Abstract:
In an aspect, a printer fabricates an object from a computerized model using a fused filament fabrication process and a metallic build material. An ultrasonic vibrator is incorporated into the printer to improve the printing process, e.g., by disrupting a passivation layer on the deposited material to improve interlayer bonding, and to prevent adhesion of the metallic build material to a nozzle and other printer components.
Abstract:
The invention relates to an additive method for producing metal parts having an amorphous, crystalline and/or semi-crystalline structure for medical technology, rapid prototyping and rapid manufacturing, rapid tooling as well as all domains, in which RP-technologies are used, rapid manufacturing of lightweight components for the aerospace industry (closed honeycomb structures, etc) and the direct production of special parts and replacement parts (Selective Amorphous Metal Extrusion (SAME)). An amorphous, metallic starting material is heated in an extruder (9) by means of an extrusion method to above the glass transition range for generating a thermoplastic behavior, is extruded, is then selectively applied in two dimensions onto a construction platform (10) in the form of an extruded metal thread, and is subsequently cooled, wherein the two-dimensional application and the cooling of the extruded material thread is continued until the metal part is completed. The installation for carrying out the method consists of a three-dimensionally displaceable kinematic system (8), a construction platform (10) and an extruder (9) arranged on the three-dimensionally displaceable kinematic system (8). The extruder (9) comprises an extruder screw (1) for the amorphous, metallic starting material that is to-be extruded, a heated or partially heated housing (2) and an exchangeable nozzle (3) arranged on the housing (2). According to the invention, an active cooling (4) is directed below the nozzle (3) onto the extruded material exiting the nozzle (3).
Abstract:
Disclosed is a method of brazing articles together to form at least one braze defined by complementarily curved faying surfaces on the articles, the faying surfaces each having at least one region of curvature comprising at least one point from which the surface curves in more than one direction, the method comprising the steps of: a) disposing between the complementarily curved faying surfaces at least one amorphous brazing alloy preform of complementary curvature at least in part to said at least one region of the complementarily curved faying surfaces to conform to the complementarily curved faying surfaces in said region; and b) heating the articles and at least one amorphous brazing alloy preform to a brazing temperature at which the amorphous brazing alloy flows and brazes. and brazing alloy preforms for use in such methods. Methods of forming an article comprising a curved surface from a sheet of an amorphous metal alloy are disclosed, by applying heat from a fluid to a sheet of the amorphous metal alloy to raise at least a portion of the sheet to a temperature above the glass transition temperature T g and below the crystallization temperature T x .
Abstract:
An apparatus for, and a method of, controlling magnetic anisotropy in a magnetic material comprises directing a layer of powdered metal material to a heat conducting substrate. Electromagnetic energy is applied to the powdered material sufficient to melt the powdered material which is subsequently cooled to create a solid layer on the substrate. An external magnetic field is applied to the material during at least the cooling step so as to imprint the solid magnetic material layer with magnetic anisotropy. Various novel magnetic structures can be fabricated using the technique.
Abstract translation:公开了以Fe100-xy-zSixByPz为主要成分的非晶态软磁性合金,其中x,y和z为满足不等式为0.5 = x = 15,5 = y = 25,z = 15和18 = x + y + z = 30。 该合金相对于主成分还含有0.01〜0.3质量%的Mn,0.0001-0.01质量%的Al,0.001-0.03质量%的Ti,0.005-0.2质量%的Cu和0.001-0.05质量%的S.
Abstract:
Metal nanoparticles and methods for the production thereof. The novel nanoparticles having an average particle size of 1 to 10 nm and comprising at least one protective group bonded to metal, in particular copper particles, said group being derived from a monomeric thiol. They can be produced by reducing, in the presence of a reducing agent, dithioester monomers to the corresponding thiols while simultaneously reducing a copper precursor to the corresponding metal to yield amorphous or nanocrystalline copper nanoparticles. The novel metal nanoparticles can be used for producing semiconductive or conductive thin layers on a substrate.
Abstract:
Die Erfindung betrifft ein Verfahren zur Herstellung einer insbesondere dynamisch belasteten Fahrzeugkomponente mit hoher Warmfestigkeit und umfasst folgende Schritte: a) Bereitstellen von gasverdüsten Partikeln aus Aluminium oder einer Aluminiumlegierung, wobei eine durchschnittliche Größe der Partikel weniger als 10 μm beträgt, b) Verdichten der Partikel, optional in Kombination mit Verstärkungspartikeln, zu einem formstabilen Block, danach c) Umformen des Blockes bei einer Temperatur von zumindest 250 °C, d) Erstellen der Fahrzeugkomponente aus dem umgeformten Block oder Teilen davon.
Abstract:
Amorphous Fe- and Co-based metal foams and methods of preparing the same are provided. The Fe- and Co-based foams are prepared from Fe- and Co-based metal alloys of low hydrogen solubility having an atomic fraction of Fe or Co greater than or equal to the atomic fraction of each other alloying element. A method for producing the Fe- and Co- based foams includes the in situ decomposition of a hydride in a molten Fe- or Co-based alloy.