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Author Cojocaru, C. V. ♦ Wang, Y. ♦ Moreau, C. ♦ Lima, R. S. ♦ Mesquita Guimarães, J. ♦ Garcia, E. ♦ Miranzo, P. ♦ Osendi, M. I.
Source SpringerLink
Content type Text
Publisher Springer US
File Format PDF
Copyright Year ©2010
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations
Subject Keyword elastic modulus ♦ environmental barrier coatings ♦ heat-treatment ♦ mullite ♦ water vapor ♦ YSZ ♦ Analytical Chemistry ♦ Operating Procedures, Materials Treatment ♦ Characterization and Evaluation of Materials ♦ Materials Science ♦ Tribology, Corrosion and Coatings ♦ Surfaces and Interfaces, Thin Films
Abstract Yttria-stabilized zirconia (YSZ)-mullite multilayer architectures with compositional grading between the bond coat and YSZ top coat are envisioned as solutions to ease their coefficient of thermal expansion mismatch induced stress. In this work, two different types of mullite powder (spray-dried and freeze-granulated) and a mullite-YSZ 75/25 vol.% mixture spray-dried powder were employed. Using instrumented indentation with loads between 10 and 500 mN, the role of the powder characteristics on the mechanical behavior of air plasma-sprayed mullite bond coats deposited on SiC substrates was investigated. Hardness (H) and elastic modulus (E) were measured for the as-sprayed coatings and for coatings heat-treated at 1300 °C, in water vapor environment, for periods up to 500 h. Both H and E values of the coatings are found to be highly dependent on the size distribution of the starting powders. It is aimed the fabrication of an efficient and cost-effective EBC prototype based on YSZ compositionally graded mullite.
ISSN 10599630
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2010-11-13
Publisher Place Boston
e-ISSN 15441016
Journal Journal of Thermal Spray Technology
Volume Number 20
Issue Number 1-2
Page Count 8
Starting Page 100
Ending Page 107

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Source: SpringerLink