Production of a porous blank used in powder metallurgy to produce components for combustion chambers for liquid-fueled rocket engines comprises using granules having defined maximum and minimum diameters

摘要

Production of a porous blank comprises using granules having a minimum diameter dmin and a maximum diameter dmax, where the ratio dmax/dmin is not more than 2.5. Preferred Features: After the formation of the blank, a surface layer of a thickness of 0.5dmax and 2dmax is electrochemically removed in a region of the recesses in the blank.