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Formation of Hypereutectic Aluminium Alloys Using Sacrificial Coatings

By Martin Gregor


Master‘s thesis deals with the forming of hypereutectic aluminium alloys using sacrificial coatings. Literature research is focused on analysing the characteristics of aluminium and its alloys. Attention is also focused to the heat treatment of aluminium alloys and the influence of alloying elements on these alloys. Analysis of characteristics and increase the useful properties of Al - Ni alloys is another object of literary research. Attention is also focused to the analysis of thermal spraying methods by focusing on the principle of individual methods and the characteristics of the coatings made by these methods. The object of experimental part is to prepare the hypereutectic aluminium alloys using sacrificial nickel based coatings. This is an unconventional manufacturing process comprising coating the surface of the aluminium substrate with using HVOF technology and subsequent thermal exposure. Furthermore, the work deals with the metallographic evaluation of prepared samples with a particular focus on the influence of temperature and time of heat treatment on the final structure of the experimental samples

Topics: diffusion; Aluminium; obětovatelný povlak; thermal spray; sacrificial coating; difuze; eutectic; žárový nástřik; eutektikum; Hliník
Publisher: Vysoké učení technické v Brně. Fakulta strojního inženýrství
Year: 2014
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