Abstract
Permanent magnet alloys in the CrCoFe family and containing 5–25 wt. % Co and 18–31 wt. % Cr have been prepared by a variety of powder metallurgical techniques. Dense (relative density generally greater than 95%) samples of these alloys were prepared by solid-state or liquid-phase sintering of elemental or prealloyed powder compacts, followed by magnetic-field aging to develop magnetic properties. The residual porosity in the alloys gave rise to lower flux density and maximum energy product as compared to cast alloys; however, the coercive force is generally higher. By maximizing alloy density, excellent magnetic properties may be obtained: 5Co-31Cr-64Fe, Br = 12.3 kG, Hc = 500 Oe, (BH)max = 4.4 MG Oe; 12Co-25Cr-63Fe, Br = 14.0 kG, Hc = 551 Oe, (BH)max = 5.2 MG Oe; 25Co-29.5Cr-3Mo-42.5Fe, Br = 11.1 kG, Hc = 782 Oe, (BH)max = 4.4 MG Oe.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
