Anisotropic elastic properties of thermal spray coatings determined via resonant ultrasound spectroscopy

Journal Article · Fri Jan 01 04:00:00 EST 2010 · Acta Materialia

DOI:https://doi.org/10.1016/j.actamat.2010.06.003· OSTI ID:1010562

Tan, Yang ^[1]; Shyam, Amit ^[2]; Choi, Wanhuk Brian ^[1]; Lara-Curzio, Edgar ^[2]; Sampath, Sanjay ^[1]

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1. Stony Brook University (SUNY)
2. ORNL

The determination of elastic properties of plasma-sprayed ceramic and metallic coatings is difficult due to their complex microstructure, which involves a myriad array of pores, interfaces and other defects. Furthermore, the splat-based build-up of the coating results in transverse anisotropy in the elastic properties. In this paper, we report on the anisotropic elastic properties of these coatings determined by resonant ultrasound spectroscopy (RUS). This approach along with the analysis presented enables, for the first time, the determination of elastic properties as a function of direction and temperature for these complex systems with concomitant implications for design. The coating systems investigated included plasma-sprayed yttria-stabilized zirconia (YSZ) and nickel. An additional nickel coating deposited by high-velocity oxygen-fuel process was investigated and its elastic properties were compared to those of plasma-sprayed nickel. Average Young s moduli of the coatings were independently measured by using the instrumented indentation method. The elastic properties determined from the RUS and indentation methodologies allowed description of the microstructure elastic property relationships in the coatings.

• Research Organization: Oak Ridge National Laboratory (ORNL); High Temperature Materials Laboratory
• Sponsoring Organization: EE USDOE - Office of Energy Efficiency and Renewable Energy (EE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1010562
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 16 Vol. 58; ISSN 1359-6454
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
CERAMICS
COATINGS
DEFECTS
DESIGN
ELASTICITY
MICROSTRUCTURE
NICKEL
SPECTROSCOPY
SPRAY COATING
Young s modulus.
anisotropy
elastic properties
nickel
plasma-spraying
yttria stabilized zirconia