Fe－29wt％Ni合金超细微粒的压力效应  

PRESSURE EFFECT OF Fe-29wt% Ni ALLOY ULTRAFINE PARTICLES

作　　者：陈允鸿[1] 陈庆琉 邓桂昌 陆怀先[1] 都有为 

机构地区：[1]扬州大学师范学院,南京大学

出　　处：《应用科学学报》1996年第4期427-431,共5页Journal of Applied Sciences

摘　　要：利用蒸发冷凝法，制备了不同平均粒径的Ｆｅ－２９ｗｔ％Ｎｉ合金超细微粒．在不同压强下，将超细微粒压制成片和小圆环．随压强增大，马氏体体积分数和比饱和磁化强度σｓ明显增大，而矫顽力Ｈｏ呈线性下降．复数磁导率随压强变化而变化，其高频特性远优于块材料．压力效应与平均粒径ｄ大小密切相关．Fe-29wt% Ni alloy ultrafine particles with different average sizesare prepared using the evaporation-condensation method. Under differentpressures, the ultrafine particles are compressed into round small rings.As the pressure increases, medensitic volume fraction and apecific satllrationmagnetization,σs, exhibit amarked increase,whereas corecivity, Hc shows alinear decline. The complex permeability varies with the Pressure. Its highfrequency e￣cteris'ic is much superior to that of alle bulk.There is a closerelationship between for pressure effect and the average size, d.

关 键 词：超细微粒 压力效应 铁镍合金 马氏体转变 

分 类 号：TG141[一般工业技术—材料科学与工程]