测定了1373 K退火后的Fe-Cr-Al和Fe-Cr-Al-Si合金的交换积分、磁晶各向异性常数和饱和磁化强度,根据铁磁学基本原理计算了合金的畴壁能密度和体密度.经过对畴壁不可逆移动物理过程进行分析后认为,铁磁合金中畴壁不可逆移动造成的单位体积内弹性振动能的耗散在量值上等于畴壁能密度,即γw/δw=Eλ2s/2.这是铁磁合金中的一种磁弹转换效应.本实验研究的Fe-Cr-Al-Si(L),Fe-Cr-Si,Fe-Cr-Al以及Fe-Cr-2Al-Si合金的畴壁能密度依次提高,在1373 K以上温度充分退火并使晶粒充分长大的条件下,上述四种合金的内耗依次增大.
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