Study of Structural Features, Strength Properties, and Heat Resistance of a Dispersion-Hardened Composite Material Based on Nickel Intermetallide

摘要

A method for production of a composite material (CM) hardened by hafnium oxide particles with columnar structure based on VKNA-1B grade alloy is described. The method involves making heat-resistant nickel alloy powders with a particle size ≤ 100 μm. The obtained powders of the matrix VKNA-1B alloy are dispersed and alloyed mechanically in an attritor with the hardening additive HfO_2, and next the semifinished material is extruded with subsequent rolling. The production technique parameters of the CM based on the nickel aluminide-HfO_2 system are determined. The developed material is intended for advanced aircraft engines, first of all, parts of a combustor, doors of a controlled nozzle, and nozzle blades of gas turbine engines (GTEs). The physical and mechanical properties and the heat resistance of the composite material obtained are studied.