Effect of Heterogeneity on the Measurements of Mechanical Properties of Composite Coatings

DOI

10.2991/icimm-15.2015.71How to use a DOI?

Keywords

Nanoindentation; Porous; Composite coating; Indentation size effect

Abstract

The heterogeneity of porous features and different phases, especially porous features are important in the performance of ceramic coatings as thermal protection. In evaluation of mechanical properties of porous composite coatings by using nanoindentation, the effect of heterogeneity needs to be clarified. In this study, YSZ/Al2O3 composite coatings prepared by EPD and sintered subsequently at high temperatures are investigated. Load-displacement curves are pores and particle fractures sensitive, but independent of different phases. The measured mechanical properties are strongly dependent on the penetration depth chosen. In order to cover all the microstructural features in the YSZ/Al2O3 composite coatings, a penetration depth larger than 1000 nm was required to determine the global mechanical properties.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xiaojuan Lu
PY  - 2015/07
DA  - 2015/07
TI  - Effect of Heterogeneity on the Measurements of Mechanical Properties of Composite Coatings
BT  - Proceedings of the 5th International Conference on Information Engineering for Mechanics and Materials
PB  - Atlantis Press
SP  - 375
EP  - 379
SN  - 2352-5401
UR  - https://doi.org/10.2991/icimm-15.2015.71
DO  - 10.2991/icimm-15.2015.71
ID  - Lu2015/07
ER  -