Spectral Emissivity and Temperature Measurements of Metal Powders during Continuous Processing in Powder Bed Fusion Additive Manufacturing
AssigneeBoard of Regents, The University of Texas System
InventorsRyan B. Wicker, Cesar A. Terrazas-Najera, Alfonso Fernandez, Ralph Felice
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Abstract
A method of measuring spectral emissivity of materials is provided. The method comprises placing material in a controlled chamber and exposing the material to an energy source to heat the material. At least one multi-wavelength pyrometer measures emitted thermal radiation from the material produced by heating by the energy source.
Claims20
A method of measuring spectral emissivity of materials, the method comprising:
- placing material in a controlled chamber;
- exposing the material to an energy source to heat the material;
- and
- measuring, with at least one multi-wavelength pyrometer, emitted thermal radiation from the material produced by heating by the energy source.
A method of measuring temperature of materials, the method comprising:
- placing material in a controlled chamber;
- exposing the material to an energy source to heat the material;
- and
- measuring, with at least one multi-wavelength pyrometer, emitted thermal radiation from the material produced by heating by the energy source.
An apparatus for measuring spectral emissivity or temperature of materials, the apparatus comprising:
- a controlled chamber configured to hold material, wherein the controlled chamber is vacuum controlled or filled with an inert gas;
- an energy source to heat the material;
- and
- at least one multi-wavelength pyrometer that measures emitted thermal radiation from the material produced by heating by the energy source, wherein the multi-wavelength pyrometer is positioned at a distal end of a tube extending from the chamber, wherein the tube provides a sacrificial surface for vapor condensation to prevent the vapor condensation from obscuring a view port used by the pyrometer.
Dependencies are inferred from the claim text.