High-temperature magnetization and bulk magnetostriction investigation of Ti and Nb addition to Fe70Co30 alloy
Source abstract
Abstract
Lowering the Co content of the equiatomic Fe–Co alloys is of economic interest. The greatest interest is the application on electric motors, since the high-saturation magnetization level provides higher torques. In the present work, Fe70Co30 alloys with the addition of Ti and Nb were studied to improve magnetic properties. The alloys (Fe0.7Co0.3)97Ti3, (Fe0.7Co0.3)99Nb1, and (Fe0.7Co0.3)96Ti3Nb1 were produced, and the effects of Ti and Nb addition on the Fe70Co30 alloy microstructure and magnetic properties were studied. The addition of 1% of Nb + 3% of Ti to the Fe70Co30 alloy reduced most of the saturation magnetization polarization (from 2.34 to 2.14 T at 300 K), but the saturation magnetic polarization Ps is almost the same of pure Fe, although the Curie temperature is 195 K higher. The addition of only Ti or only Nb resulted in Ps even higher than 2.14 T and (Fe0.7Co0.3)99Nb1 presents the highest Ps. The quaternary alloy has the lowest value of Hc = 362 A m−1 and λs = 54 × 10−6, though the (Fe0.7Co0.3)99Nb1 has the highest Hc = 1790 A m−1, the highest Ps = 2.23 T, and the lowest saturation magnetostriction λs = 42.7 × 10−6. The alloy’s spin wave stiffnesses were determined from saturation magnetization versus temperature curves.
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Research context
OpenAlex topics: Magnetic Properties and Applications · Magnetic Properties of Alloys · Magnetic properties of thin films
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (28)
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