METHOD FOR MAKING THREE-DIMENSIONAL ARTICLES OF POWDER COMPOSITIONS Russian patent published in 2003 - IPC

FIELD: technology of laser synthesis of three-dimensional articles, machine parts by selective laser sintering. SUBSTANCE: method comprises steps of placing powder composition in machine tool for laser synthesis of three-dimensional articles and laser working of three-dimensional article formed layer by layer; extracting article from machine tool and removing out of machine tool excess quantity of powder composition not used for forming three-dimensional article; using as powder composition screened powder mixture on base of nickel-aluminum, nickel-titanium, aluminum and titanium for self- propagation high-temperature synthesis in accordance with stoichiometric content of eutectoid systems produced directly by action of laser beam; selecting mode of laser irradiation according to condition of realizing self-propagation high-temperature synthesis in diffusion burning mode; after removing from machine tool articles and excess powder composition, infiltrating articles with polyvinyl acetate or epoxide adhesive; drying articles. EFFECT: enlarged functional characteristics of created models, improved strength properties of sintered articles, possibility for receiving eutectoid systems during chemical burning reaction for enhancing adhesion between particles. 3 cl