Scientific blog
PhD report (March 2013) K. Stan 
Friday, 5 April, 2013, 12:55
Posted by Katarzyna Stan
Main studies carried out during the month:

- using new equipment – vibration micromill, melt spun ribbons of ternary alloy Al-Mn-Fe were pulverized into powder. Two trials were performed on alumina and tungsten carbide balls and containers
- melt spun ribbons with hafnium addition were annealed to precipitate hafnium from the solid solution which could lead to strengthening of whole sample.
- microstructure of cast alloys (containing five or six elements including molybdenum and zirconium or molybdenum and hafnium) was studied using SEM. All investigated alloys revealed similar microstructure including presence of phases like Al6(Mn,Fe), Al3(Mn,Fe) and Al3(Hf,Zr,Ti).
- using SEM melt spun ribbons pulverized with vibration mill were investigated after different times of milling. In obtained powders two fractions were observed: one with big particles around 200 µm and second one with particles below 20 µm. This indicates that longer time of milling is necessary as well as selection need to be performed to separate different fractions.


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