US 12,220,837 B2
Method for producing article containing silicon carbide as main constituent, and raw material powder used in the method
Motoki Okinaka, Tokyo (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jun. 23, 2022, as Appl. No. 17/848,220.
Application 17/848,220 is a continuation of application No. PCT/JP2020/048063, filed on Dec. 23, 2020.
Claims priority of application No. 2019-233230 (JP), filed on Dec. 24, 2019; and application No. 2020-209577 (JP), filed on Dec. 17, 2020.
Prior Publication US 2022/0324135 A1, Oct. 13, 2022
Int. Cl. B28B 1/00 (2006.01); B33Y 10/00 (2015.01); B33Y 70/00 (2020.01); C04B 35/573 (2006.01); C04B 35/65 (2006.01); C04B 35/657 (2006.01)
CPC B28B 1/001 (2013.01) [B33Y 10/00 (2014.12); B33Y 70/00 (2014.12); C04B 35/573 (2013.01); C04B 35/65 (2013.01); C04B 35/657 (2013.01); C04B 2235/3826 (2013.01); C04B 2235/422 (2013.01); C04B 2235/428 (2013.01); C04B 2235/5436 (2013.01); C04B 2235/5445 (2013.01); C04B 2235/6026 (2013.01); C04B 2235/667 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for producing an article containing silicon carbide as a main constituent, the method comprising:
a plurality of sets of steps of
forming a layer of a raw material powder; and
irradiating the layer with laser light according to three-dimensional model data,
wherein the raw material powder is a mixture of silicon carbide powder, metallic silicon powder, and carbon powder, and
wherein the laser light used in the step of irradiation with laser light has a spatial laser power density of 11 J/mm3 to 50 J/mm3,
wherein the silicon carbide powder has a smaller average particle size than the metallic silicon powder, and the carbon powder has a smaller average particle size than the silicon carbide powder.