| 摘要 |
The present invention provides high corrosion resistant sintered NdFeB magnets and preparation process thereof. The composition of said magnets by mass% is Nd x R xl Fe 100-(x + xl + y + yl + z) T y M yl B z , wherein 24 ‰¤ x ‰¤ 33, 0 ‰¤ x1 ‰¤ 15, 1.43 ‰¤ y ‰¤ 16.43, 0.1 ‰¤ yl ‰¤ 0.6, 0.91 ‰¤ z ‰¤ 1.07, R is one or more selected from the group consisting of Dy, Tb, Pr, Ce and Gd, T is one or more selected from the group consisting of Co, Cu and Al, M is one or more selected from the group consisting of Nb, Zr, Ti, Cr and Mo, and M is distributed within the grain boundary phase of the NdFeB magnets. |
