Slurry mixtures for 3-D slurry extrusion of artifacts

A method of forming an article using additive manufacturing, the method comprising:

• providing a slurry composition comprising:
• less than 70 vol. % of a carrier having a viscosity of at least 0.001 cP at normal temperature and pressure, wherein the carrier is adapted to be flowable through a nozzle, the carrier consisting of a sol-gel of a hydroxyethyl cellulose in an amount of from 0.1 to 10 wt. % based on the total weight of the carrier, a phenolic binder in an amount of from 0.1 to 10 wt. % based on the total weight of the carrier, and the balance a solvent that is a 50/50 mixture of water and ethanol;
• and
• 5 to 55 wt. % of a material that is an inorganic carbon-containing material consisting of a mixture of graphite microbeads and milled carbon fibers;
• and
• applying the slurry composition to a substrate to form the article.