High-temperature carrier transport and thermoelectric properties of heavily La- or Nb-doped SrTiO3 single crystals

2005 ◽  
Vol 97 (3) ◽  
pp. 034106 ◽  
Author(s):  
Shingo Ohta ◽  
Takashi Nomura ◽  
Hiromichi Ohta ◽  
Kunihito Koumoto
2016 ◽  
Vol 233 ◽  
pp. 1-7 ◽  
Author(s):  
M. Anwar Hossain ◽  
Isao Tanaka ◽  
Takaho Tanaka ◽  
A. Ullah Khan ◽  
Takao Mori

Author(s):  
A. Garg ◽  
R. D. Noebe ◽  
R. Darolia

Small additions of Hf to NiAl produce a significant increase in the high-temperature strength of single crystals. Hf has a very limited solubility in NiAl and in the presence of Si, results in a high density of G-phase (Ni16Hf6Si7) cuboidal precipitates and some G-platelets in a NiAl matrix. These precipitates have a F.C.C structure and nucleate on {100}NiAl planes with almost perfect coherency and a cube-on-cube orientation-relationship (O.R.). However, G-phase is metastable and after prolonged aging at high temperature dissolves at the expense of a more stable Heusler (β'-Ni2AlHf) phase. In addition to these two phases, a third phase was shown to be present in a NiAl-0.3at. % Hf alloy, but was not previously identified (Fig. 4 of ref. 2 ). In this work, we report the morphology, crystal-structure, O.R., and stability of this unknown phase, which were determined using conventional and analytical transmission electron microscopy (TEM).Single crystals of NiAl containing 0.5at. % Hf were grown by a Bridgman technique. Chemical analysis indicated that these crystals also contained Si, which was not an intentional alloying addition but was picked up from the shell mold during directional solidification.


2021 ◽  
pp. 122155
Author(s):  
Thi Hoa Vu ◽  
Anh Tuan Pham ◽  
Van Quang Nguyen ◽  
JongHo Park ◽  
SuDong Park ◽  
...  

2020 ◽  
Author(s):  
E. E. Timofeeva ◽  
E. Yu. Panchenko ◽  
A. S. Eftifeeva ◽  
E. I. Yanushonite ◽  
M. V. Zherdeva ◽  
...  

2007 ◽  
Vol 27 (2-3) ◽  
pp. 813-817 ◽  
Author(s):  
K. Park ◽  
K.Y. Ko ◽  
W.-S. Seo ◽  
W.-S. Cho ◽  
J.-G. Kim ◽  
...  

2006 ◽  
Vol 89 (23) ◽  
pp. 232509 ◽  
Author(s):  
S. M. Rao ◽  
K. J. Wang ◽  
N. Y. Yen ◽  
Y. Y. Chen ◽  
C. B. Tsai ◽  
...  

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