Number of the records: 1
Durability of Amorphous and Crystalline BMAS Thermal Barrier Coatings Produced by Plasma Spraying
- 1.
SYSNO ASEP 0465123 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Durability of Amorphous and Crystalline BMAS Thermal Barrier Coatings Produced by Plasma Spraying Author(s) Čelko, L. (CZ)
Jech, D. (CZ)
Dvořák, K. (CZ)
Šulák, Ivo (UFM-A) ORCID
Klakurková, L. (CZ)
Obrtlík, Karel (UFM-A) RID, ORCIDNumber of authors 6 Source Title Materials Structure & Micromechanics of Fracture VIII. - Zürrich : Trans Tech Publications, 2017 / Šandera P. - ISSN 1662-9779 - ISBN 978-3-03835-626-4 Pages s. 383-386 Number of pages 4 s. Publication form Print - P Action MSMF8. International Conference on Materials Structure and Micromechanics of Fracture /8./ Event date 27.06.2016 - 29.06.2016 VEvent location Brno Country CZ - Czech Republic Event type WRD Language eng - English Country CH - Switzerland Keywords Burner-Rig Test ; Coating Failure ; Plasma Spraying ; Thermal Barrier Coating ; Powder Processing Subject RIV JK - Corrosion ; Surface Treatment of Materials OECD category Coating and films R&D Projects GA15-20991S GA ČR - Czech Science Foundation (CSF) Institutional support UFM-A - RVO:68081723 EID SCOPUS 85009740746 DOI 10.4028/www.scientific.net/SSP.258.383 Annotation Barium-Magnesium-Aluminium-Silicate (BMAS) powder was produced from a mixture of initial compounds BaO–MgO–Al2O3–SiO2 by means of solid state synthesis at the temperature of 1200 °C for 3 hours in a laboratory furnace. Synthetized powder was crushed into the fraction of 15-45 micrometer in a planetary ball mill. Thermal barrier coating system consisting of CoNiCrAlY (bond coat) and BMAS (top coat) was sprayed by atmospheric plasma spray technique onto the polycrystalline nickel-based superalloy substrate. During plasma spraying process, the BMAS underwent phase transformation and the amorphous phase within the top coat was produced. Therefore, after the spraying, several samples were crystallized via annealing in a furnace (4 hours at 1200 °C or 24 hours at 1000 °C) or by subjecting them to several passes of plasma jet. Both samples with an amorphous phase and fully-crystallized samples were subjected to the fire in a burner-rig test (propane-oxygen flame, single 3 + 3 minute cycle), where the top coat reached the temperature of 1150 °C. Top coat failure occurred during the cooling period due to the transformation of the amorphous phase into the crystalline one and/or due to the difference in thermal conductivity and expansion between the top coat and the bond coat. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2018
Number of the records: 1