Spherical light metal based powder particles and process for producing same

• US 4,923,509 A
• Filed: 11/16/1987
• Issued: 05/08/1990
• Est. Priority Date: 09/08/1986
• Status: Expired due to Fees

• Current Assignee: GTE Products Corporation
• Original Assignee: GTE Products Corporation
• Inventors: Kemp, Preston B. Jr., Johnson, Walter A.
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Schumaker, David W.
• Application Number:
  US07/121,448
• Time in Patent Office: 904 Days
• Field of Search: 75/251-255, 75/0.5 B, 420/401, 420/402
• US Class Current: 420/401
• CPC Class Codes: B22F 1/065 Spherical particles

Abstract

A powdered material and a process for producing the material are disclosed. The powdered material consists essentially of light metal based spherical particles which are essentially free of elliptical shaped material and elongated particles having rounded ends. 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 directly solidified.

Claims

1. A powdered material consisting essentially of spherical particles of a light metal based material, wherein said light metal is selected from the group consisting of magnesium and beryllium, said powdered material being essentially free of elongated particles having rounded ends and having a particle size less than about 50 micrometers, said powdered material directly solidified from plasma melted material.

2. A powdered material of claim 1 wherein said light metal based material is an alloy selected from the group consisting of magnesium alloys, and beryllium alloys,

3. A powdered material of claim 1 wherein said light metal based material is a light metal with additives selected from the group consisting of oxides, oxides, nitrides, borides, carbides, silicides, carbonitrides, and mixtures thereof.

4. A powdered material of claim 1 wherein said light metal based material is a light metal alloy with additives selected from the group consisting of oxides, nitrides, borides, carbides, silicides, carbonitrides, and mixtures thereof.