Published March 2010
| public
Journal Article
Transformation kinetics in plasma-sprayed barium- and strontium-doped aluminosilicate (BSAS)
- Creators
- Harder, B. J.
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Faber, K. T.
Abstract
The hexacelsian-to-celsian phase transformation in Ba_(1–x)Sr_xAl_2Si_2O_8 is of interest for environmental barrier coating applications. Plasma-sprayed microstructures were heat treated above 1100 °C and the kinetics of the hexacelsian-to-celsian transformation were quantified. Activation energies for bulk and crushed materials were determined to be ∼340 and ∼500 kJ mol^(−1), respectively. X-ray diffraction and electron backscattered diffraction were used to establish how plasma spraying barium- and strontium-doped aluminosilicate effectively reduces the energy required for its transformation.
Additional Information
© 2009 Acta Materialia Inc. Published by Elsevier Ltd. Received 3 November 2009; accepted 16 November 2009, Available online 18 November 2009. Supported by the Department of Energy, Office of Basic Energy Science, under contract No. DE-AC02-06CH11357. The authors acknowledge the contributions of Kang N. Lee for supplying the BSAS powders as well as Peter Voorhees, Christopher Weyant, and Joaquin Ramirez-Rico for discussion of the work. X-ray results were obtained at the Jerome B. Cohen X-ray facility and the microscopy images were collected at the NUANCE Center at Northwestern University, both of which are supported by the MRSEC program of the National Science Foundation (DMR-0520513).Additional details
- Eprint ID
- 47210
- DOI
- 10.1016/j.scriptamat.2009.11.019
- Resolver ID
- CaltechAUTHORS:20140715-091939378
- DE-AC02-06CH11357
- Department of Energy (DOE)
- DMR-0520513
- NSF
- Created
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2014-07-15Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field