Dan Anastasiu POP


20-50 APLICABILITATEA LEGII VEGARD ÎN DETERMINAREA PARAMETRULUI CRISTALOGRAFIC LA PULBERILE ALIATE MECANIC

VEGARD LAW APLICABILITY IN CRYSTAL PARAMETER
DETERMINATION FOR MECHANICALLY ALLOYED
POWDERS
The performed investigations prove that applying the Vegard Law for
Cr-Fe binary alloys result values of crystal parameter in good concordance with
experimental results. This makes Vegard Law a useful theoretical tool for
estimation of crystal properties of further alloys. The viability of this law could
not be proved for ternary systems. We mention that Al and Co were introduced
as ternary component after 16 hours of previous milling of Fe-Cr powder
composition. The adding of ternary element such Al or Co at the beginning of
milling experiment is an open path for further investigation of the applicability of
Vegard Law to the ternary systems.
Keywords: Fe-Cr alloys, lattice parameter, solid solutions
Cuvinte cheie: aliaje Fe-Cr, parametru reţelei cristaline, soluţii solide

50 APLICABILITATEA LEGII VEGARD ÎN


22-35 CARACTERIZAREA PRIN DIFRACȚIE CU RAZE X A UNOR PULBERI Cr- Fe-Al ȘI Cr-Fe-Co ALIATE MECANIC

Using milled Fe-Cr powder and introducing on these powders a small
amount of Co or Al powder, nanostructure alloys were obtained. Using X-ray
diffraction it was determined the crystallite size and the internal stress.
Williamson-Hall method was used for the crystallite size calculations. The
measurements were performed on a DRON 3 diffract meter and the data
acquisitions were performed using MATMEC IV software.
Cuvinte cheie: pulberi metalice, mori planetare, aliere mecanică
Keywords: metal powders, planetary mills, mechanical alloying

35 CARACTERIZAREA PRIN DIFRACȚIE CU RAZE X A