This title appears in the Scientific Report :
2012
Please use the identifier:
http://dx.doi.org/10.1016/j.surfcoat.2011.11.003 in citations.
Decomposition of Ba(Mg1/3Ta2/3)O3 perovskite during atmospheric plasma spraying
Decomposition of Ba(Mg1/3Ta2/3)O3 perovskite during atmospheric plasma spraying
Perovskite Ba(Mg1/3Ta2/3)O-3, BMT has promising bulk properties (thermal conductivity similar to 2 W/m-K and coefficient of thermal expansion similar to 11 x 10(-6)/K at 1473 K) for thermal barrier coating (TBC) applications at high temperature. However, during atmospheric plasma spraying (APS), suc...
Saved in:
Personal Name(s): | Jarligo, M.O. |
---|---|
Mauer, G. / Sebold, D. / Mack, D.E. / Vaßen, R. / Stöver, D. | |
Contributing Institute: |
Werkstoffsynthese und Herstellungsverfahren; IEK-1 |
Published in: | Surface and coatings technology, 206 (2012) 8-9, S. 2515–2520 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2012
|
Physical Description: |
2515–2520 |
DOI: |
10.1016/j.surfcoat.2011.11.003 |
Document Type: |
Journal Article |
Research Program: |
Rationelle Energieumwandlung |
Series Title: |
Surface and Coatings Technology
206 |
Subject (ZB): | |
Publikationsportal JuSER |
Perovskite Ba(Mg1/3Ta2/3)O-3, BMT has promising bulk properties (thermal conductivity similar to 2 W/m-K and coefficient of thermal expansion similar to 11 x 10(-6)/K at 1473 K) for thermal barrier coating (TBC) applications at high temperature. However, during atmospheric plasma spraying (APS), such material was found to lose constituents due to the differences of vapor pressures resulting to non-stoichiometric composition of deposited coatings. To investigate the extent of phase decomposition at spray distance and varying electric arc current, different feedstock powders were plasma sprayed into water and collected for chemical, microstructural and phase analyses. When the electric arc current was decreased from 500 A to 300 A, the decomposition of the powders was reduced and the microstructure of the deposited coatings was improved. The thermal cycling lifetime of the deposited coatings at similar to 1250 degrees C surface temperature is also higher. (C) 2011 Elsevier B.V. All rights reserved. |