| Numéro |
J. Phys. Colloques
Volume 48, Numéro C7, Décembre 1987
1st International Laser M2P Conference
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|---|---|---|
| Page(s) | C7-123 - C7-126 | |
| DOI | https://doi.org/10.1051/jphyscol:1987721 | |
1st International Laser M2P Conference
J. Phys. Colloques 48 (1987) C7-123-C7-126
DOI: 10.1051/jphyscol:1987721
Institut für Werkstoffkunde und Werkstofftechnik, Technische Universität Clausthal, D-3392 Clausthal-Zellerfeld, F.R.G.
J. Phys. Colloques 48 (1987) C7-123-C7-126
DOI: 10.1051/jphyscol:1987721
LASER MELTING OF PLASMA SPRAYED CERAMIC COATINGS
R. SIVAKUMAR and B.L. MORDIKEInstitut für Werkstoffkunde und Werkstofftechnik, Technische Universität Clausthal, D-3392 Clausthal-Zellerfeld, F.R.G.
Abstract
The porosity in the plasma sprayed ceramic coatings limits its life in many applications. A viable approach to overcome this problem is to remelt the coating using a laser beam. The melted layer cools non-uniformaly and the resulting tensile stresses generally lead to cracking. In this investigation, laser melting of ZrO2Al2O3 and TiO2 coatings was carried out. Laser operating parameters were optimized to obtain melted layers with as few cracks as possible. The conditions that lead to complete elimination of cracks have been identified and successfully demonstrated for Al2O3 and TiO2 coatings.