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| Azevedo, Nuno Monteiro |
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Prashar, Gaurav
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (7/7 displayed)
- 2024High-temperature erosion behavior of Al<sub>2</sub>O<sub>3</sub> reinforced Inconel625 high velocity oxy-fuel sprayed and direct-aged composite coatingscitations
- 2024Erosion performance of direct-aged Al2O3-reinforced plasma-sprayed composite coatings at high-temperature conditions
- 2023Artificial Intelligence and Machine learning in the Thermal Spray Industry: Practices, Implementation, and Challenges
- 2023A COMPREHENSIVE REVIEW ON COMBATING THE ELEVATED-TEMPERATURE SURFACE DEGRADATION BY <i>M</i>CrAl<i>X</i> COATINGScitations
- 2022ELECTROCHEMICAL CORROSION BEHAVIOR AND MICROSTRUCTURAL CHARACTERIZATION OF HVOF SPRAYED INCONEL718-Al<sub>2</sub>O<sub>3</sub> COMPOSITE COATINGScitations
- 2022PERFORMANCE OF THERMALLY SPRAYED HYDROXYAPATITE COATINGS FOR BIOMEDICAL IMPLANTS: A COMPREHENSIVE REVIEWcitations
- 2021Application of Thermal Spraying Techniques Used for the Surface Protection of Boiler Tubes in Power Plantscitations
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article
Erosion performance of direct-aged Al2O3-reinforced plasma-sprayed composite coatings at high-temperature conditions
Abstract
<jats:title>Abstract</jats:title><jats:p>• The present investigation evaluates the influence of furnace heat-treatment (HT) on the microstructure, microhardness, fracture toughness and erosion resistance of three plasma sprayed composite coatings: a Inconel625-30wt% micron-sized Al2O3 (In625-MHT) coating, a Inconel625-30wt% nano-sized Al2O3 (In625-NHT) coating and a Inconel625-15wt% micron-sized Al2O3 + 15wt% nano-sized Al2O3 (In625-BHT/bimodal) coating. High temperature solid particle erosion tests were conducted at 900ºC temperature and with at two different impingement angles (90 and 30) in simulated environment using standard erosion-test rig. Coatings were subjected to detailed mechanical and microstructural analysis in order to better understand their erosion mechanism and structure-property correlation. By healing pores and cracks, the furnace HT increases the coatings' erosion resistance in the order of In625-BHT, In625-NHT, and In625-MHTcoating. In addition, the mechanical properties of In625-BHT coating like porosity (1.0±0.09%), micro-hardness (1299±25Hv) and fracture toughness (5.9MPa√m) are significantly improved after HT. The presence of grooves and lips on the surfaces of uncoated substrates provides clear evidence that the erosion mechanism involves the combined processes of micro-ploughing and micro-cutting indicating ductile erosion mode. However unimodal and bimodal composite coatings demonstrated a brittle erosion mode.</jats:p>