熔铸Nd-Fe-B合金氢化行为的研究  

Hydrogenation of the Cast Alloy Nd Fe B

作　　者：石永金[1] 易毅刚[1] 

机构地区：[1]西北有色金属研究院

出　　处：《稀有金属材料与工程》1999年第1期53-55,共3页Rare Metal Materials and Engineering

摘　　要：用ＸＲＤ和ＳＥＭ研究了在真空中频感应炉中熔制的Ｎｄ１３Ｆｅ８１．５Ｂ５．５合金在受热和非受热条件下的吸氢特点、吸氢产物的相组成和微结构，结果表明，该合金吸氢产物主相为ＮｄＨ２．９和αＦｅ，并有微量Ｆｅ２Ｂ和Ｆｅ２Ｎｄ。非受热吸氢合金中，ＮｄＨ２．９在富钕的晶界上形成；受热吸氢合金则在晶界和晶粒内部都可形成ＮｄＨ２．９。实验得出：７７０℃下吸氢３ｈ可获得高质量钕的氢化物。The hydrogenation characteristics of unheated and heated Nd 13 Fe 81 5 B 5 5 alloys melted in a vacuum mid frequency induction furnace, and the phase compositions and microstructures of the hydrogenated products have been investigated using XRD and SEM. It is found that the main in the hydride phases are NdH 2 9 , α Fe, and trace Fe 2B and Fe 2Nd. The NdH 2 9 phase forms only in the Nd rich boundaries of the unheated alloy, and heated alloy the NdH 2 9 phase is also present within the grains. High grade hydride can be attained if hydrogenated Nd Fe B at 770℃ for 3h.

关 键 词：Nd13Fe81.5B5.5 氢化行为 NdH2.9 熔铸 永磁材料 

分 类 号：TM273[一般工业技术—材料科学与工程]