Gaowu QIN
金属学报(英文版)
doi:10.1016/S1006-7191(08)60117-9
Co-X(X=Cr, Mo, W) magnetic thin films were prepared by using DC magnetron sputtering, and their structures were examined by using X-ray diffraction (XRD). The amorphous forming ability (AFA) of the three alloy systems was discussed based on thermodynamic calculation and experiments. The results show that the Co-Mo thin films exhibit the largest AFA among them, and the Co-W thin films are condition-dependent amorphous while the Co-Cr thin films are hard to be amorphous, which is consistent with the thermodynamic calculation. The difference in AFA for the alloys of these three systems is finally ascribed to three main factors: differences in electronegativity, electron density and atomic size between Co and X elements.
关键词:
Amorphous forming ability
,
Co-Cr
,
Co-Mo
,
Co-W
王葛
,
鲍金锋
,
王兴华
,
陈玉鹤
,
周富伟
,
李强
材料研究学报
doi:10.11901/1005.3093.2015.417
研究了过渡金属元素(Zr,Nb,Mo)和Cu元素对Fe78Si9B13合金系非晶形成能力、热稳定性和磁性的影响;在Fe74Cu1Nb3Si13B9合金的基础上,通过逐步提高Fe含量,利用单辊甩带法制备Fe(76+x)Cu1Nb3Si(11-x)B9(X=0,2,4)和Fe(791-x)Cu1Nb2Si(6-x)B12(X=0,2,4)非晶/纳米晶合金薄带;利用XRD、DSC、TEM和VSM研究了高Fe含量Fe-Cu-Nb-Si-B系非晶/纳米晶合金的微观结构和磁性,并通过添加Nb元素优化了高Fe含量合金的磁性.研究结果表明:Zr和Nb元素的添加能明显提高Fe78Si9B13合金的非晶形成能力和热稳定性;高Fe含量的Fe-Cu-Nb-Si-B系纳米晶合金为典型的非晶/纳米晶双相结构,合金的饱和磁化强度Ms＞180 emu/g,且合金的矫顽力Hc在20e-9Oe之间,具有良好的软磁性能;Nb元素能显著细化Fe-Cu-Nb-Si-B系合金晶粒尺寸,从而能显著降低合金的矫顽力,改善合金的软磁性能;当Fe含量在80％-83％(原子百分比,下同)之间时,合金具有良好的软磁性能,但当Fe含量达到85％时,会有Fe2B、Fe3B相析出,从而显著恶化其软磁性能.
关键词:
金属材料
,
非晶/纳米晶合金
,
非晶形成能力
,
饱和磁化强度
,
矫顽力
