US 12,239,761 B2
Methods of silicon nitride laser cladding
Bryan J. McEntire, Salt Lake City, UT (US); Bhajanjit Singh Bal, Salt Lake City, UT (US); and Ryan M. Bock, Salt Lake City, UT (US)
Assigned to SINTX Technologies, Inc., Salt Lake City, UT (US)
Filed by SINTX TECHNOLOGIES, INC., Salt Lake City, UT (US)
Filed on Apr. 22, 2021, as Appl. No. 17/237,687.
Claims priority of provisional application 63/014,235, filed on Apr. 23, 2020.
Prior Publication US 2021/0330860 A1, Oct. 28, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C23C 24/00 (2006.01); A61L 27/30 (2006.01); A61L 27/54 (2006.01); B23K 26/0622 (2014.01); B23K 26/12 (2014.01); B23K 26/324 (2014.01); B23K 26/60 (2014.01); C22C 14/00 (2006.01); C23C 26/00 (2006.01)
CPC A61L 27/306 (2013.01) [A61L 27/54 (2013.01); B23K 26/0624 (2015.10); B23K 26/123 (2013.01); B23K 26/324 (2013.01); B23K 26/60 (2015.10); C22C 14/00 (2013.01); C23C 26/00 (2013.01); A61L 2300/412 (2013.01); A61L 2420/02 (2013.01); A61L 2430/02 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method of coating the surface of a biomedical implant comprising:
providing the biomedical implant;
roughening at least one surface of the biomedical implant;
laser cladding a coating of silicon nitride on the at least one roughened surface, the laser cladding comprising:
directing a laser beam to at least one roughened surface of the biomedical implant; and
pre-applying a powder mixture or simultaneously directing the powder mixture comprising silicon nitride to the at least one roughened surface of the biomedical implant; and
repeating the laser cladding step until the coating of silicon nitride has a thickness of at least 10 μm,
wherein roughening the at least one surface of the biomedical implant comprises using free abrasive machining to form random scratches.