Oxygen interaction with hexagonal OsB2 at high temperature
Abstract
The stability of ReB2-type hexagonal OsB2 powder at high temperature with oxygen presence has been studied by thermogravimetric analysis, differential scanning calorimetry, SEM, EDS, and high-temperature scanning transmission electron microscopy and XRD. Results of the study revealed that OsB2 ceramics interact readily with oxygen present in reducing atmosphere, especially at high temperature and produces boric acid, which decomposes on the surface of the powder resulting in the formation of boron vacancies in the hexagonal OsB2 lattice as well as changes in the stoichiometry of the compound. It was also found that under low oxygen partial pressure, sintering of OsB2 powders occurred at a relatively low temperature (900°C). Finally, hexagonal OsB2 ceramic is prone to oxidation and it is very sensitive to oxygen partial pressures, especially at high temperatures.
- Authors:
-
- Univ. of Central Florida, Orlando, FL (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- AGH Univ. of Science and Technology in Krakow, Krakow (Poland)
- Univ. of Central Florida, Cocoa, FL (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1345002
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of the American Ceramic Society
- Additional Journal Information:
- Journal Volume: 99; Journal Issue: 12; Journal ID: ISSN 0002-7820
- Publisher:
- American Ceramic Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; osmium diboride; ceramics; STEM; thermal analysis
Citation Formats
Xie, Zhilin, Blair, Richard G., Orlovskaya, Nina, Cullen, David A., Kata, Dariusz, Rutkowski, Pawel, Lis, Jerzy, Qin, Nan, and T-Raissi, Ali. Oxygen interaction with hexagonal OsB2 at high temperature. United States: N. p., 2016.
Web. doi:10.1111/jace.14434.
Xie, Zhilin, Blair, Richard G., Orlovskaya, Nina, Cullen, David A., Kata, Dariusz, Rutkowski, Pawel, Lis, Jerzy, Qin, Nan, & T-Raissi, Ali. Oxygen interaction with hexagonal OsB2 at high temperature. United States. https://doi.org/10.1111/jace.14434
Xie, Zhilin, Blair, Richard G., Orlovskaya, Nina, Cullen, David A., Kata, Dariusz, Rutkowski, Pawel, Lis, Jerzy, Qin, Nan, and T-Raissi, Ali. Wed .
"Oxygen interaction with hexagonal OsB2 at high temperature". United States. https://doi.org/10.1111/jace.14434. https://www.osti.gov/servlets/purl/1345002.
@article{osti_1345002,
title = {Oxygen interaction with hexagonal OsB2 at high temperature},
author = {Xie, Zhilin and Blair, Richard G. and Orlovskaya, Nina and Cullen, David A. and Kata, Dariusz and Rutkowski, Pawel and Lis, Jerzy and Qin, Nan and T-Raissi, Ali},
abstractNote = {The stability of ReB2-type hexagonal OsB2 powder at high temperature with oxygen presence has been studied by thermogravimetric analysis, differential scanning calorimetry, SEM, EDS, and high-temperature scanning transmission electron microscopy and XRD. Results of the study revealed that OsB2 ceramics interact readily with oxygen present in reducing atmosphere, especially at high temperature and produces boric acid, which decomposes on the surface of the powder resulting in the formation of boron vacancies in the hexagonal OsB2 lattice as well as changes in the stoichiometry of the compound. It was also found that under low oxygen partial pressure, sintering of OsB2 powders occurred at a relatively low temperature (900°C). Finally, hexagonal OsB2 ceramic is prone to oxidation and it is very sensitive to oxygen partial pressures, especially at high temperatures.},
doi = {10.1111/jace.14434},
journal = {Journal of the American Ceramic Society},
number = 12,
volume = 99,
place = {United States},
year = {Wed Aug 10 00:00:00 EDT 2016},
month = {Wed Aug 10 00:00:00 EDT 2016}
}
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