Effect of Heat Treatment on Formation of Al-Al3Ni Hypereutectic Alloys

Ladislav Čelko; Lenka Klakurková; Karel Slámečka; Bedřich Smetana; Tomasz Płociński; Justyna Grzonka; Monika Žaludová; Malgorzata Lewandowska; Jiří Švejcar

doi:10.4028/www.scientific.net/KEM.592-593.513

Paper Titles

Advanced Microstructure Studies of an Austenitic Material Using EBSD in Elevated Temperature In Situ Tensile Testing in SEM
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A Comparative Study on Infrared Thermography during Ultrasonic Fatigue Testing of Cast Steel 42CrMo4 and Cast Aluminium Alloy AlSi7Mg
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Quantification of Liver Microcirculation Using X-Ray Microtomography of Vascular Corrosion Casts
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Experimental Study of Defect Induced Temperature Evolution in Polycrystalline Metals
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Effect of Heat Treatment on Formation of Al-Al₃Ni Hypereutectic Alloys
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Formation of Structurally Complex U-Phase in Al₇₂Pd_12.8Co_15.2 Alloy
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Using Acoustic Emission in Fracture Monitoring of Cementitious Composites
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Influence of the Surface Treatment of Tubes on the Heat Transfer in Low Pressure Atmosphere
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Experimental Studies of Excess Noise Sources in Concrete Based Materials as a Limiting Factor for Electromagnetic Emission Measurement
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HomeKey Engineering MaterialsKey Engineering Materials Vols. 592-593Effect of Heat Treatment on Formation of Al-Al3Ni...

Effect of Heat Treatment on Formation of Al-Al₃Ni Hypereutectic Alloys

Abstract:

The paper deals with the mechanism of eutectic formation in a nickel coated aluminium system after heat treatment. The initial coating was produced from a nickel powder by means of high velocity oxyfuel (HVOF) spraying onto an aluminium sheet substrate. Specimens for investigations were manufactured immediately after the spraying. The specimens were heat-treated using a differential thermal analysis (DTA) apparatus up to the temperature of 700 or 900 °C and then cooled down to room temperature in argon atmosphere with a constant heating and cooling rate of 5 °C / min, under which Al-Al₃Ni + Al₃Ni hypereutectic alloys were formed within the initial substrate. Two different alloy microstructures consisting of intermetallic layers and coarse eutectic or an ultrafine well-dispersed eutectic were formed. Formation processes and resulting microstructures were studied by means of DTA, metallography, scanning electron microscopy, focused ion beam, energy dispersive microanalysis and image analysis techniques.