IP Library › Granted Patent US 12,746,596
Granted Patent B2
US 12,746,596 · App. 18/513,326 · Granted Sep 29, 2026

Systems and methods for synthesis of spheroidized metal powders

Inventors: Sunil Bhalchandra Badwe (Export, PA); Scott Joseph Turchetti (Newburyport, MA); Sudip Bhattacharya (Billerica, MA); Makhlouf Redjdal (Melrose, MA)
Assignee: 6K Inc.
B22F1/065B22F1/05B22F9/14B22F2202/13B22F2302/20B22F2304/10
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Quick Facts
Patent No.
US 12,746,596
App. No.
18/513,326
Granted
Sep 29, 2026
Kind
B2
Abstract

Disclosed herein are embodiments of systems and method for processing feedstock materials using microwave plasma processing. Specifically, the feedstock materials disclosed herein pertain to metal powders. Microwave plasma processing can be used to spheroidize the metal powders and form metal nitride or metal carbide powders. The stoichiometry of the metal nitride or metal carbide powders can be controlled by changing the composition of the plasma gas and the residence time of the feedstock materials during plasma processing.

Claims (55)

1 . A spheroidized titanium nitride powder comprising:

a plurality of titanium nitride particles exhibiting a substantially spherical shape,

the plurality of titanium nitride particles comprising a particle-size distribution between 15-106 microns and

the plurality of titanium nitride particles comprising at least one of the following phases: α-Ti, TiN, Ti 2 N, or TiN 2 ,

wherein the spheroidized titanium nitride powder is synthesized by processing a solid feedstock, and

wherein the plurality of particles comprise titanium nitride throughout the particles.

2 . The spheroidized titanium nitride powder of claim 1 , wherein the solid feedstock is a titanium feedstock and the spheroidized titanium nitride powder is synthesized by microwave plasma processing of the titanium feedstock.

3 . The spheroidized titanium nitride powder of claim 2 , wherein the plurality of particles comprise a microstructure formed by reacting the titanium feedstock with a nitrogen-containing plasma gas.

4 . The spheroidized titanium nitride powder of claim 1 , wherein the plurality of particles have a mean sphericity greater than 0.75.

5 . The spheroidized titanium nitride powder of claim 1 , wherein the plurality of particles have a median sphericity greater than 0.75.

6 . The spheroidized titanium nitride powder of claim 1 , wherein the spheroidized titanium nitride powder is manufactured by a method comprising:

providing the solid feedstock to a microwave plasma torch, the feedstock comprising titanium powder;

introducing the feedstock into a microwave plasma generated by the microwave plasma torch, the microwave plasma generated by subjecting a reactive plasma gas to microwaves from a microwave power source, the reactive plasma gas comprising at least nitrogen-containing gas; and

forming the spheroidized titanium nitride powder, the spheroidized titanium nitride powder formed by at least partially melting the feedstock and initiating a chemical reaction between the feedstock and the reactive plasma gas within the microwave plasma torch, and the spheroidized titanium nitride powder comprising one or more particles, the one or more particles comprising titanium nitride throughout a complete mass of the one or more particles,

wherein the one or more particles comprise a pre-determined concentration of nitrogen by controlling an amount of the nitrogen-containing gas and a residence time of the feedstock in the reactive plasma gas.

7 . The spheroidized titanium nitride powder of claim 6 , wherein the method further comprises selecting a desired porosity, composition, or microstructure of the spheroidized titanium nitride powder, and wherein the spheroidized titanium nitride powder comprises the desired porosity, composition, or microstructure.

8 . The spheroidized titanium nitride powder of claim 6 , wherein the titanium powder comprises gas atomized titanium powder, hydride-dehydride (HDH) titanium powder, or hydrided titanium powder.

9 . The spheroidized titanium nitride powder of claim 6 , wherein the nitrogen-containing gas comprises one or more of hydrogen, helium, neon, argon, krypton, or xenon.

10 . The spheroidized titanium nitride powder of claim 6 , wherein the reactive plasma gas comprises nitrogen gas (N 2 ).

11 . The spheroidized titanium nitride powder of claim 6 , wherein the chemical reaction comprises:

2

⁢

Ti

+

N

2

→

2

⁢

TiN

;

or

4

⁢

Ti

+

N

2

→

2

⁢

Ti

2

⁢

N

.

12 . The spheroidized titanium nitride powder of claim 1 , wherein the spheroidized titanium nitride powder is manufactured by a method comprising:

providing a metal powder as the solid feedstock to a microwave plasma torch;

introducing the feedstock into a microwave plasma generated by the microwave plasma torch, the microwave plasma generated by subjecting a nitrogen-containing gas to microwaves from a microwave power source; and

forming the spheroidized titanium nitride powder, the spheroidized titanium nitride powder formed by at least partially melting the feedstock and initiating a chemical reaction between the feedstock and the nitrogen-containing gas within the microwave plasma torch, and the spheroidized titanium nitride powder comprising one or more particles, the one or more particles comprising titanium nitride throughout a complete mass of the one or more particles,

wherein the one or more particles comprise a pre-determined concentration of nitrogen by controlling an amount of the nitrogen-containing gas and a residence time of the feedstock in the reactive plasma gas.

13 . The spheroidized titanium nitride powder of claim 12 , wherein the method further comprises selecting a desired porosity, composition, or microstructure of the spheroidized titanium nitride powder, and wherein the spheroidized titanium nitride powder comprises the desired porosity, composition, or microstructure.

14 . The spheroidized titanium nitride powder of claim 12 , wherein the metal powder comprises gas atomized titanium powder, hydride-dehydride (HDH) titanium powder, or hydrided titanium powder.

15 . The spheroidized titanium nitride powder of claim 12 , wherein the nitrogen-containing gas comprises one or more of hydrogen, helium, neon, argon, krypton, or xenon.

16 . The spheroidized titanium nitride powder of claim 12 , wherein the reactive plasma gas comprises nitrogen gas (N 2 ).

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 5, 2026
From: BADWE, SUNIL BHALCHANDRA; TURCHETTI, SCOTT JOSEPH; BHATTACHARYA, SUDIP; REDJDAL, MAKHLOUF
To: 6K INC.
Reel/Frame 074868/0066 →
Continuity (3)
Division 17451716 · Oct 21, 2021
Provisional Application 63108118 · Oct 30, 2020
Related Publication 20240342791A1 · Oct 17, 2024
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