Search International and National Patent Collections
|1. (WO2018181592) PERMANENT MAGNET AND ROTATING MACHINE|
|Title:||PERMANENT MAGNET AND ROTATING MACHINE|
Provided are a permanent magnet having high coercive force and high squareness ratio among permanent magnets including Ce as an alternative element for Nd, and a rotating machine provided with the permanent magnet. The permanent magnet contains a rare-earth element R, a transition metal element T, and boron B, wherein: the rare-earth element R includes at least Nd, Y, and Ce; the transition metal element T includes at least Fe; a total content of the rare-earth element R in the permanent magnet is [R] at%; a total content of the transition metal element T in the permanent magnet is [T] at%; the content of B in the permanent magnet is [B] at%; the content of Y in the permanent magnet is [Y] at%; the content of Ce in the permanent magnet is [Ce] at%; [Y]/[R] is 0.05 to 0.25; [Ce]/[R] is 0.10 to 0.55; and [T]/[B] is 14 to 18.