Coatings characterization of Ni-based alloy applied by HVOF
| Autor: | Carlos Agustin Poblano Salas, Gabriela Karina Pedraza Basulto, Patricia del Carmen Zambrano Robledo, Citlalli Gaona Tiburcio, Facundo Almeraya Calderon, Jose Angel Cabral Miramontes |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Bond strength Alloy Metallurgy Aerospace Engineering 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Indentation hardness Characterization (materials science) Coating 0103 physical sciences engineering 0210 nano-technology Porosity Thermal spraying |
| Zdroj: | Aircraft Engineering and Aerospace Technology. 90:336-343 |
| ISSN: | 1748-8842 |
| DOI: | 10.1108/aeat-09-2016-0146 |
| Popis: | Purpose The thermal spraying technique of High-Velocity Oxygen Fuel (HVOF) coating was used to deposit coatings of an alloy composed of Ni-based substrates on stainless steel AISI 304. The aim of this study was to determine the mechanical properties such as hardness and bond strength that these coatings have when the spray distance is varied, as well as the microstructure and phases formed during the thermal spray process. Design/methodology/approach The coatings were applied by HVOF and characterized by scanning electron microscopy, image analysis, X-ray diffraction, microhardness and bond strength to analyze the mechanical properties. Findings The microstructure of the coatings showed low porosity, oxide content and interface contamination in the substrate–coating interface, without the presence of unmolten particles. The microhardness values reached 600 HV for the three spray distances used and the bond strength values reached over 55 MPa. Practical implications The use of coatings on aircraft components is growing dramatically owing to the high costs of advanced materials and the growing lifecycle requirements for high-performance systems, which are taken into account because of the variety of coatings and complexity of environmental factors. Originality/value The originality of this study lies in the development of new coating materials for the manufacture and protection of various turbine components. The value is based on the development of materials and processes to be used to manufacture them. |
| Databáze: | OpenAIRE |
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