California Institute of Technology

USA As Represented by Secretary of the Navy

Katherine T Faber

Rustem F Ismagilov

Julia A Kornfield

Orland Bateman

Noriaki Arai

Edward P Gorzkowski, Iii

Richard Robert Hofer

James A Wollmershauser

Bryan William McEnerney

Celia S Chari

Aspects disclosed herein include graphite and hexagonal boron nitride bimaterials, methods of making these bimaterials, and electric propulsion devices or thrusters with these bimaterials. Aspects disclosed herein include electric propulsion devices comprising: at least one portion comprising or formed of a monolithic bimaterial; wherein the monolithic bimaterial comprises a graphite material and a hexagonal boron nitride material; and wherein the graphite material and hexagonal boron nitride material are monolithically integrated in the bimaterial.

Graphite/hexagonal boron nitride bimaterials for electric propulsion

Provided herein are methods for making a freeze-cast material having a internal structure, the methods comprising steps of: determining the internal structure of the material, the internal structure having a plurality of pores, wherein: each of the plurality of pores has directionality; and the step of determining comprises: selecting a temperature gradient and a freezing front velocity to obtain the determined internal structure based on the selected temperature gradient and the selected freezing front velocity; directionally freezing a liquid formulation to form a frozen solid, the step of directionally freezing comprising: controlling the temperature gradient and the freezing front velocity to match the selected temperature gradient and the selected freezing front velocity during directionally freezing; wherein the liquid formulation comprises at least one solvent and at least one dispersed species; and subliming the at least one solvent out of the frozen solid to form the material.

Freeze-cast ceramic membrane for size based filtration

Growing community of inventors

Pasadena, CA, United States of America

Katherine T Faber