Performance of Permanent Magnets at Elevated Temperatures

Abstract

The objective of this investigation was to determine the effect of temperature up to 600°C and vibration on the performance of Alnico V and Alnico VI magnets. Data is presented on the effect of cycling stability, coefficient of remanence, extended exposure to elevated temperature and vibration. The results of this investigation show that the use of Alnico V and Alnico VI in most instrument and control applications is feasible up to 500°C. However, a considerable loss in properties should be expected if the temperature exceeds 500°C.