Preparation and characterization of splat-cooled R--Co compounds

Conference · Wed Jan 01 04:00:00 EST 1975 · AIP (Am. Inst. Phys.) Conf. Proc., no. 24, pp. 687-688

OSTI ID:4200323

Ratnam, D V; Narashimhan, K S.V.L.; Giessen, B C

Rapidly quenched alloys of Sm--Co, Pr--Co, and MM--Co of the approximate composition RCo$sub 5$ were prepared by splat cooling droplets of the alloys in a modified arc furnace. X-ray diffraction analysis indicated a fine grained structure and also the possibility of some texture in the splat-cooled samples. Microscopic examination of the alloys in a light microscope revealed an equiaxed fine grained structure with a grain size of 2 to 5$mu$m. Magnetic measurements were performed on a vibrating sample magnetometer. Coercive force values were 5000 Oe for SmCo$sub 5$, 1500 Oe for PrCo$sub 5$, and 1250 Oe for MMCo$sub 5$. Thermomagnetic curves were obtained on the splat-cooled alloys by plotting magnetization versus temperature up to 900$sup 0$C. The data indicated that all the alloys were single phase with Curie points in fair agreement with published values for these compounds. Splat-cooled PrCo$sub 5$ was found to be unstable near its Curie temperature. (auth)

• Research Organization: Crucible Materials Research Center, Pittsburgh
• NSA Number: NSA-33-003614
• OSTI ID: 4200323
• Conference Information: Journal Name: AIP (Am. Inst. Phys.) Conf. Proc., no. 24, pp. 687-688
• Country of Publication: United States
• Language: English

Related Subjects

*MISCH METAL-- MAGNETIC PROPERTIES
*PRASEODYMIUM ALLOYS-- MAGNETIC PROPERTIES
*SAMARIUM ALLOYS-- MAGNETIC PROPERTIES
360104* --Materials--Metals & Alloys--Physical Properties
COERCIVE FORCE
CURIE POINT
INTERMETALLIC COMPOUNDS
N50230* --Metals
Ceramics
& Other Materials--Metals & Alloys--Properties
Structure & Phase Studies
SPLAT COOLING
THERMOMAGNETISM