Preparation and characterization of splat-cooled R-Co compounds

1 January 1975

proceedings article
Published by AIP Publishing in AIP Conference Proceedings

Vol. 24 (1) , 687-688
https://doi.org/10.1063/1.30238

Abstract

Rapidly quenched alloys of Sm‐Co, Pr‐Co and MM‐Co of the approximate composition RCo5 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 μm. Magnetic measurements were performed on a vibrating sample magnetometer. Coercive force values were 5000 Oe for SmCo5, 1500 Oe for PrCo5 and 1250 Oe for MMCo5. Thermomagnetic curves were obtained on the splat‐cooled alloys by plotting magnetization versus temperature up to 900C. The data indicated that all the alloys were single phase with Curie points in fair agreement with published values for these compounds. Splat‐cooled PrCo5 was found to be unstable near its Curie temperature.

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