Sol-gel derived thick ZrO{sub 2} coatings by liquid thermal spraying
- Universidad Simon Bolivar, Caracas (Venezuela)
- Fachbereich Keramik, Hoehr-Grenzhausen (Germany)
- Laboratoire Materiaux Ceramiques et Traitements de Surface, Limoges (France)
Thick monoclinic ZrO{sub 2} coatings (> 5 {mu}m) were obtained by spraying a sol-gel derived nanoscale suspension on stainless steel substrates. The ceramic deposition was carried out spraying the sol with a commercial flame-spray equipment. This new process is compared with a more traditional technique such as the wet spraying of the sol at room temperature followed by thermal treatments between 500 and 900{degrees}C. Both, wet and thermal sprayed coatings, were analyzed by scanning microscopy and X-ray diffraction. Coatings by wet-spray depositions showed a suitable densification behavior at low temperature however the high shrinkage of the film induced cracks. The thermal spraying process yield crack-free homogeneous layers with good adhesion and low porosity.
- OSTI ID:
- 62854
- Report Number(s):
- CONF-940315--
- Country of Publication:
- United States
- Language:
- English
Similar Records
Sol-gel derived ceramic electrolyte films on porous substrates
Sol-gel derived ceramic electrolyte films on porous substrates