论文部分内容阅读
众所周知,可用产生柱状晶结构的方法浇铸合金,制造含有或不含铜和铌的铁—铝—镍—钴合金永磁体,这种结构在合金最后被磁化时,对磁各向异性提供最大好处。必须细心地调整合金成分,使在凝固时生长好的柱晶,而又不损害合金总的磁性能。早已指出:在这种合金中,钛的存在会增加矫顽力;并且可用铌代替部分钛,可是没有钛时铌并不能产生象有钛时所得到的那样高的矫顽力。然而,钛和铌对柱状晶的生长起
It is well known that alloys can be cast by methods that produce a columnar crystal structure to produce iron-aluminum-nickel-cobalt alloy permanent magnets, with or without copper and niobium, which provide the greatest magnetic anisotropy when the alloy is finally magnetized . The alloy composition must be carefully adjusted so that the columnar crystals grow well upon solidification without compromising the overall magnetic properties of the alloy. It has long been pointed out that in this alloy, the presence of titanium increases the coercivity; and niobium can be used in place of part of titanium, but in the absence of titanium, niobium does not produce the same high coercivity as titanium. However, the growth of columnar crystals from titanium and niobium