AN ISOBAR-ISOTHERMAL PHASE DIAGRAM OF THE Nd-Fe-B SYSTEM AT ATMOSPHERIC PRESSURE AND 1000℃
来源期刊：Journal of Rare Earths1990年第3期
论文作者：郝士明 徐维
文章页码：200 - 205
摘 要：<正> An isothermal section of Nd-Fe-B system at 1000℃ and the phase equilibrium relationship in Fe-Ndand Nd-B binary systems were investigated with diffusion couple by means of metallographic observation,electron microprobe analysis and X-ray diffraction.It was shown that there are three stable ternary com-pounds,Nd2Fe14B,Nd2Fe7B6 and Nd9Fe3B8 in Nd-Fe-B system at 1000℃.None of these phases has solu-bility,that is,they are exactly stoichiometric phases.On the other hand,there exist rather wide two-phaseregions between Nd2Fe7B6 and liquid as well as between Nd9Fe3B8 and liquid.It was identified that there isno NdFe2 compound in the system under atmospheric pressure.
郝士明，徐维
摘 要：<正> An isothermal section of Nd-Fe-B system at 1000℃ and the phase equilibrium relationship in Fe-Ndand Nd-B binary systems were investigated with diffusion couple by means of metallographic observation,electron microprobe analysis and X-ray diffraction.It was shown that there are three stable ternary com-pounds,Nd2Fe14B,Nd2Fe7B6 and Nd9Fe3B8 in Nd-Fe-B system at 1000℃.None of these phases has solu-bility,that is,they are exactly stoichiometric phases.On the other hand,there exist rather wide two-phaseregions between Nd2Fe7B6 and liquid as well as between Nd9Fe3B8 and liquid.It was identified that there isno NdFe2 compound in the system under atmospheric pressure.
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