Fe - ni alloy fiber were first prepared in a mixed solution of ferrous and nickelous salts , using kbh4 as a reducing agent . conditions , such as quantity of naoh , concentration of salts , and species of surfactants , of preparation of fe - ni alloy were studied . the result show that fe - ni alloy were soft magnetic materials and they exhibited superparamagnetization at room temperature that have been widely used in industry 本文用液相还原法首次制备出纤维状的fe - ni合金、球形的fe - co 、 co - ni合金、 fe - co - ni合金粉体材料，并对其性能进行了分析和测试，结果表明：这些合金粒径小，比饱和磁化强度较大，矫顽力为零，呈现超顺磁性，是非晶态的软磁材料。
2.
Liberation of hydrogen gas would be increased rapidly and sic particles on the surface might be dispersed if the current density exceed the upper limit . furthermore , nickelous hydroxide would be deposited because the ph of plating solution nearby the surface rapidly increased . all of above might result in coating deterioration 若电流密度过大，超过所允许的上限值，会析出大量的氢气，可能冲散表面覆盖的sic微粒，而且易使磨头表面镀液ph值急剧上升而形成氢氧化镍沉淀，导致镀层质量恶化。
