【摘要】 采用SEM和XRD对Nd13Fe81.5B5.5合金氢化-歧化-脱氢过程中相结构和组织形貌的变化进行了观测分析,结果表明:非受热的Nd13Fe81.5B5.5合金的吸氢只能在富钕相的晶界上进行,吸氢的过程伴随着热量的释放。加热后的Nd13Fe81.5B5.5合金吸氢不仅沿着Nd13Fe81.5B5.5富钕相晶界进行,而且也能在其晶格内进行。合金吸氢后生成物主相为NdH2.9和α-Fe,还有微量的Fe2B和Fe2Nd,吸氢的过程伴随着大量热的释放,Nd13Fe81.5B5.5合金的吸氢温度为700℃,在730℃~800℃的范围内脱氢,在此工艺条件下,能获得高质量的氢化物。更多还原

【Abstract】 The alloy with chemical compositions of Nd13Fe81.5B5.5 has the function of hydrogen absorption in room temperature. When heated, its function of hydrogen absorbing is better. The results show that absorbing hydrogen for the nonheated Nd13Fe81.5B5.5 alloy occurs only in the crystal boundary of the rich Nd-phase accompanying the release of heat in process of absorbing hydrogen. When heated up, absorbing hydrogen for the alloy occurs not only in crystal boundary of rich Nd-phase but also in the crystal inner. After absorbing hydrogen, the main phases of the alloy are NdH2.9 and α-Fe with minor phases Fe2B and Fe2Nd accompanying the release of the mass heat. The hydrogen absorbing temperature for the alloy is 700℃. Dehydriding occurs in the range of 730℃~800℃. High quality of the hydride can be produced under the above-mentioned condition更多还原