PROCESS FOR PREPARING THE POWDER OF IRAL AND IRALINTERMETALLIC COMPOUNDS AND IRRADIATION TARGET FOR INDUSTRIAL GAMMAGRAPHY OBTAINED THEREWITH

摘要

The invention relates to a process for preparing sinterable powders of IrAl and IrAlintermetallic compounds meant to be used for obtaining irradiation targets for γ sources. The process claimed by the invention is a process of mechanical alloying of Ir and Al granules by crushing the same in a stainless steel ball planetary mill, under a protective argon atmosphere. The ball volume : material volume ratio is 20 : 1 at an enclosure filling degree of 35%, the milling time for forming the IrAl compound is 8 h and the milling time for forming the IrAlcompound is 28 h. The resulting irradiation target exhibits uniform dispersion of the activable element and reduced self-shielding factor.