Refractory metal plates with improved uniformity of texture

Patent metadata

Field	Value
Publication number	US-10236164-B2
Application number	US-201715682605-A
Country	US
Kind code	B2
Filing date	Aug 22, 2017
Priority date	Aug 6, 2007
Publication date	Mar 19, 2019
Grant date	Mar 19, 2019

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.

First claim

What is claimed is:

1. 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.

2. The refractory metal plate of claim 1 , wherein the maximum through-thickness gradient is less than or equal to 9% per mm for 111//ND.

3. The refractory metal plate of claim 1 , wherein the maximum through-thickness gradient is less than or equal to 8% per mm for 111//ND.

4. The refractory metal plate of claim 1 , wherein the average through-thickness gradient is less than or equal to 4% per mm for 111//ND.

5. The refractory metal plate of claim 1 , wherein the average through-thickness gradient is less than or equal to 3% per mm for 111//ND.

6. The refractory metal plate of claim 1 , wherein the refractory metal plate has a grain size that is less than 60 μm.

7. The refractory metal plate of claim 1 , wherein the metal plate is at least 99.95% pure refractory metal.

8. The refractory metal plate of claim 1 , wherein the refractory metal comprises tantalum.

9. The refractory metal plate of claim 1 , wherein the refractory metal comprises niobium.

10. 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.

11. The refractory metal plate of claim 10 , wherein the average banding severity is less than or equal to 5% per mm for 111//ND.

12. The refractory metal plate of claim 10 , wherein the average banding severity is less than or equal to 4% per mm for 111//ND.

13. The refractory metal plate of claim 10 , wherein the refractory metal plate has a grain size that is less than 60 μm.

14. The refractory metal plate of claim 10 , wherein the metal plate is at least 99.95% pure refractory metal.

15. The refractory metal plate of claim 10 , wherein the refractory metal comprises tantalum.

16. The refractory metal plate of claim 10 , wherein the refractory metal comprises niobium.

17. 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.

18. The refractory metal plate of claim 17 , wherein the average banding severity is less than or equal to 7% per mm for 111//ND.

19. The refractory metal plate of claim 17 , wherein the average banding severity is less than or equal to 5% per mm for 111//ND.

20. The refractory metal plate of claim 17 , wherein the refractory metal plate has a grain size that is less than 60 μm.

21. The refractory metal plate of claim 17 , wherein the metal plate is at least 99.95% pure refractory metal.

22. The refractory metal plate of claim 17 , wherein the refractory metal comprises tantalum.

23. The refractory metal plate of claim 17 , wherein the refractory metal comprises niobium.

Assignees

• Starck H C Inc

Inventors

• Jepson Peter R
• Bozkaya Dincer

Classifications

• Y10T428/12014

  having metal particles · CPC title

• B21B2267/065

  Top and bottom roll have different diameters; Asymmetrical rolling · CPC title

• B21B39/04

  Lifting or lowering work for conveying purposes, e.g. tilting tables arranged immediately in front of or behind the pass (turn-over or like manipulating means as such B21B39/20) · CPC title

• Y10T428/12

  All metal or with adjacent metals · CPC title

• B22F3/18

  by using pressure rollers · CPC title