A deformation-driven solid-phase extrusion device and a one-step alloy bar preparation method by using the same are provided. The device includes a stir tool, an extrusion container and an ejector rod. The stir tool has an integral structure composed of an upper mounting part and a lower working part and having a hollow channel. The lower working part is disposed in a groove of the extrusion container, and the ejector rod is disposed in the hollow channel of the stir tool. The method includes adding alloy powder to the extrusion container, enabling the stir tool to exert a pressure and revolve at a high speed to cause large plastic deformation of the powder and generate heat by friction and deform among powder and the friction working surface of the working part, sintering the alloy powder and extruding the same through the hollow channel of the stir tool.

A deformation-driven solid-phase extrusion device and a one-step alloy bar preparation method by using the same are provided. The device includes a stir tool, an extrusion container and an ejector rod. The stir tool has an integral structure composed of an upper mounting part and a lower working part and having a hollow channel. The lower working part is disposed in a groove of the extrusion container, and the ejector rod is disposed in the hollow channel of the stir tool. The method includes adding alloy powder to the extrusion container, enabling the stir tool to exert a pressure and revolve at a high speed to cause large plastic deformation of the powder and generate heat by friction and deform among powder and the friction working surface of the working part, sintering the alloy powder and extruding the same through the hollow channel of the stir tool.

An apparatus for fabricating a three-dimensional object from deposition of layers made of reinforcement material and of extrudable material is described. The apparatus comprises: an extrusion assembly comprising a feeder having a longitudinal hole adapted for conveying the reinforcement material and wherein the feeder is adapted for conveying the extrudable material at least partly outside the longitudinal hole; a reinforcement material driving mechanism for driving the reinforcement material to the extrusion assembly; and a building platform on which is made the deposition of layers of reinforcement material and of extrudable material.

An apparatus for fabricating a three-dimensional object from deposition of layers made of reinforcement material and of extrudable material is described. The apparatus comprises: an extrusion assembly comprising a feeder having a longitudinal hole adapted for conveying the reinforcement material and wherein the feeder is adapted for conveying the extrudable material at least partly outside the longitudinal hole; a reinforcement material driving mechanism for driving the reinforcement material to the extrusion assembly; and a building platform on which is made the deposition of layers of reinforcement material and of extrudable material.

A deformation-driven solid-phase extrusion device and a one-step alloy bar preparation method by using the same are provided. The device includes a stir tool, an extrusion container and an ejector rod. The stir tool has an integral structure composed of an upper mounting part and a lower working part and having a hollow channel. The lower working part is disposed in a groove of the extrusion container, and the ejector rod is disposed in the hollow channel of the stir tool. The method includes adding alloy powder to the extrusion container, enabling the stir tool to exert a pressure and revolve at a high speed to cause large plastic deformation of the powder and generate heat by friction and deform among powder and the friction working surface of the working part, sintering the alloy powder and extruding the same through the hollow channel of the stir tool.

A deformation-driven solid-phase extrusion device and a one-step alloy bar preparation method by using the same are provided. The device includes a stir tool, an extrusion container and an ejector rod. The stir tool has an integral structure composed of an upper mounting part and a lower working part and having a hollow channel. The lower working part is disposed in a groove of the extrusion container, and the ejector rod is disposed in the hollow channel of the stir tool. The method includes adding alloy powder to the extrusion container, enabling the stir tool to exert a pressure and revolve at a high speed to cause large plastic deformation of the powder and generate heat by friction and deform among powder and the friction working surface of the working part, sintering the alloy powder and extruding the same through the hollow channel of the stir tool.

A method for producing a cooling device includes the steps of providing a material and forming a cooling structure from the material, a sinter powder being used as the material, from which a green compact is produced by pressing, the green compact being sintered into a preform, and the cooling structure in the form of cooling elements being produced from the preform by forming, for which a part of the preform is pressed through a forming tool, forming being carried out in a plurality of forming steps.