Build material composition
AssigneeHewlett-Packard Development Company, L.P.
InventorsVladek Kasperchik, Mohammed S. Shaarawi, James McKinnell, Tienteh Chen
Life of this patent
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Abstract
An example of a method for making a build material composition for three-dimensional (3D) printing includes freezing a dispersion of flow additive nanoparticles in a liquid to form a frozen liquid containing the flow additive nanoparticles. The frozen liquid containing the flow additive nanoparticles is lyophilized to form flow additive agglomerates having a porous, fractal structure. The flow additive agglomerates are mixed with a host metal. 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.
Claims19
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.
A method for making a build material composition for three-dimensional (3D) printing, comprising:
- freezing a dispersion of flow additive nanoparticles in a liquid to form a frozen liquid containing the flow additive nanoparticles, the flow additive nanoparticles being selected from the group consisting of i) a metal containing compound selected from the group consisting of vanadium oxide, a chromium oxide, an iron oxide, a cobalt oxide, a nickel oxide, a copper oxide, and a mixed transition metal oxide including any combination of these oxides, ii) a non-crosslinked organic material that is pyrolyzable at a pyrolysis temperature that is less than the sintering temperature of the host metal, and iii) a crosslinked organic particle that is pyrolyzable at a pyrolysis temperature that is less than the sintering temperature of the host metal;
- lyophilizing the frozen liquid containing the flow additive nanoparticles, thereby forming flow additive agglomerates having a porous, fractal structure;
- mixing the flow additive agglomerates with a host metal to form a build material mixture;
- during mixing, monitoring a Hausner Ratio of the build material mixture;
- and
- stopping mixing when a build material composition having a Hausner Ratio less than 1.25 is formed.
Dependencies are inferred from the claim text.