A carburized La.sub.2O.sub.3 and Lu.sub.2O.sub.3 co-doped Mo filament cathode is made from lanthanum oxide (La.sub.2O.sub.3) and lutetium oxide (Lu.sub.2O.sub.3) doped molybdenum (Mo) powders, the lanthanum oxide (La.sub.2O.sub.3) and lutetium oxide (Lu.sub.2O.sub.3) doped molybdenum (Mo) powders contain La.sub.2O.sub.3, Lu.sub.2O.sub.3 and Mo with the total concentration of La.sub.2O.sub.3 and Lu.sub.2O.sub.3 being 2.0-5.0 wt. % and the rest being Mo.

A composite material for medical devices includes a superelastic shape memory alloy configured or constituting a matrix and a metal oxide which is dispersed in the matrix.

A metal matrix composite comprises and/or consists of a uniform distribution of calcined ceramic particles having an average particle size of between 0.30 and 0.900 microns and a metal or alloy uniformly distributed with the ceramic particles and wherein the ceramic particles include oxides of two separate metals selected from the group consisting of Al, Li, Be, Pb, Fe, Ag, Au, Sn, Mg, Ti, Cu, and Zn, and in which said ceramic particles comprise at least 15 volume percent of the metal matrix sintered together and wherein said metal-matrix being machinable with a high speed steel (HSS) bit for greater than about one minute without excessive wear to the bit.

A system for debinding a green body in the form of an orthodontic appliance may include a pressure vessel configured to contain a supercritical fluid. A source of a fluid chemical may be coupled to the pressure vessel to supply the fluid chemical to the pressure vessel. A heat source may be configured to heat the fluid chemical. A pump may pressurize the fluid chemical to at least the supercritical pressure. A collection vessel is coupled to the pressure vessel to capture the binder removed from the green bodies as at least the pressure of the supercritical fluid is reduced. A method of manufacturing an orthodontic appliance includes exposing green bodies including particles and a binder to a supercritical fluid to remove at least some of the binder from the green bodies, and collecting the removed binder from the supercritical fluid as the supercritical fluid transitions to a non-supercritical fluid.

A structured three-phase composite which include a metal phase, a ceramic phase, and a gas phase that are arranged to create a composite having low thermal conductivity, having controlled stiffness, and a CTE to reduce thermal stresses in the composite when exposed to cyclic thermal loads. The structured three-phase composite is useful for use in structures such as, but not limited to, heat shields, cryotanks, high speed engine ducts, exhaust-impinged structures, and high speed and reentry aeroshells.

Metallic matrix composites include a high strength titanium aluminide alloy matrix and an in situ formed aluminum oxide reinforcement. The atomic percentage of aluminum in the titanium aluminide alloy matrix can vary from 40% to 48%. Included are methods of making the metallic matrix composites, in particular, through the performance of an exothermic chemical reaction. The metallic matrix composites can exhibit low porosity.

A system for debinding a green body in the form of an orthodontic appliance may include a pressure vessel configured to contain a supercritical fluid. A source of a fluid chemical may be coupled to the pressure vessel to supply the fluid chemical to the pressure vessel. A heat source may be configured to heat the fluid chemical. A pump may pressurize the fluid chemical to at least the supercritical pressure. A collection vessel is coupled to the pressure vessel to capture the binder removed from the green bodies as at least the pressure of the supercritical fluid is reduced. A method of manufacturing an orthodontic appliance includes exposing green bodies including particles and a binder to a supercritical fluid to remove at least some of the binder from the green bodies, and collecting the removed binder from the supercritical fluid as the supercritical fluid transitions to a non-supercritical fluid.

A syntactic metal foam composite that is substantially fully dense except for syntactic porosity is formed from a mixture of ceramic microballoons and matrix forming metal. The ceramic microballoons have a uniaxial crush strength and a much higher omniaxial crush strength. The mixture is continuously constrained while it is consolidated. The constraining force is less than the omniaxial crush strength. The substantially fully dense syntactic metal foam composite is then constrained and deformation worked at a substantially constant volume. The deformation working is typically performed at a yield strength that is adjusted by way of selecting a working temperature at which the yield strength is approximately less than the omniaxial crush strength of the included ceramic microballoons. This deformation causes at least work hardening and grain refinement in the matrix metal.

A heat-resistant molybdenum alloy of this invention comprises a first phase containing Mo as a main component and a second phase comprising a MoSiB-based intermetallic compound particle phase, wherein the balance is an inevitable impurity and wherein the Si content is 0.05 mass % or more and 0.80 mass % or less and the B content is 0.04 mass % or more and 0.60 mass % or less.

In an aspect, an electrochemical cell comprises: a positive electrode; a negative electrode, said negative electrode having an alloy having a composition comprising V; and an electrolyte; wherein an additive is provided in said electrolyte to form primary vanadate ions upon dissociation of said additive in said electrolyte; and wherein the electrochemical cell is a metal hydride battery. In some embodiments of this aspect, the alloy is configured to sorb hydrogen during charging of said electrochemical cell and desorb hydrogen during discharging of said electrochemical cell. In some embodiments of this aspect, the electrolyte has a pH selected from the range of 13 to 15.