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Title: Atomization methods for forming magnet powders

Abstract

The invention encompasses methods of utilizing atomization, methods for forming magnet powders, methods for forming magnets, and methods for forming bonded magnets. The invention further encompasses methods for simulating atomization conditions. In one aspect, the invention includes an atomization method for forming a magnet powder comprising: a) forming a melt comprising R.sub.2.1 Q.sub.13.9 B.sub.1, Z and X, wherein R is a rare earth element; X is an element selected from the group consisting of carbon, nitrogen, oxygen and mixtures thereof; Q is an element selected from the group consisting of Fe, Co and mixtures thereof; and Z is an element selected from the group consisting of Ti, Zr, Hf and mixtures thereof; b) atomizing the melt to form generally spherical alloy powder granules having an internal structure comprising at least one of a substantially amorphous phase or a substantially nanocrystalline phase; and c) heat treating the alloy powder to increase an energy product of the alloy powder; after the heat treatment, the alloy powder comprising an energy product of at least 10 MGOe. In another aspect, the invention includes a magnet comprising R, Q, B, Z and X, wherein R is a rare earth element; X is an element selectedmore » from the group consisting of carbon, nitrogen, oxygen and mixtures thereof; Q is an element selected from the group consisting of Fe, Co and mixtures thereof; and Z is an element selected from the group consisting of Ti, Zr, Hf and mixtures thereof; the magnet comprising an internal structure comprising R.sub.2.1 Q.sub.13.9 B.sub.1.

Inventors:
 [1];  [1];  [1]
  1. Idaho Falls, ID
Issue Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
OSTI Identifier:
872844
Patent Number(s):
6022424
Assignee:
Lockheed Martin Idaho Technologies Company (Idaho Falls, ID)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER
C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
DOE Contract Number:  
AC07-94ID13223
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
atomization; methods; forming; magnet; powders; encompasses; utilizing; magnets; bonded; simulating; conditions; aspect; method; powder; comprising; melt; 13; z; rare; earth; element; selected; consisting; carbon; nitrogen; oxygen; mixtures; zr; hf; atomizing; form; spherical; alloy; granules; internal; structure; substantially; amorphous; phase; nanocrystalline; heat; treating; increase; energy; product; treatment; 10; mgoe; amorphous phase; powder comprising; alloy powder; rare earth; heat treatment; element selected; heat treating; crystalline phase; structure comprising; earth element; melt comprising; spherical alloy; substantially amorphous; energy product; utilizing atomization; forming magnet; encompasses methods; magnet powders; /148/75/

Citation Formats

Sellers, Charles H, Branagan, Daniel J, and Hyde, Timothy A. Atomization methods for forming magnet powders. United States: N. p., 2000. Web.
Sellers, Charles H, Branagan, Daniel J, & Hyde, Timothy A. Atomization methods for forming magnet powders. United States.
Sellers, Charles H, Branagan, Daniel J, and Hyde, Timothy A. Sat . "Atomization methods for forming magnet powders". United States. https://www.osti.gov/servlets/purl/872844.
@article{osti_872844,
title = {Atomization methods for forming magnet powders},
author = {Sellers, Charles H and Branagan, Daniel J and Hyde, Timothy A},
abstractNote = {The invention encompasses methods of utilizing atomization, methods for forming magnet powders, methods for forming magnets, and methods for forming bonded magnets. The invention further encompasses methods for simulating atomization conditions. In one aspect, the invention includes an atomization method for forming a magnet powder comprising: a) forming a melt comprising R.sub.2.1 Q.sub.13.9 B.sub.1, Z and X, wherein R is a rare earth element; X is an element selected from the group consisting of carbon, nitrogen, oxygen and mixtures thereof; Q is an element selected from the group consisting of Fe, Co and mixtures thereof; and Z is an element selected from the group consisting of Ti, Zr, Hf and mixtures thereof; b) atomizing the melt to form generally spherical alloy powder granules having an internal structure comprising at least one of a substantially amorphous phase or a substantially nanocrystalline phase; and c) heat treating the alloy powder to increase an energy product of the alloy powder; after the heat treatment, the alloy powder comprising an energy product of at least 10 MGOe. In another aspect, the invention includes a magnet comprising R, Q, B, Z and X, wherein R is a rare earth element; X is an element selected from the group consisting of carbon, nitrogen, oxygen and mixtures thereof; Q is an element selected from the group consisting of Fe, Co and mixtures thereof; and Z is an element selected from the group consisting of Ti, Zr, Hf and mixtures thereof; the magnet comprising an internal structure comprising R.sub.2.1 Q.sub.13.9 B.sub.1.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {1}
}

Works referenced in this record:

Developing rare earth permanent magnet alloys for gas atomization
journal, September 1996


Altering the cooling rate dependence of phase formation during rapid solidification in the Nd2Fe14B system
journal, April 1995