CPC B22F 10/73 (2021.01) [B22F 1/05 (2022.01); B22F 1/10 (2022.01); B22F 1/102 (2022.01); B22F 1/16 (2022.01); B22F 10/10 (2021.01); B22F 10/14 (2021.01); B29C 64/165 (2017.08); B33Y 10/00 (2014.12); B33Y 40/10 (2020.01); B33Y 70/10 (2020.01); C08F 2/22 (2013.01); C08F 212/08 (2013.01); C08F 220/14 (2013.01); C08K 3/11 (2018.01); C09D 11/037 (2013.01); C09D 11/322 (2013.01); C09D 11/38 (2013.01); B22F 10/28 (2021.01); B22F 2304/10 (2013.01); B22F 2998/10 (2013.01); B82Y 30/00 (2013.01)] | 19 Claims |
1. A method for making a build material composition for three-dimensional (3D) printing, comprising:
freezing a dispersion of flow additive nanoparticles in a liquid at a temperature of from 0° C. to −17° C. to form a frozen liquid containing the flow additive nanoparticles;
lyophilizing the frozen liquid containing the flow additive nanoparticles in a vacuum chamber starting at a temperature of about −40° C. to about −50° C., thereby forming flow additive agglomerates having a porous, fractal structure; and
mixing the flow additive agglomerates with a host metal;
wherein the flow additive nanoparticles have an average flow additive particle size ranging from about 1 to about 3 orders of magnitude smaller than an average host metal particle size of the host metal.
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