Grain boundary wetting in the NdFeB-based hard magnetic alloys

作者：Straumal B B^*; Kucheev Yu O; Yatskovskaya I L; Mogilnikova I V; Schuetz G; Nekrasov A N; Baretzky B

来源：Journal of Materials Science, 2012, 47(24): 8352-8359.

DOI：10.1007/s10853-012-6618-5

Since the end of 1980s, NdFeB-based hard magnetic alloys have been the materials with the highest available magnetic performance. NdFeB-based magnets are produced either by liquid-phase sintering or by melt spinning. In the present investigation, NdFeB alloys quenched after annealing in the semi-liquid state are used to study the wetting of Nd2Fe14B grain boundaries by a Nd-rich liquid phase. It is shown that a transition from partial wetting to complete wetting occurs with increasing temperature. The results are compared with the data in the literature for NdFeB-based alloys processed by liquid-phase sintering. The relation between wetting properties and magnetic performance of these alloys is also discussed.

• 出版日期2012-12