A method, product, apparatus, and article of manufacture for the application of the Composite Based Additive Manufacturing (CBAM) method to produce objects in metal, and in metal fiber hybrids or composites. The approach has many advantages, including the ability to produce more complex geometries than conventional methods such as milling and casting, improved material properties, higher production rates and the elimination of complex fixturing, complex tool paths and tool changes and, for casting, the need for patterns and tools. The approach works by slicing a 3D model, selectively printing a fluid onto a sheet of substrate material for each layer based on the model, flooding onto the substrate a powdered metal to which the fluid adheres in printed areas, clamping and aligning a stack of coated sheets, heating the stacked sheets to melt the powdered metal and fuse the layers of substrate, and removing excess powder and unfused substrate.

The present disclosure relates generally to wires and more particularly to textured powder wires containing nanoscale metallic silver powder. The invention presents an improvement of the process of making compressed cores of textured-powder high-temperature superconductor previously using the micaceous high-temperature superconductor Bi-2212. Embodiments of the claimed methods are useful with the micaceous high-temperature superconductors, notably Bi2Sr2CaCu2O8+x (Bi-2212) and Bi2Sr2Ca2Cu3O10+x (Bi-2223) and rare earth barium copper oxide (REBCO).

A method of making a pre-sintered preform, including forming a pre-sintered preform by a binder jet additive manufacturing technique. The binder jet additive manufacturing technique includes depositing a first powder layer including a first powder and a second powder followed by depositing a first binder at a pre-determined location of the first powder layer. The binder jet additive manufacturing technique also includes depositing a second powder layer over at least a portion of the first powder layer followed by depositing a second binder at a pre-determined location of the second powder layer. At least a portion of the first binder and at least a portion of the second binder is cured forming a green part. The green part is then densified to form a pre-sintered preform near net shape component.

A method of making a pre-sintered preform, including forming a pre-sintered preform by a binder jet additive manufacturing technique. The binder jet additive manufacturing technique includes depositing a first powder layer including a first powder and a second powder followed by depositing a first binder at a pre-determined location of the first powder layer. The binder jet additive manufacturing technique also includes depositing a second powder layer over at least a portion of the first powder layer followed by depositing a second binder at a pre-determined location of the second powder layer. At least a portion of the first binder and at least a portion of the second binder is cured forming a green part. The green part is then densified to form a pre-sintered preform near net shape component.

Raw material powder containing iron powder, copper powder, and tin powder is compressed to form a green compact. The green compact is sintered in a temperature range of from 750 to 900° C., to bond iron structures to each other with copper and tin.

A method for producing a rare earth magnet, including preparing a melt of a first alloy having a composition represented by (R.sup.1.sub.vR.sup.2.sub.wR.sup.3.sub.x).sub.yT.sub.zB.sub.sM.sup.1.sub.t (wherein R.sup.1 is a light rare earth element, R.sup.2 is an intermediate rare earth element, R.sup.3 is a heavy rare earth element, T is an iron group element, and M.sup.1 is an impurity element, etc.), cooling the melt of the first alloy at a rate of from 10.sup.0 to 10.sup.2 K/sec to obtain a first alloy ingot, pulverizing the first alloy ingot to obtain a first alloy powder having a particle diameter of 1 to 20 μm, preparing a melt of a second alloy having a composition represented by (R.sup.4.sub.pR.sup.5.sub.q).sub.100-uM.sup.2.sub.u (wherein R.sup.4 is a light rare earth element, R.sup.5 is an intermediate or heavy rare earth element, M.sup.2 is an alloy element, etc.), and putting the first alloy powder into contact with the melt of the second alloy.

A method for producing a rare earth magnet, including preparing a melt of a first alloy having a composition represented by (R.sup.1.sub.vR.sup.2.sub.wR.sup.3.sub.x).sub.yT.sub.zB.sub.sM.sup.1.sub.t (wherein R.sup.1 is a light rare earth element, R.sup.2 is an intermediate rare earth element, R.sup.3 is a heavy rare earth element, T is an iron group element, and M.sup.1 is an impurity element, etc.), cooling the melt of the first alloy at a rate of from 10.sup.0 to 10.sup.2 K/sec to obtain a first alloy ingot, pulverizing the first alloy ingot to obtain a first alloy powder having a particle diameter of 1 to 20 μm, preparing a melt of a second alloy having a composition represented by (R.sup.4.sub.pR.sup.5.sub.q).sub.100-uM.sup.2.sub.u (wherein R.sup.4 is a light rare earth element, R.sup.5 is an intermediate or heavy rare earth element, M.sup.2 is an alloy element, etc.), and putting the first alloy powder into contact with the melt of the second alloy.

A thermoelectric conversion material includes a sintered body including a main phase including a plurality of crystal grains including Ce, Mn, Fe, and Sb and forming a skuttterudite structure, and a grain boundary between crystal grains adjacent to each other. The grain boundary includes a sintering aid phase including at least Mn, Sb, and O. Thus, with respect to a skutterudite-type thermoelectric conversion material including Sb, which is a sintering-resistant material, it is possible to improve sinterability while maintaining a practical dimensionless figure-of-merit ZT, and to reduce processing cost.

A thermoelectric conversion material includes a sintered body including a main phase including a plurality of crystal grains including Ce, Mn, Fe, and Sb and forming a skuttterudite structure, and a grain boundary between crystal grains adjacent to each other. The grain boundary includes a sintering aid phase including at least Mn, Sb, and O. Thus, with respect to a skutterudite-type thermoelectric conversion material including Sb, which is a sintering-resistant material, it is possible to improve sinterability while maintaining a practical dimensionless figure-of-merit ZT, and to reduce processing cost.

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.