论文标题
严重塑性变形的磁性稀释
Magnetic dilution by severe plastic deformation
论文作者
论文摘要
Fe和Cu粉末的混合物被冷压缩，随后通过高压扭转而造成严重的塑性变形，从而导致大量样品。使用鱿鱼磁化测定法研究了Cu基质中Fe稀释的稀释，而磁性的变化是Fe含量从沮丧的态度到热激活行为的函数。磁性特性与微结构相关，该微结构通过同步加速器X射线衍射和原子探针断层扫描研究。退火的AS染色状态导致固定和晶粒的生长，其牢固性是退火温度遵守随机各向异性模型的函数。提出的结果表明，高压扭转是一种能够在原子长度尺度上影响微观结构的技术。
Mixtures of Fe and Cu powders are cold-compacted and subsequently deformed with severe plastic deformation by high-pressure torsion, leading to bulk samples. The dilution of Fe in the Cu matrix is investigated with SQUID-magnetometry, whereas the magnetic properties change as a function of Fe-content from a frustrated regime to a thermal activated behaviour. The magnetic properties are correlated with the microstructure, investigated by synchrotron X-ray diffraction and atom probe tomography. Annealing of the as-deformed states leads to demixing and grain growth, with the coercivity as a function of annealing temperature obeying the random anisotropy model. The presented results show that high-pressure torsion is a technique capable to affect the microstructure even on atomic length scales.
