【摘要】 采用动态差示扫描量热法（ Ｄ Ｓ Ｃ） 和 Ｘ 射线衍射法（ Ｘ Ｒ Ｄ） 研究了快淬 Ｎｄ Ｆｅ Ｂ合金的晶化行为。非晶态 Ｎｄ８ ．５ Ｆｅ８６ Ｂ５ ．５ 合晶化由三个过程组成，各转变有效晶化激活能分别为４ ．８ｅ Ｖ、１５ ．２ｅ Ｖ 和５ ．４ｅ Ｖ。非晶态 Ｎｄ７ ．５ Ｄｙ１ Ｆｅ８５ Ｂ４５ Ｇａ２ 合金直接由非晶态转变为α－ Ｆｅ和 Ｎｄ２ Ｆｅ１４ Ｂ 相，有效晶化激活能为５ ．８ｅ Ｖ。更多还原

【Abstract】 The crystallization behavior of melt spun NdFeB ribbons was investigated using dynamic differential scanning calorimetry(DSC) and X ray diffraction(XRD).The crystallization process of amorphous Nd 8.5 Fe 86 B 5.5 alloy takes place through three steps,the effective activation enery of three crystallization peaks is 4.8eV、15.2eV and 5.4eV.respectively.Amorphous Nd 7.5 D y1 Fe 85 B 45 Ga 2 alloy crystallized directly form amorphous to a mixture of α Fe and Nd 2 Fe 14 B phases,the effective crystallization activation energy of transformation is 5.8eV.更多还原