Plasma sprayed samarium--cobalt permanent magnets
Samarium--cobalt permanent magnets were fabricated by arc plasma spraying. This process involves the injection of relatively coarse powder particles into a high-temperature gas for melting and spraying onto a substrate. The technique is being investigated as an economical method for fabricating cobalt--rare earth magnets for advanced traveling wave tubes and cross-field amplifiers. Plasma spraying permits deposition of material at high rates over large areas with optional direct bonding to the substrate, and offers the ability to fabricate magnets in a variety of shapes and sizes. Isotropic magnets were produced with high coercivity and good reproducibility in magnetic properties. Post-spray thermal treatments were used to enhance the magnetic properties of sprayed deposits. Samarium--cobalt magnets, sprayed from samarium-rich powder and subjected to post-spray heat treatment, displayed energy products in excess of 9 million gauss-oersteds and coercive forces of approximately 6000 oersteds. Bar magnet arrays were constructed by depositing magnets on ceramic substrates. (auth)
- Research Organization:
- Monsanto Research Corp., Dayton, OH
- NSA Number:
- NSA-33-003615
- OSTI ID:
- 4162303
- Journal Information:
- AIP (Am. Inst. Phys.) Conf. Proc., no. 24, pp. 689-690, Journal Name: AIP (Am. Inst. Phys.) Conf. Proc., no. 24, pp. 689-690; ISSN APCPC
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
*PERMANENT MAGNETS-- MAGNETIC PROPERTIES
*SAMARIUM ALLOYS-- MAGNETIC PROPERTIES
360104* --Materials--Metals & Alloys--Physical Properties
COERCIVE FORCE
N50230* --Metals
Ceramics
& Other Materials--Metals & Alloys--Properties
Structure & Phase Studies
PLASMA ARC SPRAYING