Differences of element distribution between free and wheel side surface of NdFeB/alpha-Fe ribbons

作者：Zha Wusheng^*; Liu Jinyun; Song Tianxiu; Wang Zhengyun

来源：Journal of Rare Earths, 2011, 29(1): 94-96.

DOI：10.1016/S1002-0721(10)60408-5

• NdFeB/alpha-Fe alloy
• melt spin
• concentration segregation
• B-rich phase
• rare earths

The ribbons of NdFeB/alpha-Fe composite alloy were prepared by melt spinning and post crystallizing technique. The element distributions and phase component of both surfaces of as-spun ribbons were measured by energy dispersive spectrometry (EDS) and X-ray diffraction (XRD). Because of the centrifugation, a segregation of B, Fe, and Nd concentrations was observed at the cross section. After crystallizing annealing, the element concentration segregation still existed in the as-crystallized ribbons. Due to the segregation of B, Fe, and Nd, the B-rich phase was observed near the wheel side surface. The B-rich phase may deteriorate the magnetic property of NdFeB/alpha-Fe composite alloy.

• 出版日期2011-1
• 单位西华大学