Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/41747

Title

The effect of YSZ microstructure on Young's modulus

Author(s)

Michlik, Petr;  Racek, Ondrej;  Berndt, Christopher C.

Abstract

The mechanical behavior of nanostructured yttria stabilized zirconia (YSZ) thermal spray deposits was examined and compared to conventional zirconia coatings. Young's modulus was measured using indentation techniques. The anisotropy of the deposits was estimated by indenting the deposits in the perpendicular and parallel directions to the substrate. Statistical distribution of the mechanical properties was correlated with the microstructure. The effective Young's moduli of nanostructured and standard YSZ were also modeled by means of 2D extended FEM; whereby actual microstructures were assessed. The simulation was based on micrographs by employing a standard meshing program combined with an in-house developed XFEM package, which incorporates the crack structure into the model. The effect of nano-scale features on the effective Young's modulus were predicted and compared to experimental observations.

Publication type

Conference paper

Source

Thermal Spray 2004: Advances in technology and application: Proceedings of the International Thermal Spray Conference, Osaka, Japan, 10-12 May 2004, pp. 1110-1118

Publication year

2004

Keyword(s)

Aspect ratio;  Composite micromechanics;  Computer modeling;  Computer simulation;  Elastic moduli;  Finite element method;  Grain growth;  Magnetic resonance imaging;  Mathematical models;  Microstructure;  Morphology;  Nanoindentation;  Nanostructured materials;  Plasma spraying;  Property relationship;  Residual stresses;  Statistical distribution;  Thermal barrier coatings;  Thermal stress;  XFEM;  X-ray microtomography;  YSZ;  Yttria stabilized zirconia;  Yttrium compounds

Publisher

ASM International

ISBN

9780871708090, 0871708094

Publisher URL

http://books.google.com/books?id=ZuO5x1lyRa0C

Peer reviewed