In one example, an apparatus comprising a controller to instruct a build platform to support a plurality of layers of build material in a build zone, wherein the build platform is moveable during a build of a three-dimensional object to change the size of the build zone, wherein the controller is to determine respective displacements of the build platform to successively receive each of the plurality of layers of build material in the build zone during the build, wherein at least one of the respective displacements is based on data determined from a three-dimensional object obtained in a previous build.

An object of the present invention is to provide an electrically conductive paste and a sintered body thereof having a low electric resistance value and excellent electrical conductivity when made into a sintered body.

An electrically conductive paste comprising: a flake-like silver powder having a median diameter D50 of 15 μm or less; a silver powder having a median diameter D50 of 25 μm or more; and a solvent, wherein the content of the flake-like silver powder is 15 to 70 parts by mass and the content of the silver powder having a median diameter D50 of 25 μm or more is 30 to 85 parts by mass based on 100 parts by mass in total of the flake-like silver powder and the silver powder having a median diameter D50 of 25 μm or more.

An object of the present invention is to provide an electrically conductive paste and a sintered body thereof having a low electric resistance value and excellent electrical conductivity when made into a sintered body.

An electrically conductive paste comprising: a flake-like silver powder having a median diameter D50 of 15 μm or less; a silver powder having a median diameter D50 of 25 μm or more; and a solvent, wherein the content of the flake-like silver powder is 15 to 70 parts by mass and the content of the silver powder having a median diameter D50 of 25 μm or more is 30 to 85 parts by mass based on 100 parts by mass in total of the flake-like silver powder and the silver powder having a median diameter D50 of 25 μm or more.

An additive manufacturing metal paste and a method of additive manufacturing using the metal paste is presented. The metal paste includes a first metal component of a first majority-phase structural metal, the first majority-phase structural metal comprising approximately 75 wt. % to approximately 90 wt. % first metal particles having a particle size of approximately 1 micron to approximately 100 microns. The metal paste further includes a second metal component of a second bonding metal, the second bonding metal comprising approximately 3 wt. % to approximately 10 wt. %, the second metal particles having a particle size of approximately 3 nanometers to approximately 100 nanometers. The paste further includes a binder having a weight percentage of approximately 2 wt. % to approximately 15 wt. % wherein the metal paste has a sintering temperature of less than approximately 300° C.

An additive manufacturing metal paste and a method of additive manufacturing using the metal paste is presented. The metal paste includes a first metal component of a first majority-phase structural metal, the first majority-phase structural metal comprising approximately 75 wt. % to approximately 90 wt. % first metal particles having a particle size of approximately 1 micron to approximately 100 microns. The metal paste further includes a second metal component of a second bonding metal, the second bonding metal comprising approximately 3 wt. % to approximately 10 wt. %, the second metal particles having a particle size of approximately 3 nanometers to approximately 100 nanometers. The paste further includes a binder having a weight percentage of approximately 2 wt. % to approximately 15 wt. % wherein the metal paste has a sintering temperature of less than approximately 300° C.

A method for producing a copper-infiltrated valve seat ring and a valve seat ring are disclosed. The method includes introducing a copper powder and a functional material powder mixture into a joint cavity, simultaneously forming the copper powder and the functional material powder mixture into a green body comprising a functional section and a copper section in the joint cavity by the mold element, and sintering the green body formed in step b) to produce the valve seat ring where the copper section liquefies during the sintering and infiltrates pores present in the functional section.

A method for producing a copper-infiltrated valve seat ring and a valve seat ring are disclosed. The method includes introducing a copper powder and a functional material powder mixture into a joint cavity, simultaneously forming the copper powder and the functional material powder mixture into a green body comprising a functional section and a copper section in the joint cavity by the mold element, and sintering the green body formed in step b) to produce the valve seat ring where the copper section liquefies during the sintering and infiltrates pores present in the functional section.

In various embodiments, metallic alloy powders are formed at least in part by spray drying to form agglomerate particles and/or plasma densification to form composite particles.

A method for metal powder injection molding includes injecting a first metal powder of a TiAl-based intermetallic compound into a mold, and molding the first metal powder through use of an injection molding machine; injecting a second metal powder of a TiAl-based intermetallic compound having a same constituent as the first metal powder and having a different average particle diameter from the first metal powder into a mold, and molding the second metal powder through use of the injection molding machine; and sintering molded articles obtained by molding the first metal powder and the second metal powder, and producing a mixed sintered compact in which a first sintered compact of the molded article obtained by molding the first metal powder and a second sintered compact of the molded article obtained by molding the second metal powder are integrated.

A method for metal powder injection molding includes injecting a first metal powder of a TiAl-based intermetallic compound into a mold, and molding the first metal powder through use of an injection molding machine; injecting a second metal powder of a TiAl-based intermetallic compound having a same constituent as the first metal powder and having a different average particle diameter from the first metal powder into a mold, and molding the second metal powder through use of the injection molding machine; and sintering molded articles obtained by molding the first metal powder and the second metal powder, and producing a mixed sintered compact in which a first sintered compact of the molded article obtained by molding the first metal powder and a second sintered compact of the molded article obtained by molding the second metal powder are integrated.