论文部分内容阅读
纳米材料是晶粒细化至1～100nm的材料,按空间维数可分为纳米粉、纳米纤维、纳米薄膜和块体纳米材料。纳米磁性材料的发现使材料磁性能发生了质的飞跃。软磁性能达到高磁导率、高磁感应强度和低矫顽力,而硬磁性能则达到最大磁能积、剩磁、矫顽力三者并高,最大磁能积更是翻了数倍。纳米粉和纳米薄膜在磁记录等领域应用潜力很大,而块体纳米磁性材料在微控制器、电机、变压器、磁头等领域有广泛应用前景。一、形成机理块体纳米磁性材料形成机理可分为两种,即非晶晶化与直接晶粒细化机理。非晶晶化形成纳米材料指先获得非
Nanomaterials are grain refinement to 1 ~ 100nm material, according to the space dimension can be divided into nano-powder, nano-fiber, nano-film and bulk nano-materials. The discovery of nanomaterials makes a qualitative leap in the magnetic properties of materials. Soft magnetic properties to achieve high permeability, high magnetic induction and low coercivity, and hard magnetic properties are reached maximum energy product, remanence and coercivity of the three and high, the maximum energy product is more than doubled. Nano-powders and nano-films have great potential applications in the fields of magnetic recording and the like, while bulk nano-magnetic materials have wide application prospect in the fields of microcontrollers, motors, transformers and heads. First, the formation mechanism Bulk nano magnetic material formation mechanism can be divided into two kinds, namely, amorphous crystallization and direct grain refinement mechanism. Amorphous crystallization of nanomaterials means that non-first