Amorphous Phase Formation in the Zirconium-Poor Corner of (Fe, Co, Ni)-Zr systems

The formation of amorphous phase was found in the limited region around 10 at% zirconium in (Fe, Co, Ni)-Zr systems. Their Vickers hardness and fracture strength were of the order of about 550-700 DPN and 1700-2100 MPa, respectively. They also were crystallized on heating at about 340-500℃ and remained ductile until the crystallization temperature

Magnetic Properties of Amorphous Fe-Zr-B Alloys

The formation range, magnetic properties and thermal stability for Fe-Zr-B amorphous alloys have been examined. The combination of zirconium and boron as glass formation elements is extremely effective both in expanding the formation range and increasing stability against crystallization for Fe-based amorphous alloys. Both the Curie temperature and saturation magnetization at room temperature decrease with increasing Zr content. Magnetostriction for the present alloys is smaller than that of metal-metalloid alloys possessing the same magnitude of saturation magnetization. There is no variation in coersive force on isothermal aging at 150℃ for time up to 10^4 minutes

CHARACTERISTICS OF (Fe, Co AND/OR Ni)-Zr AMORPHOUS ALLOYS

The present paper reviews the outline of our recent work on several interesting properties of (Fe, Co and/or Ni)-Zr amorphous alloys. The amorphous single phase was found in a limited composition range around 10 at% Zr in Fe-Zr, Co-Zr and Ni-Zr binary systems, in Fe-Co-Zr, Fe-Ni-Zr and Co-Ni-Zr ternary systems and in Fe-Co-Ni-Zr quaternary system. These metal-metal type amorphous alloys have a high thermal stability and good mechanical properties. The Fe-based alloys also exhibit excellent soft magnetic properties and invar behaviors