METHOD FOR MANUFACTURING OF TERNARY CARBIDES: Fid-Bau Portal

METHOD FOR MANUFACTURING OF TERNARY CARBIDES

GARBIEC DARIUSZ / WISNIEWSKI JAKUB / PÓLROLNICZAK JOANNA / MARCZEWSKI MATEUSZ / KUBICKI GRZEGORZ

The subject of the application is a method for manufacturing of ternary carbides, with a general formula of M_nAX_n-1, where the symbol M means a transition metal, A means an element from group 13 or 14, and X means carbon, with the manufactured carbides finding use in particular in space industry, as well as aviation or automotive industry.A method for manufacturing of ternary carbides according to the invention is characterized by the synthesis process being conducted using powdered materials, component M, advantageously chrome Cr or titanium Ti, component A, advantageously Al, and component X, advantageously carbon C, which powder materials of components M:A:X are weighed in one of the possible mass rations: 2:1:1 or 3:1:2, whereas advantageously in the reaction in parallel overstoichiometry of component A is used, amounting to 5% to 30%, most advantageously 10% or 20% and/or substoichiometry of component X amounting from 5% to 30%, advantageously 10%, where first individual powder components are milled in a planetary mill in a shielding gas atmosphere, advantageously argon atmosphere, at a milling speed in the range of 200 to 500 RPM, advantageously 300 RPM, where the milling time is in the range of 2 to 30 hours, advantageously 12 hours, and afterwards the material is placed in graphite sintering tools, which are assembled in a manner which does not cause pressure on the sintered powder material, and thereafter the material is sintered with the use of spark plasma sintering device, in which the sintering process is performed at a heating rate in the range of 50°C/min to 600°C/min, advantageously 100°C/min to a temperature in the range of 900°C to 1400°C, most advantageously to a temperature in the range of 1050°C to 1100°C, whereas after obtaining the target temperature, the material keeps being heated over a time of 1 to 40 minutes, most advantageously in the over a time from 15 minutes to 30 minutes, and then is cooled inside the sintering tools to a temperature in the range of 20°C to 40°C, advantageously 25°C.