快淬态纳米晶Fe-Cu-Ta-Si-B软磁金属薄带的制备

Preparation of As-quenched Nanocrystalline Fe-Cu-Ta-Si-B Soft Magnetic Ribbons

Fe-Cu-Ta-Si-B纳米晶金属薄带可以通过快淬技术直接制备,而无需退火过程。对比Fe-Cu-Ta-Si-B快淬纳米晶薄带,发现相同Cu含量下,α-Fe(Si)更易在Fe-Cu-Nb-Si-B快淬态薄带中析出。在快淬态Fe-Cu-Ta-Si-B金属薄带中,适当高的Cu含量有利于α-Fe(Si)的成核;但过高的Cu含量反而弱化了纳米晶化,这是由于团簇效应粗化了Cu颗粒的尺寸,却减少了α-Fe(Si)的有效成核位置。

Fe-Cu-Ta-Si-B nanocrystalline ribbons can be obtained by melt-spinning technique without annealing processes. At the same Cu content, α-Fe（Si） occurs more easily in as-quenched Fe-Cu-Nb-Si-B than in as-quenched Fe-Cu-Ta-Si-B. The appropriate Cu addition improves the nucleation of α-Fe（Si） in as-quenched Fe-Cu-Ta-Si-B ribbons. However, the excess Cu addition weakens the nano-crystallization, due to coarsening of the Cu clusters thus decreasing of the nucleation site for α-Fe（Si）.