Spheroidal dehydrogenated metals and metal alloy particles

Patent metadata

Field	Value
Publication number	US-11148202-B2
Application number	US-201615381336-A
Country	US
Kind code	B2
Filing date	Dec 16, 2016
Priority date	Dec 16, 2015
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

Methodologies, systems, and devices are provided for producing metal spheroidal powder products. Dehydrogenated and spheroidized particles are prepared using a process including introducing a metal hydride feed material into a plasma torch. The metal hydride feed material is melted within a plasma in order to dehydrogenate and spheroidize the materials, forming dehydrogenated and spheroidized particles. The dehydrogenated and spheroidized particles are then exposed to an inert gas and cooled in order to solidify the particles into dehydrogenated and spheroidized particles. The particles are cooled within a chamber having an inert gas.

First claim

What is claimed is:

1. Dehydrogenated and spheroidized particles prepared by a process comprising:
introducing a titanium hydride feed material into a plasma torch;
melting, dehydrogenating, and spheroidizing the feed material within the plasma to form dehydrogenated and spheroidized titanium particles;
exposing the dehydrogenated and spheroidized particles to an inert gas; and
cooling and solidifying the dehydrogenated and spheroidized particles in a chamber having the inert gas, the dehydrogenated and spheroidized particles having more than 90% spheroidization consistency,
wherein the solidified dehydrogenated and spheroidized particles comprise spheroidized titanium powder particles having a martensitic microstructure.

2. The particles of claim 1 , wherein the dehydrogenated and spheroidized particles are further deoxidized within the plasma.

3. The particles of claim 1 , wherein the feed material is exposed to a temperature profile between about 4,000 K and 8,000 K within the plasma.

4. The particles of claim 1 , wherein the feed material is exposed to a partial vacuum within the plasma.

5. The particles of claim 1 , wherein the feed material is exposed to a pressure greater than atmospheric pressure within the plasma.

6. The particles of claim 1 , wherein a particle size of the feed material is no less than 1.0 micrometers and no more than 300 micrometers.

7. The particles of claim 1 , wherein the hydride feed material is continuously introduced into the plasma.

8. The particles of claim 1 , wherein the hydride feed material is purged with an inert gas prior to introducing the hydride feed material into the plasma torch.

9. The particles of claim 1 , wherein the plasma torch comprises a microwave generated plasma torch.

10. A method of producing dehydrogenated and spheroidized particles comprising:
introducing a titanium hydride feed material into a plasma torch;
directing the feed material toward a plasma within the plasma torch;
melting, dehydrogenating and spheroidizing the feed material within the plasma to form dehydrogenated and spheroidized titanium particles;
exposing the dehydrogenated and spheroidized particles to an inert gas; and
cooling and solidifying the dehydrogenated and spheroidized particles in the chamber having the inert gas, the dehydrogenated and spheroidized particles having more than 90% spheroidization consistency,
wherein the solidified dehydrogenated and spheroidized particles comprise spheroidized titanium powder particles having a martensitic microstructure; and
collecting the dehydrogenated and spheroidized particles.

11. The method of claim 10 , further comprising deoxidizing the feed material within the plasma.

12. The method of claim 10 , wherein the plasma exposes the feed material to a temperature profile between about 4,000 K and 8,000 K.

13. The method of claim 10 , further comprising exposing the feed material to a partial vacuum while the feed material is exposed to the plasma.

14. The method of claim 10 , further comprising exposing the feed material to a pressure higher than atmospheric pressure while the feed material is exposed to the plasma.

15. The method of claim 10 , further comprising: screening the feed material prior to introducing the feed material into the plasma torch; and maintaining an average particle size distribution from the feed material to the dehydrogenated and spheroidized particles.

16. The method of claim 15 , wherein the particle size of feed material is no less than 1.0 micrometers and no more than 300 micrometers.

17. The method of claim 10 , further comprising purging the hydride feed material with an inert gas to remove oxygen prior to introducing the hydride feed material into the plasma torch.

18. The method of claim 10 , wherein the plasma torch is a microwave generated plasma torch.

Assignees

• 6K Inc

Inventors

• Hadidi Kamal
• Wrobel Gregory
• Redjdal Makhlouf

Classifications

• B22F1/065

  Spherical particles · CPC title

• B22F1/00

  Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties · CPC title

• B22F2201/10

  Inert gases · CPC title

• B22F2998/10

  Processes characterised by the sequence of their steps · CPC title

• H01J37/32192

  Microwave generated discharge (H01J37/32357, H01J37/32366, H01J37/32394, H01J37/32403 take precedence) · CPC title