High-temperature in-situ microscopy during stress-induced phase transformations in Co49Ni21Ga30shape memory alloy single crystals

2010 ◽  
Vol 101 (12) ◽  
pp. 1-11 ◽  
Author(s):  
Jayaram Dadda ◽  
Hans J-rgen Maier ◽  
Ibrahim Karaman ◽  
Yuri Chumlyakov
Keyword(s):  
High Temperature ◽  
Phase Transformations ◽  
Single Crystals

In situ high-temperature X-ray diffraction study of phase transformations in silver behenate

2005 ◽  
Vol 20 (02) ◽  
pp. 94-96 ◽  
Author(s):  
Thomas N. Blanton ◽  
Swavek Zdzieszynski ◽  
Michael Nicholas ◽  
Scott Misture
Keyword(s):  
High Temperature ◽  
Phase Transformations ◽  
Diffraction Study ◽  
X Ray Diffraction ◽  
X Ray

In situ characterizations of phase transformations kinetics in the Ti17 titanium alloy by electrical resistivity and high temperature synchrotron X-ray diffraction

2008 ◽  
Vol 476 (1-2) ◽  
pp. 60-68 ◽  
Author(s):  
Fabien Bruneseaux ◽  
Elisabeth Aeby-Gautier ◽  
Guillaume Geandier ◽  
Julien Da Costa Teixeira ◽  
Benoît Appolaire ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Titanium Alloy ◽  
High Temperature ◽  
Phase Transformations ◽  
X Ray Diffraction ◽  
X Ray

Crystal structures and high-temperature vibrational spectra for synthetic boron and aluminum doped hydrous coesite

2020 ◽  
Author(s):  
Yu Ye ◽  
Yunfan Miao ◽  
Joseph R. Smyth ◽  
Junfeng Zhang
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Single Crystals ◽  
Vibrational Spectra ◽  
Fourier Transformation ◽  
Ambient Pressure ◽  
Al Content ◽  
Al Substitution ◽  
Long Time

<p>Coesite, a high-pressure SiO2 polymorph, has drawn extensive interest from the mineralogical community for a long time. In this study, we synthesized hydrous coesite samples with different B and Al concentrations at 5 and 7.5 GPa (1273 K). The B concentration could be more than 400 B/10<sup>6</sup>Si with about 300 ppmw. H2O, while the Al content can be as much as 1200 ~ 1300 Al/10<sup>6</sup>Si with CH2O restrained to be less than 10 ppmw. Hence, B-substitution may prefer the mechanism of Si<sup>4+</sup> = B<sup>3+</sup> + H<sup>+</sup>, whereas Al-substitution could be dominated by 2Si<sup>4+</sup> = 2Al<sup>3+</sup> + O<sub>V</sub>. The doped B<sup>3+</sup> and Al<sup>3+</sup> cations may be concentrated in the Si1 and Si2 tetrahedra, respectively, and make noticeable changes in the Si-O4 and Si-O5 bond lengths. In-situ high-temperature Raman and Fourier Transformation Infrared (FTIR) spectra were collected at ambient pressure. The single crystals of coesite were observed to be stable up to 1500 K. The isobaric Grüneisen parameters (ϒ<sub>i<em>P</em></sub>) of the external modes (< 350 cm<sup>-1</sup>) are systematically smaller in the Al-doped samples, as compared with those for the Al-free ones, while most of the OH-stretching bands shift to higher frequencies in the high temperature range up to ~ 1100 K</p>

HVEM high-temperature in situ straining experiments on cubic zirconia single crystals

1997 ◽  
Vol 233 (1-2) ◽  
pp. 75-87 ◽  
Author(s):  
D. Baither ◽  
B. Baufeld ◽  
U. Messerschmidt ◽  
M. Bartsch
Keyword(s):  
High Temperature ◽  
Single Crystals ◽  
Cubic Zirconia
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