Abstract: A method of forming an article comprises forming a feed material around one or more shapeholders and sintering the feed material and the one or more shapeholders to form a sintered article comprising the one or more shapeholders in a base material. The sintered article is exposed to a solvent to remove the one or more shapeholders from the base material. Additional methods are disclosed, as well as articles including one or more microchannels exhibiting a diameter of from about 5 ?m to about 10 mm.

Abstract: A method of forming an article comprises placing a first material and a second material in a die of a direct current sintering apparatus. The second material directly contacts the first material. An electric current and pressure are applied to the first material and the second material to form an article. An additional method comprises placing a nickel-based material in direct contact with one or more other nickel-based materials to form a stack of nickel-based materials. An electric current and pressure are applied to the stack of nickel-based materials to join the nickel-based material and the one or more other nickel-based materials. Related articles are also disclosed.

Abstract: The present document generally relates to additive manufacturing techniques for forming an article having a desired shape and other properties. More particularly, but not exclusively, in one embodiment a method for additive manufacturing an article includes adding a dispersant to an article forming material in the absence of binder to prepare a slurry or suspension including the material and the dispersant. The pH of the slurry may be adjusted to control the viscosity and/or coagulation rate of the slurry. The slurry may then be passed through an extrusion-based three-dimensional printing apparatus to form or print the article in a desired form or shape, and the article may thereafter be sintered. In one aspect, through control of the pH of the slurry, the viscosity and/or coagulation rate properties of the slurry may be tailored for use with different operating parameters of the extrusion-based three-dimensional printing apparatus.

Abstract: The present document generally relates to additive manufacturing techniques for forming an article having a desired shape and other properties. More particularly, but not exclusively, in one embodiment a method for additive manufacturing an article includes adding a dispersant to an article forming material in the absence of binder to prepare a slurry or suspension including the material and the dispersant. The pH of the slurry may be adjusted to control the viscosity and/or coagulation rate of the slurry. The slurry may then be passed through an extrusion-based three-dimensional printing apparatus to form or print the article in a desired form or shape, and the article may thereafter be sintered. In one aspect, through control of the pH of the slurry, the viscosity and/or coagulation rate properties of the slurry may be tailored for use with different operating parameters of the extrusion-based three-dimensional printing apparatus.

Abstract: Metallic glasses of superior mechanical and magnetic properties are manufactured by annealing the glasses under the influence of an electric current to convert the glass to a composite that includes crystallites, preferably nanocrystallites, dispersed through an amorphous matrix.