Fe-79wt%Ni合金超细微粒的压力效应

• 作 者: 冯宜信 朱骏 陈允鸿
• 机 构: 扬州大学工学院物理系,扬州大学师范学院物理系
• 出 处: 功能材料
• 发表日期: 1997年06期
• 关键词: Fe-79wt%Ni合金 超细微粒 压力效应 比饱和磁化强度 复数磁导率 冷凝法 圆片 平均粒径 线性下降 张立德

用蒸发冷凝法制备了不同平均粒径的Ｆｅ７９ｗｔ％Ｎｉ合金超细微粒样品。在不同压强Ｐ下，将其压制成圆片及小圆环。随成形压强Ｐ增大，比饱和磁化强度σｓ明显增大，达最大值后，略有减少；矫顽力Ｈｃ呈线性下降。复数磁导率实部μ１及损耗正切ｔｇδ随Ｐ而变化。μ１及ｔｇδ的压力效应与平均粒径ｄ密切相关。

Different sizes of Fe79wt% Ni alloy ultrafine particles with different average particle size were prepared by evaporation condensation method. Under different pressure P, it is pressed into a wafer and a small ring. As the forming pressure P increases, the specific saturation magnetization σs obviously increases, reaching a maximum value, then decreases slightly; coercivity Hc decreases linearly. The real part of complex permeability μ1 and loss tangent tgδ with P changes. The pressure effect of μ1 and tgδ is closely related to the average particle size d.