IP Library › Granted Patent US 12,428,708
Granted Patent B2
US 12,428,708 · App. 18/333,649 · Granted Sep 30, 2025

Tantalum based alloy that is resistant to aqueous corrosion

Inventors: Paul R. Aimone (Bridgewater, MA); Evan Hinshaw (Hickory, NC)
Assignee: MATERION NEWTON INC.
C22C27/02C22B9/20C22B9/22C22B34/24
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Quick Facts
Patent No.
US 12,428,708
App. No.
18/333,649
Granted
Sep 30, 2025
Kind
B2
Abstract

A tantalum or tantalum alloy which contains pure or substantially pure tantalum and at least one metal element selected from the group consisting of Ru, Rh, Pd, Os, Ir, Pt, Mo, W and Re to form a tantalum alloy that is resistant to aqueous corrosion. The invention also relates to the process of preparing the tantalum alloy.

Claims (14)

1. A tantalum alloy resistant to aqueous corrosion and consisting essentially of Ta-3W-Re, wherein Re is present in an amount of at least 500 ppm and at most 5,000 ppm, and at least one additional element of yttrium, gold, cerium, praseodymium, neodymium or thorium.

2. The tantalum alloy of claim 1 , wherein Ta is present in an amount of at least 89%.

3. The tantalum alloy of claim 1 , wherein the tantalum alloy is prepared by microalloying.

4. The tantalum alloy of claim 3 , wherein the microalloying is performed via laser manufacturing.

5. The tantalum alloy of claim 3 , wherein the microalloying is performed via vacuum arc remelting.

6. The tantalum alloy of claim 3 , wherein the microalloying is performed via electron beam melting.

7. The tantalum alloy of claim 3 , wherein the microalloying is performed via plasma arc melting.

8. A tantalum alloy resistant to aqueous corrosion and consisting essentially of Ta-3W-Re, wherein Re is present in an amount of at least 50 ppm and at most 2,000 ppm.

9. The tantalum alloy of claim 8 , wherein Ta is present in an amount of at least 89%.

10. The tantalum alloy of claim 8 , wherein the tantalum alloy is prepared by microalloying.

11. The tantalum alloy of claim 10 , wherein the microalloying is performed via laser manufacturing.

12. The tantalum alloy of claim 10 , wherein the microalloying is performed via vacuum arc remelting.

13. The tantalum alloy of claim 10 , wherein the microalloying is performed via electron beam melting.

14. The tantalum alloy of claim 10 , wherein the microalloying is performed via plasma arc melting.

Assignments (4)
CONFIRMATORY GRANT OF SECURITY INTEREST IN UNITED STATES PATENTS Recorded Jun 26, 2025
From: MATERION NEWTON INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 071751/0100 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 10, 2024
From: AIMONE, PAUL R.; HINSHAW, EVAN B.
To: H.C. STARCK INC.
Reel/Frame 066076/0301 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 20, 2023
From: AIMONE, PAUL R.; HINSHAW, EVAN
To: H.C. STARCK INC.
Reel/Frame 066093/0782 →
CHANGE OF NAME Recorded Dec 20, 2023
From: H.C. STARCK INC.
To: MATERION NEWTON INC.
Reel/Frame 066093/0843 →
Continuity (7)
Continuation 17227616 · Apr 12, 2021
Continuation 16540215 · Aug 14, 2019
Continuation 15928187 · Mar 22, 2018
Continuation 15643980 · Jul 7, 2017
Continuation 12109765 · Apr 25, 2008
Provisional Application 60914474 · Apr 27, 2007
Related Publication 20230340648A1 · Oct 26, 2023
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