METHOD OF PRODUCING ARTICLES FROM REFRACTORY MATERIALS Russian patent published in 2017 - IPC B22F3/23 C22C29/00 C04B35/58 

FIELD: technological processes.

SUBSTANCE: invention relates to production of articles from refractory materials. Method involves preparation of an exothermic mixture of powders, forming a charge billet, initiating a reaction of self-propagating high-temperature synthesis (SHS) and pressing the obtained product of the SHS. Exothermal mixture of powders is pressed into briquettes with the thickness of 10–30 mm and the relative density of 0.5–0.7. Charge billet is formed in the form of layers of the said briquettes from the exothermic mixture of powders separated by a layer of graphite of 0.2–1.0 mm thick. SHS reaction is initiated simultaneously in all layers of the charge billet at the pressure of 5–20 MPa, herewith in 1–20 sec after the initiation the obtained product of the SHS is pressed at the pressure of 100–450 MPa for 1–30 sec.

EFFECT: provided is obtaining articles with minimal residual porosity and high hardness.

1 cl, 1 dwg, 1 tbl, 2 ex