Combining X-Ray Diffraction Contrast Tomography and Mesoscale Grain Growth Simulations in Strontium Titanate: An Integrated Approach for the Investigation of Microstructure Evolution

2012 ◽  
pp. 127-137 ◽  
Author(s):  
Melanie Syha ◽  
Michael Bäurer ◽  
Wolfgang Rheinheimer ◽  
Wolfgang Ludwig ◽  
Erik M. Lauridsen ◽  
...  
Keyword(s):  
Grain Growth ◽  
Strontium Titanate ◽  
Microstructure Evolution ◽  
Integrated Approach ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffraction Contrast

Microstructure Evolution of a Fine Grain Al-50wt%Si Alloy Fabricated by High Energy Milling

2011 ◽  
Vol 479 ◽  
pp. 54-61 ◽  
Author(s):  
Fei Wang ◽  
Ya Ping Wang
Keyword(s):  
Grain Growth ◽  
Microstructure Evolution ◽  
Room Temperature ◽  
Milling Time ◽  
High Energy ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Laser Method ◽  
X Ray ◽  
Fine Grain

Microstructure evolution of high energy milled Al-50wt%Si alloy during heat treatment at different temperature was studied. Scanning electron microscope (SEM) and X-ray diffraction (XRD) results show that the size of the alloy powders decreased with increasing milling time. The observable coarsening of Si particles was not seen below 730°C in the high energy milled alloy, whereas, for the alloy prepared by mixed Al and Si powders, the grain growth occurred at 660°C. The activation energy for the grain growth of Si particles in the high energy milled alloy was determined as about 244 kJ/mol by the differential scanning calorimetry (DSC) data analysis. The size of Si particles in the hot pressed Al-50wt%Si alloy prepared by high energy milled powders was 5-30 m at 700°C, which was significantly reduced compared to that of the original Si powders. Thermal diffusivity of the hot pressed Al-50wt%Si alloy was 55 mm2/s at room temperature which was obtained by laser method.

scholarly journals Interface Orientation Distribution during Grain Growth in Bulk SrTiO3 Measured by Means of 3D X-Ray Diffraction Contrast Tomography

2012 ◽  
Vol 1421 ◽  
Author(s):  
Melanie Syha ◽  
Wolfgang Rheinheimer ◽  
Michael Bäurer ◽  
Erik M. Lauridsen ◽  
Wolfgang Ludwig ◽  
...  
Keyword(s):  
Grain Growth ◽  
Morphological Changes ◽  
Orientation Distribution ◽  
Ex Situ ◽  
X Ray Diffraction ◽  
Systematic Analysis ◽  
X Ray ◽  
Diffraction Contrast ◽  
Before And After ◽  
Interface Orientation

ABSTRACT3D x-ray diffraction contrast tomography (DCT) is a non-destructive technique for the determination of grain shape and crystallography in polycrystalline bulk materials. Using this technique, a strontium titanate specimen was repeatedly measured between annealing steps.. A systematic analysis of the growth history of selected grains before and after the ex-situ annealing step allows to extract the topological and morphological changes during grain growth. Furthermore, misorientation as well as interface orientation information of the microstructure reconstructions have been determined. The interface normal distribution clearly shows a preference for (100) oriented interfaces in the selected grains when annealed at 1600°C. This observation can be connected to existent interfacial energy estimations resulting from capillarity vector reconstructions.

scholarly journals 4D Study of Grain Growth in Armco Iron Using Laboratory X-ray Diffraction Contrast Tomography

2017 ◽  
Vol 219 ◽  
pp. 012039 ◽  
Author(s):  
J Sun ◽  
A Lyckegaard ◽  
Y B Zhang ◽  
S A Catherine ◽  
B R Patterson ◽  
...  
Keyword(s):  
Grain Growth ◽  
Armco Iron ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffraction Contrast

scholarly journals Three-dimensional grain structure of sintered bulk strontium titanate from X-ray diffraction contrast tomography

2012 ◽  
Vol 66 (1) ◽  
pp. 1-4 ◽  
Author(s):  
M. Syha ◽  
W. Rheinheimer ◽  
M. Bäurer ◽  
E.M. Lauridsen ◽  
W. Ludwig ◽  
...  
Keyword(s):  
Strontium Titanate ◽  
Three Dimensional ◽  
Grain Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffraction Contrast

Recrystallization and Grain Growth Related Texture and Microstructure Evolution in Two Rolled Magnesium Rare-Earth Alloys

2013 ◽  
Vol 765 ◽  
pp. 527-531 ◽  
Author(s):  
Indranil Basu ◽  
Talal Al Samman ◽  
Günter Gottstein
Keyword(s):  
Grain Growth ◽  
Microstructure Evolution ◽  
Electron Backscatter Diffraction ◽  
Deformation Texture ◽  
Rare Earth Alloys ◽  
X Ray Diffraction ◽  
X Ray ◽  
Texture Modification ◽  
Different Temperatures ◽  
Backscatter Diffraction

Two binary alloys, Mg-1Ce and Mg-1Gd (wt.%), were subjected to severe deformation via. single-pass rolling, followed by annealing treatments at different temperatures. Optical microscopy, X-ray diffraction and electron backscatter diffraction techniques were applied to characterize the respective texture and microstructure evolution. Correlations between the material composition and the deformation, recrystallization and grain growth events were established. Mg-1Ce displayed typical split basal textures post rolling with little modification during the transition from deformation to recrystallization, eventually producing a predominantly basal texture. On the other hand, Mg-1Gd produced significant texture modification, starting from a split basal deformation texture, which was eventually replaced by a RD-TD double split texture. The texture modification in the Mg-1Gd alloy was attributed to favorable grain growth during the recrystallization and grain growth events.

Preparation and Characterisation of TiO2 Thick Films Fabricated by Electrophoretic Deposition

2007 ◽  
Vol 561-565 ◽  
pp. 2163-2166 ◽  
Author(s):  
H.Z. Abdullah ◽  
Charles C. Sorrell
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Grain Growth ◽  
Electrophoretic Deposition ◽  
Defect Formation ◽  
Titanium Foil ◽  
X Ray Diffraction ◽  
Voltage Range ◽  
X Ray ◽  
Scanning Electron

Rutile nano-powders were suspended in a solution of acetylacetone and iodine. The suspensions were electrophoretically deposited on titanium foil at a voltage range of 5-30 V over times of 5-120 s. The dried tapes then were sintered at 800°C for 2 h in flowing argon. Both the green and fired tapes were examined by field emission scanning electron microscopy, optical microscopy, X-ray diffraction, and Raman microspectroscopy. The thickness of the films depended on the voltage and the time of deposition. The sintered microstructures depended significantly on the thickness of the film, which was a function the proximity to the Ti/TiO2 interface. The interface is critical to the microstructure because it acts as the source of defect formation, which enhances sintering, grain growth, and grain facetting.

X-ray diffraction study on surface modified complex strontium titanate microparticles

2003 ◽  
Vol 351 (1-2) ◽  
pp. 295-298 ◽  
Author(s):  
G.Y. Liu ◽  
Y.L. Zhang ◽  
X.M. Feng ◽  
J.K. Liang ◽  
G.H. Rao
Keyword(s):  
Diffraction Study ◽  
Strontium Titanate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Surface Modified

scholarly journals A study of deformation twinning in a titanium alloy by X-ray diffraction contrast tomography

2016 ◽  
Vol 105 ◽  
pp. 417-428 ◽  
Author(s):  
Laura Nervo ◽  
Andrew King ◽  
Arnas Fitzner ◽  
Wolfgang Ludwig ◽  
Michael Preuss
Keyword(s):  
Titanium Alloy ◽  
Deformation Twinning ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffraction Contrast
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