研究了SPS温度对球磨熔体快淬Fe7oCr8Mo2Si5B15粉末以及MA Fe73.5Cu1Nb3Si13.5B9和Fe8oCo4Nb7B9纳米晶粉末的烧结块体合金组织结构与磁性能的影响.结果表明:(1)在30MPa/5min条件下,块体合金相对密度随着烧结温度的升高而增加,当烧结温度为1000℃时,Fe70Cr8Mo2Si5B15合金相对密度已达99%以上,当烧结温度进一步升高至1050℃后,Fe73.5Cu1Nb3Si13.5B9和Fe8oCo4Nb7B9合金相对密度也达到99%;(2)烧结块体合金的主要组成相为α-Fe相,尚存在少量的第二相金属间化合物,这些块体合金α-Fe相的晶粒尺寸均处于纳米级范围内,以Fe7oCr8Mo2Si5B15块体合金的晶粒尺寸为最小,其平均晶粒尺寸约50nm;(3)随着烧结温度的升高,这些块体合金的饱和磁感应强度Bs增大,矫顽力Hc随之降低,以Fe70Cr8Mo2Si5B15块体合金的矫顽力Hc(4.1kA·m-1)最低.
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