Abstract: The invention relates to a process for fabricating complex mechanical shapes, and in particular to fabricating complex mechanical shapes using a pressure-assisted sintering technique to address problems relating to variations in specimen thickness and tooling, or densification gradients, by 3-D printing of a polymer model that is surrounded by and filled with sintering powder material, wherein the 3-D polymer model decomposed into a graphite interface layer and facilitates release of the cast, e.g. metal, metal-alloy, ceramic, etc., manufactured item.
Type:
Grant
Filed:
March 27, 2019
Date of Patent:
March 12, 2024
Assignees:
UNITED STATES OF AMERICA has certain rights in the invention from DOE Grant No. DE-SC0008581, San Diego State University
Abstract: The invention relates to a process for fabricating complex mechanical shapes from metal or ceramic, and in particular to fabricating complex mechanical shapes using a pressure-assisted sintering technique to address problems relating to variations in specimen thickness and tooling, or densification gradients, by 3-D printing of a sacrificial, self-destructing powder mold is created using e.g. alumina and swellable binders such as polysaccharides. The binder-free sintering powder that forms the manufactured item is injected into the mold, and high pressure is applied. The powder assembly can then be sintered by any pressure assisted technique to full densification and the self-destructing mold allows the release of the fully densified complex manufactured item.
Type:
Application
Filed:
April 26, 2019
Publication date:
July 29, 2021
Applicant:
UNITED STATES OF AMERICA has certain rights in the invention from DOE Grant No. DE-SC0008581
Inventors:
GEUNTAK LEE, Eugene Olevsky, Charles Maniere
Abstract: The invention relates to a process for fabricating complex mechanical shapes, and in particular to fabricating complex mechanical shapes using a pressure-assisted sintering technique to address problems relating to variations in specimen thickness and tooling, or densification gradients, by 3-D printing of a polymer model that is surrounded by and filled with sintering powder material, wherein the 3-D polymer model decomposed into a graphite interface layer and facilitates release of the cast, e.g. metal, metal-alloy, ceramic, etc., manufactured item.
Type:
Application
Filed:
March 27, 2019
Publication date:
January 21, 2021
Applicant:
UNITED STATES OF AMERICA has certain rights in the invention from DOE Grant No. DE-SC0008581