US 11,745,259 B2
Methods for fabricating refractory complex concentrated alloys and composites containing such alloys, and bodies containing the same
Kenneth Henry Sandhage, Lafayette, IN (US)
Assigned to Purdue Research Foundation, West Lafayette, IN (US)
Filed by Purdue Research Foundation, West Lafayette, IN (US)
Filed on Mar. 22, 2021, as Appl. No. 17/208,424.
Claims priority of provisional application 62/994,434, filed on Mar. 25, 2020.
Prior Publication US 2021/0323058 A1, Oct. 21, 2021
Int. Cl. B22F 3/11 (2006.01); B22F 3/00 (2021.01); B22F 3/14 (2006.01); B22F 3/16 (2006.01); B22F 9/24 (2006.01); B22F 9/30 (2006.01); B22F 9/20 (2006.01)
CPC B22F 3/001 (2013.01) [B22F 3/1143 (2013.01); B22F 3/14 (2013.01); B22F 3/16 (2013.01); B22F 9/20 (2013.01); B22F 9/24 (2013.01); B22F 9/30 (2013.01); B22F 2003/145 (2013.01); B22F 2301/20 (2013.01)] 23 Claims
 
1. A method for producing a final body comprising a fine-grained refractory complex concentrated alloy, wherein the fine-grained refractory complex concentrated alloy has an average grain size of 20 micrometers or less, the method comprising:
providing a precursor comprising one or more precursor compounds containing elements of the fine-grained refractory complex concentrated alloy;
reducing the one or more precursor compounds in the precursor via reaction with a reducing agent to generate the fine-grained refractory complex concentrated alloy and a compound comprising a product of the reaction between the reducing agent and the one or more precursor compounds;
generating a solid material that contains at least the fine-grained refractory complex concentrated alloy;
forming with the solid material a porous intermediate body comprising a pore volume; and
consolidating the porous intermediate body to partially or completely remove the pore volume from the porous intermediate body to yield with the porous intermediate body a film that is on a surface of the final body and has a lower porosity than the porous intermediate body, wherein:
the precursor is a precursor film;
the solid material generated by reducing the one or more precursor compounds in the precursor film is a fine-grained film; and
the porous intermediate body is an intermediate film formed with the fine-grained film.