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还原扩散法(R-D法)被用来生产Sm_2Co_17稀土类永磁材料,其组成为Sm(Co_0.67Fe_0.22Cu_0.10Zr_0.02)_7.2。这项研究的主要目的是得到最终合金产品的特定组成。为此,从初始物料中除去了铜粉,并在R-D反应后加入铜粉,锆是以氧化锆的形式加入的,氯化铵水溶液被用来浸出剩余的金属钙和氧化钙,后者是在R-D法的还原阶段形成的。随后还检测了:作为氧化剂的金属钙的数量,钴粉的粒度,R-D还原的温度和时间,在添加铜粉后合金的均匀化状况,在初始物料中氧化钐和氧化锆的多余量等等。在这项研究中所获得的磁体合金含有少量的钙及稍多一点的氧(与熔化金属原料简单制取的磁合金相比)。然而,当进行相同步骤的老成处理时,二者几乎都显示出相同的磁性。
Reduction diffusion method (R-D method) is used to produce Sm_2Co_17 rare earth permanent magnet material, which is composed of Sm (Co_0.67Fe_0.22Cu_0.10Zr_0.02) _7.2. The main purpose of this study is to get the specific composition of the final alloy product. For this purpose, copper powder is removed from the starting material and copper powder is added after the RD reaction, zirconium is added as zirconium oxide, and aqueous ammonium chloride is used to leach the remaining metallic calcium and calcium oxide, the latter being Formed in the reduction phase of the RD method. Subsequently, the amount of metallic calcium as oxidant, the particle size of cobalt powder, the temperature and time of RD reduction, the homogenization of the alloy after addition of copper powder, the amount of samarium oxide and zirconium oxide in the starting material, and the like were also examined . The magnet alloy obtained in this study contains a small amount of calcium and a little more oxygen (compared to a simple make of a molten alloy). However, when the same process of aging was performed, almost both of them showed the same magnetism.