Determination of Young's modulus in chemically vapor-deposited SiC coatings

Journal Article · Sun Aug 01 00:00:00 EDT 1993 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1993.tb08318.x· OSTI ID:6254555

Watkins, T R; Green, D J; Ryba, E R ^[1]

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1. Pennsylvania State Univ., University Park, PA (United States). Dept. of Materials Science and Engineering

Ceramic coatings have been applied to numerous materials in order to increase hardness, thermal stability, and chemical resistance. Knowledge of the basic properties of coatings, such as elastic modulus and fracture toughness, is essential for their successful application. However, the very nature of a coating, e.g., its fragility, surface roughness, and dimensional variation, often makes accurate measurement of these properties difficult. Young's modulus of CVD and SiC coatings was measured in situ (on the substrate) using strain gage/flexure and dynamic resonance techniques. The average Young's moduli of CVD SiC from these techniques were 446 and 415 GPa, respectively, and were considered to be in good agreement. The determination of a representative coating thickness and cross section is critical in order to accurately estimate Young's modulus of coatings.

• OSTI ID: 6254555
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 76:8; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
CARBIDES
CARBON
CARBON COMPOUNDS
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
COATINGS
DEPOSITION
DIMENSIONS
ELEMENTAL MINERALS
ELEMENTS
FLEXURAL STRENGTH
GRAPHITE
MEASURING INSTRUMENTS
MECHANICAL PROPERTIES
MINERALS
NONMETALS
SILICON CARBIDES
SILICON COMPOUNDS
STRAIN GAGES
SUBSTRATES
SURFACE COATING
THICKNESS
YOUNG MODULUS