Optimal experiment design for plasma thermal spray parameters at bending loads

Azadi, M ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1504/IJSURFSE.2012.046837
  3. Publisher: 2012
  4. Abstract:
  5. Ceramic thermal barrier coatings are applied on gas turbines and diesel engine components to protect metals from heat and this enhances the service lifetime by means of a reduction in working temperature. In the present paper, optimisation of plasma thermal spray parameters, including feed rate and nozzle distance from the specimen surface is performed by using the design of experiment method. Due to factorial approach, by considering two parameters with three variation levels, nine experiments of bending test are needed. The base material is cast aluminium alloy, A356.0-T7. The coating layers consist of a bond coat, Ni-Cr-Al-Y with a thickness of 150 μm and a top coat, ZrO2-8wt%Y2O3 with a thickness of 350 μm. The results of sensitivity analysis show that target functions including maximum bending force, stress and deflection of specimens are optimised at a feed rate of 30 gr/min and nozzle distance of 80 mm
  6. Keywords:
  7. Coating parameters ; Thermal barrier coating ; Base material ; Bending force ; Bending load ; Bond coats ; Ceramic thermal barrier coatings ; Coating layer ; Coating parameters ; Diesel engine components ; Feed-rates ; Finite element modelling ; Optimal experiment design ; Optimisations ; Plasma spray ; Service lifetime ; Specimen surfaces ; Target functions ; Thermal spray ; Top-coats ; Two parameter ; Working temperatures ; Bending tests ; Coatings ; Diesel engines ; Metal drawing ; Nozzles ; Optimization ; Thermal barrier coatings
  8. Source: International Journal of Surface Science and Engineering ; Volume 6, Issue 1-2 , 2012 , Pages 3-14 ; 1749785X (ISSN)
  9. URL: http://www.inderscience.com/offer.php?id=46837