J. A. Hawk ◽  
G. J. Shiflet
Keyword(s):  
High Temperature ◽  
Elevated Temperature ◽  
Grain Growth ◽  
Volume Fraction ◽  
Microstructural Characterization ◽  
Second Phase ◽  
Microstructural Stability ◽  
Elevated Temperature Strength ◽  
Temperature Applications

Rapid solidification processing (RSP) is one method of producing high strength aluminum alloys for elevated temperature applications. Allied-Signal, Inc. has produced an Al-12.4 Fe-1.2 V-2.3 Si (composition in wt pct) alloy which possesses good microstructural stability up to 425°C. This alloy contains a high volume fraction (37 v/o) of fine nearly spherical, α-Al12(Fe, V)3Si dispersoids. The improved elevated temperature strength and stability of this alloy is due to the slower dispersoid coarsening rate of the silicide particles. Additionally, the high v/o of second phase particles should inhibit recrystallization and grain growth, and thus reduce any loss in strength due to long term, high temperature annealing.The focus of this research is to investigate microstructural changes induced by long term, high temperature static annealing heat-treatments. Annealing treatments for up to 1000 hours were carried out on this alloy at 500°C, 550°C and 600°C. Particle coarsening and/or recrystallization and grain growth would be accelerated in these temperature regimes.

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