Nb含量对Fe40 Co40 Zr10-x Nbx B10（x=0，2，4，6，8，10）系合金非晶形成能力和微观结构的影响

摘要

Fe40Co40Zr10-xNbxB10(x=0,2,4,6,8,10)alloy strips were prepared by single roller melt-spinning method. The amorphous formation ability and microscopic structure of the samples were investigated by X-ray diffraction( XRD)and Scanning electron microscope( SEM). The results show that with increas-ing Nb content,amorphous forming ability decreases. When Nb content is 0,2at%,4at% and 6at%, the cross section of samples is complex which is ductile rupture. When Nb content is 8at% and 10at%, the cross section of the samples is smooth which is brittle rupture.%采用单辊快淬法制备Fe40Co40Zr10-xNbxB10（x=0，2，4，6，8，10）合金薄带。利用X射线衍射仪（XRD）和扫描电镜（SEM）研究Fe40Co40Zr10-xNbxB10（x=0，2，4，6，8，10）合金的非晶形成能力和微观结构。结果表明：Nb含量的增加降低了合金的非晶形成能力。未添加Nb和添加Nb含量为2 at％、4 at％、6 at％时表面断裂时形貌比较复杂，为韧性断裂；当合金添加Nb含量为8at％、10at％时样品横断面的（SEM）表面比较光滑，为脆性断裂。