This title appears in the Scientific Report :
2015
Stress Formation within the First Layer in Plasma Sprayed Coatings
Stress Formation within the First Layer in Plasma Sprayed Coatings
The residual stresses within plasma sprayed coatings are an important factor which can influence the lifetime of the coatings. The investigation of the evolving stresses during deposition and post-deposition cooling of YSZ coatings by measuring in-situ the specimen’s curvature with the so-called ICP...
Saved in:
Personal Name(s): | Mutter, Markus (Corresponding Author) |
---|---|
Mauer, Georg / Mücke, Robert / Vassen, Robert / Gibmeier, Jens / Back, Hyoung Chul | |
Contributing Institute: |
Werkstoffsynthese und Herstellungsverfahren; IEK-1 |
Published in: | 2015 |
Imprint: |
2015
|
Conference: | International Thermal Spray Conference and Exposition, Long Beach, CA (USA), 2015-05-11 - 2015-05-14 |
Document Type: |
Conference Presentation |
Research Program: |
Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) Methods and Concepts for Material Development |
Publikationsportal JuSER |
The residual stresses within plasma sprayed coatings are an important factor which can influence the lifetime of the coatings. The investigation of the evolving stresses during deposition and post-deposition cooling of YSZ coatings by measuring in-situ the specimen’s curvature with the so-called ICP sensor is a powerful tool to identify the different stress generation factors. Under certain spray conditions one can observe that the first torch pass leads to a significantly higher increase in specimen´s curvature than the following deposition passes, which indicates significantly higher stresses within the interface coating region. The reason for this steep curvature increase was investigated. It is suggested to be a combination of a stronger bonding of those splats being connected directly to the substrate and the relief of compressive stress within the substrate. The slope of this increase depends on the spray parameters as well as on the substrate conditions, which was investigated also. Introduction |