Study on formation mechanism of YSZ thermal barrier coatings with segmented structure

DOI

10.2991/icadme-15.2015.398How to use a DOI?

Keywords

Thermal barrier coatings (TBCs), Segmentation cracks, Formation mechanism, Tensile strength

Abstract

Compared with traditional structures, YSZ TBCs with high segmentation crack density sprayed have exhibited a promising potential in improving TBC thermal shock resistance because the segmentation cracks increase its strain tolerance. A study is presented of formation mechanism of segmented TBC. The segmentation cracks initiate and propagate during the deposition phase, as a result of stress relaxation when the coating is subjected to tensile stress. Also, the crack density reaches a constant value and is not influenced by further plastic deformation of the metal. High heat input to the substrate is the most favorable factor in developing segmentation cracks because particle temperature promote the joining of adjacent lamellae.

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  - Yi Wang
AU  - Shuo Sun
AU  - Min Liu
AU  - Hongli Suo
PY  - 2015/10
DA  - 2015/10
TI  - Study on formation mechanism of YSZ thermal barrier coatings with segmented structure
BT  - Proceedings of the 5th International Conference on Advanced Design and Manufacturing Engineering
PB  - Atlantis Press
SP  - 2127
EP  - 2133
SN  - 2352-5401
UR  - https://doi.org/10.2991/icadme-15.2015.398
DO  - 10.2991/icadme-15.2015.398
ID  - Wang2015/10
ER  -