Project description
High-entropy alloy coatings on magnesium substrates
High-entropy alloys are formed by mixing equiatomic proportions of five or more elements. They have physical and chemical properties, such as high tensile strength, and corrosion and oxidation resistance, that make them suitable for various applications. Funded by the Marie Skłodowska-Curie Actions programme, the HEAfilmonMg project plans to produce high-entropy alloy films on magnesium substrates by mechanical alloying, cold spraying and post-surface laser annealing techniques. The microstructural characterisation of the coatings will be conducted by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and porosity measurements. Furthermore, their chemical and mechanical properties will be determined by performing wear, oxidation and corrosion tests as well as hardness and elongation measurements.
Objective
Protective high entropy alloys (HEA) thin films/coatings on Mg substrate will be produced by mechanical alloying (MA), cold spraying (CS) and post-surface laser annealing (SLA) process. By using variable but controlled MA process and CS coating parameters (HEA feedstock powder & HEA MAed powder characteristics, CS technology geometric parameters, CS deposition parameters), variations in the micro-structure and property in HEA coatings will be attained. Microstructural characterization of HEA feedstock powders, MAed powders, CS coatings and CS+post-SLA coatings will be carried out by SEM, TEM, XRD, porosity measurements. Wear, oxidation, corrosion tests, hardness and elongation measurements will be made to determine chemical and mechanical properties of coatings. With this way relationships among deposition parameters-microstructure-properties will be determined in addition to the feasibility study of producing protective (wear and oxidation resistant) HEA coatings on Mg-parts by combined MA+CS & post- SLA process.
Fields of science
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Programme(s)
Funding Scheme
MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)Coordinator
D02 CX56 DUBLIN 2
Ireland