Refractory metal plates with improved uniformity of texture
AssigneeH.C. Starck GmbH
InventorsPeter R. Jepson, Dincer Bozkaya
Life of this patent
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Abstract
A refractory metal plate is provided. The plate has a center, a thickness, an edge, a top surface and a bottom surface, and has a crystallographic texture (as characterized by through thickness gradient, banding severity; and variation across the plate, for each of the texture components 100//ND and 111//ND, which is substantially uniform throughout the plate.
Claims23
A refractory metal plate having a center, a thickness, an edge, a top surface, and a bottom surface, the refractory metal plate having a crystallographic texture as characterized by through thickness gradient, banding severity, and variation across the plate for at least one of the texture components 100//ND or 111//ND, using electron back-scatter diffraction with a 15 μm step in both the horizontal and vertical directions for each measurement, wherein:
- an average through-thickness gradient is less than or equal to 6% per mm for 111//ND, and
- a maximum through-thickness gradient is less than or equal to 13% per mm for 111//ND.
A refractory metal plate having a center, a thickness, an edge, a top surface, and a bottom surface, the refractory metal plate having a crystallographic texture as characterized by through thickness gradient, banding severity, and variation across the plate for at least one of the texture components 100//ND or 111//ND, using electron back-scatter diffraction with a 15 μm step in both the horizontal and vertical directions for each measurement, wherein an average banding severity is less than or equal to 6% per mm for 111//ND.
A refractory metal plate having a center, a thickness, an edge, a top surface, and a bottom surface, the refractory metal plate having a crystallographic texture as characterized by through thickness gradient, banding severity, and variation across the plate for at least one of the texture components 100//ND or 111//ND, using electron back-scatter diffraction with a 15 μm step in both the horizontal and vertical directions for each measurement, wherein a maximum banding severity is less than or equal to 8% per mm for 111//ND.
Dependencies are inferred from the claim text.