Observations of grain boundary chemistry variations in a boron carbide processed with oxide additives

2018 ◽  
Vol 142 ◽  
pp. 106-110 ◽  
Author(s):  
Kristopher D. Behler ◽  
Christopher J. Marvel ◽  
Jerry C. LaSalvia ◽  
Scott D. Walck ◽  
Martin P. Harmer
Keyword(s):  
Grain Boundary ◽  
Boron Carbide ◽  
Boundary Chemistry

Effect of thermal annealing on grain boundary chemistry of polycrystalline TiBa2Ca2Cu3Oy films

1994 ◽  
Vol 52 ◽  
pp. 968-969
Author(s):  
Z. L. Wang ◽  
C. L. Briant ◽  
J. DeLuca ◽  
A. Goyal ◽  
D. M. Kroeger ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Weak Link ◽  
Zero Field ◽  
Stabilized Zirconia ◽  
Local Texture ◽  
Transmission Electron ◽  
Axis Alignment ◽  
Boundary Chemistry ◽  
Small Misorientation ◽  
Misorientation Angles

Recent studies have shown that spray-pyrolyzed films of the Tl-1223 compound (TlxBa2Ca2Cu3Oy, with 0.7 < × < 0.95) on polycrystalline yttrium stabilized zirconia substrates can be prepared which have critical current density Jc near 105 A/cm2 at 77 K, in zero field. The films are polycrystalline, have excellent c-axis alignment, and show little evidence of weak-link behavior. Transmission electron microscopy (TEM) studies have shown that most grain boundaries have small misorientation angles. It has been found that the films have a nigh degree of local texture indicative of colonies of similarly oriented grains. It is believed that inter-colony conduction is enhanced by a percolative network of small angle boundaries at colony interfaces. It has also been found that Jc is increased by a factor of 4 - 5 after the films were annealed at 600 °C in oxygen. This study is thus carried out to determine the effect on grain boundary chemistry of the heat treatment.

Dopant effect on high-temperature plastic flow behavior and grain boundary chemistry in oxide ceramics

2005 ◽  
Vol 96 (2) ◽  
pp. 108-116
Author(s):  
Hidehiro Yoshida ◽  
Yuichi Ikuhara ◽  
Taketo Sakuma
Keyword(s):  
High Temperature ◽  
Grain Boundary ◽  
Plastic Flow ◽  
Flow Behavior ◽  
Oxide Ceramics ◽  
Dopant Effect ◽  
Boundary Chemistry

Importance of grain boundary chemistry on the high-temperature plastic flow in oxide ceramics

1997 ◽  
Vol 234-236 ◽  
pp. 226-229 ◽  
Author(s):  
T. Sakuma ◽  
Y. Ikuhara ◽  
Y. Takigawa ◽  
P. Thavorniti
Keyword(s):  
High Temperature ◽  
Grain Boundary ◽  
Plastic Flow ◽  
Oxide Ceramics ◽  
Boundary Chemistry

scholarly journals Grain Boundary Sliding and Amorphization are Responsible for the Reverse Hall-Petch Relation in Superhard Nanocrystalline Boron Carbide

2018 ◽  
Vol 121 (14) ◽  
Author(s):  
Dezhou Guo ◽  
Shuangxi Song ◽  
Ruichun Luo ◽  
William A. Goddard ◽  
Mingwei Chen ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Boron Carbide ◽  
Grain Boundary Sliding ◽  
Petch Relation ◽  
Boundary Sliding

High-temperature strength of boron carbide with Pt grain-boundary framework in situ synthesized during spark plasma sintering

2020 ◽  
Vol 46 (7) ◽  
pp. 9136-9144 ◽  
Author(s):  
O. Vasylkiv ◽  
D. Demirskyi ◽  
H. Borodianska ◽  
A. Kuncser ◽  
P. Badica
Keyword(s):  
High Temperature ◽  
Grain Boundary ◽  
Boron Carbide ◽  
Spark Plasma Sintering ◽  
High Temperature Strength ◽  
Plasma Sintering ◽  
Spark Plasma

scholarly journals Tailoring the Grain Boundary Chemistry of Polymeric Carbon Nitride for Enhanced Solar Hydrogen Production and CO2 Reduction

2019 ◽  
Vol 131 (11) ◽  
pp. 3471-3475 ◽  
Author(s):  
Guigang Zhang ◽  
Guosheng Li ◽  
Tobias Heil ◽  
Spiros Zafeiratos ◽  
Feili Lai ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Grain Boundary ◽  
Carbon Nitride ◽  
Co2 Reduction ◽  
Solar Hydrogen ◽  
Solar Hydrogen Production ◽  
Boundary Chemistry ◽  
Polymeric Carbon

scholarly journals Criterion for High Temperature Failure and Grain Boundary Chemistry in Superplastic TZP

2004 ◽  
Vol 45 (7) ◽  
pp. 2106-2111 ◽  
Author(s):  
Hidehiro Yoshida ◽  
Hitoshi Nagayama ◽  
Akihide Kuwabara ◽  
Taketo Sakuma
Keyword(s):  
High Temperature ◽  
Grain Boundary ◽  
Boundary Chemistry

scholarly journals Criterion for High Temperature Failure and Grain Boundary Chemistry in Superplastic TZP

2005 ◽  
Vol 69 (9) ◽  
pp. 835-840
Author(s):  
Hidehiro Yoshida ◽  
Hitoshi Nagayama ◽  
Akihide Kuwabara ◽  
Taketo Sakuma
Keyword(s):  
High Temperature ◽  
Grain Boundary ◽  
Boundary Chemistry
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