Spherical titanium based powder particles
First Claim
1. A powdered material consisting essentially of spherical particles of a titanium base material, said powdered material being essentially free of elliptical shaped material and being essentially free of elongated particles, said powdered material having a particle size of less than about 50 micrometers and produced by the process comprising(a) mechanically reducing the size of a titanium based material to produce a finer powder;
- (b) entraining said finer powder in a carrier gas and passing said powder through a high temperature zone at a temperature above the melting point of said finer powder, said temperature being from about 5500°
C. to about 17,000°
C., said temperature being created by a plasma jet, to melt at least about 50% by weight of said finer powder to form essentially spherical particles of said melted portion and(c) rapidly and directly resolidifying the resulting high temperature treated material while said material is in flight.
0 Assignments
0 Petitions
Accused Products
Abstract
A powdered material and a process for producing the material are disclosed. The powdered material consists essentially of titanium based spherical particles which are essentially free of elliptical shaped material and elongated particles having rounded ends. The material has a particle size of less than about 50 micrometers. The process for making the spherical particles involves mechanically reducing the size of a starting material to produce a finer powder which is then entrained in a carrier gas and passed through a high temperature zone above the melting point of the finer powder to melt at least about 50% by weight of the powder and form spherical particles of the melted portion. The powder is then directly solidified.
-
Citations
1 Claim
-
1. A powdered material consisting essentially of spherical particles of a titanium base material, said powdered material being essentially free of elliptical shaped material and being essentially free of elongated particles, said powdered material having a particle size of less than about 50 micrometers and produced by the process comprising
(a) mechanically reducing the size of a titanium based material to produce a finer powder; -
(b) entraining said finer powder in a carrier gas and passing said powder through a high temperature zone at a temperature above the melting point of said finer powder, said temperature being from about 5500°
C. to about 17,000°
C., said temperature being created by a plasma jet, to melt at least about 50% by weight of said finer powder to form essentially spherical particles of said melted portion and(c) rapidly and directly resolidifying the resulting high temperature treated material while said material is in flight.
-
Specification
-
- Resources
-
Current AssigneeGTE Products Corporation (Ams-Osram AG)
-
Original AssigneeGTE Products Corporation (Ams-Osram AG)
-
InventorsJohnson, Walter A., Kemp, Preston B. Jr.
-
Primary Examiner(s)Sheehan, John P.
-
Assistant Examiner(s)Schumaker, David W.
-
Application NumberUS07/121,421Time in Patent Office981 DaysField of Search75/251-255US Class Current420/417CPC Class CodesB22F 1/065 Spherical particles
