In some examples, an additive manufacturing technique for forming a vacuum insulator. For example, a method including forming an article including a first layer, a second layer, and at least one support member extending between the first and second layer by depositing a filament via a filament delivery device, wherein the filament includes a sacrificial binder and a powder, and wherein the first layer, second layer, and at least one support member define an open cavity within the article; removing the binder; and sintering the article to form the vacuum insulator, wherein the vacuum insulator defines a vacuum environment in the cavity.

In some examples, an additive manufacturing technique for forming a vacuum insulator. For example, a method including forming an article including a first layer, a second layer, and at least one support member extending between the first and second layer by depositing a filament via a filament delivery device, wherein the filament includes a sacrificial binder and a powder, and wherein the first layer, second layer, and at least one support member define an open cavity within the article; removing the binder; and sintering the article to form the vacuum insulator, wherein the vacuum insulator defines a vacuum environment in the cavity.

Methods of making metal objects are provided. These methods generally involve adding a metal powder slurry into a sacrificial mold, such as a mold made by three dimensional printing, and heating the slurry/mold mixture. The heating steps may include curing the slurry to make a green part inside the mold, debinding to burn off the mold and binder to make a brown part, sintering, and hot isostatic pressing. Metal products, such as aircraft engine parts, are also provided.

An isostatically pressed product (10, 11, 12, 13, 14) for use in handling of molten metals comprising: a body (20) made from a first refractory composition (50); the body (20) comprises a surface (21); and at least one liner section (30.1) applied partially onto the surface (21) of the body (20); the at least one liner section (30.1) is made from a second refractory composition (51); the at least one liner section (30.1, 30.2) forming the liner (30) of the body (20); whereas in at least one cross-section of the product, the surface (21) of the body (20) in a region covered with the liner (30), comprises at least one convex (41) and at least two concave (42) sections and a method for manufacturing an isostatically pressed product (10, 11, 12, 13, 14) for use in handling of molten metals.

A method for 3D printing includes printing a first metallic material on a substrate as a support structure (48). A second metallic material, which is less anodic than the first metallic material, is printed on the substrate as a target structure (46), in contact with the support structure. The support structure is chemically removed from the target structure by applying a galvanic effect to selectively corrode the first metallic material.

A method for 3D printing includes printing a first metallic material on a substrate as a support structure (48). A second metallic material, which is less anodic than the first metallic material, is printed on the substrate as a target structure (46), in contact with the support structure. The support structure is chemically removed from the target structure by applying a galvanic effect to selectively corrode the first metallic material.

This invention provides a method for manufacturing parts with a built-in channel. Two kinds of materials with different melting points are used, the material with the lower melting point is a molding element with an arbitrary shape, the material with the higher melting point is powdered, and the material with the low melting point is wrapped and positioned in the powder with the high melting point. When the preparation is completed, the low-temperature material is melted down, and the channel with the random shape is formed after sintering. In the application that the metal parts need supply water, air, or oil, instead of the channel acquired by mechanical splicing or the channel molded by 3D printing technology, this method in the invention is with a wide application range, the lower cost, and the simple and controllable technology, and is suitable for mass production and with very broad market prospects.

In various embodiments, a sputtering target initially formed by ingot metallurgy or powder metallurgy and rejuvenated by, e.g., cold spray, is utilized in sputtering processes to produce metallic thin films.

The present disclosure generally relates to casting molds including a casting core comprising a first metal component and a second metal component. In an aspect, the first metal component has a lower melting point than the second metal component. In another aspect, the second metal component surrounds at least a portion of the first metal component and defines a cavity in the casting core when the first metal component is removed and the second metal component is not removed.

The present disclosure generally relates to investment casting molds comprising a casting core comprising at least one graded core component, the graded core component comprising at least one graded transition between a first core material and a second core material.