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A method for the preparation of a composite material (CM) strengthened by alumina particles with a columnar structure on the basis of a VKNA-4U alloy is described. The method includes the preparation of heat-resistant nickel alloy powders with a particle size of ≤100 μm. The resulting matrix alloy powders are subjected to spraying and mechanical alloying with an Al2O3 reinforcing additive in an attritor...
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