Massachusetts Institute of Technology

Michael I Cima

Emanuel Michael Sachs

James F Bredt

David Brancazio

Alain Curodeau

Tailin Fan

Neville Sonnenberg

Steven P Michaels

Satbir Khanuja

John A Smith

Alan Lauder

Sang-Joon J Lee

Harald Tuerck

An oxide superconductor article is provided having an oxide superconductor film having a thickness of greater than 0.5 microns disposed on a substrate, said article having a transport critical current density (J ) of greater than or equal to about 10 A/cm at 77K, zero field. The oxide superconductor film is characterized by high J and high volume percent of c-axis epitaxial oxide grains, even with thicknesses of up to 1 micron. The oxide superconductor article is prepared by providing a metal oxyfluoride film, said metal oxyfluoride film comprising the constituent metallic elements of an oxide superconductor in substantially stoichiometric proportions; and converting the metal oxyfluoride into the oxide superconductor at a rate of conversion selected by adjusting a reaction parameter selected from the group consisting of temperature, P , P , and time and combinations thereof, such that an oxide superconductor film having a transport critical current density of greater than or equal to about 10 A/cm at 77K, zero field is obtained.

Controlled conversion of metal oxyfluorides into superconducting oxides

A system for producing three dimensional components by bonding together successive layers of a porous material with droplets of a binder material. A binder printhead has an array of nozzles which controllably supply jets of binder material droplets to the layers of porous material. The printhead is scanned in a raster scan fashion over each layer of porous material along a first scan axis in one direction to provide first fast scanning paths of droplets. The printhead is then moved laterally of such one direction and is then moved along the fast-scan axis in the opposite direction to provide second fast scanning paths of droplets which are interlaced with the first scanning paths. The supply of the droplets to the porous material can be controlled so as to control the overlapping thereof to produce various desired surface and interior characteristics of the components.

Three dimensional printing methods

Three dimensional printing system

A process for making a component by depositing a first layer of a powder material in a confined region and then depositing a binder material to selected regions of the layer of powder material to produce a layer of bonded powder material at the selected regions. Such steps are repeated a selected number of times to produce successive layers of selected regions of bonded powder material so as to form the desired component. The unbonded powder material is then removed. In some cases the component may be further processed as, for example, by heating it to further strengthen the bonding thereof.

Three-dimensional printing techniques

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Winchester, MA, United States of America

Michael I Cima