METHOD FOR PRODUCING 3D OBJECTS OF COMPLEX SHAPE FROM HIGH-ENTROPY ALLOY CERAMICS USING JET APPLICATION OF BINDER Russian patent published in 2023 - IPC B22F10/14 B22F3/105 C22C29/02 B33Y10/00 

FIELD: additive technologies.

SUBSTANCE: invention relates in particular to the production of 3D products of complex shape from high-temperature single-phase high-entropy ceramics. A three-dimensional computer model of a complex configuration is prepared, dimensions are set, taking into account possible shrinkage and warping, and the model is divided into layers for 3D printing. A spherical powder of high-entropy ceramics from at least one of the following elements: Ti, V, Zr, Nb, Hf, Ta, W, Mo with carbon or polycrystalline boron, with an average particle size of 10 mcm, is loaded into the installation for jet application of the binder. The workpiece is printed with the following parameters: layer thickness 100 microns, binder application saturation 78-95%, roller speed 4-8 mm/s, roller rotation speed 170-250 rpm, vibration frequency of the powder material feeder 1600-2200 rpm/min, the speed of movement of the powder material feeder when forming a layer is 35-55 mm/s, the temperature of infrared drying between applying layers is 50-60°C and drying time 20-30 s. The resulting blanks are loaded into a drying oven to completely cure the binder at 150-200°C and sintered at 2500-3000°C.

EFFECT: ensures uniform distribution of specified chemical elements and resistance to oxidation by high-temperature gas flow.

1 cl, 2 ex