Preparation And Properties Of Ternary Fe-Zr-B Amorphous Alloys

Since last century 60 years when amorphous alloy materials has been reported for first time, a number of different amorphous alloys were prepared successfully. Excellent propertities showed in amorphous alloys has resaulted that the research of amorphous alloys which became a focus of materials reseaching in a quite short time. Fe based amorphous alloys have a good application prospect for high strength, high thermal stability, excellent soft magnetic and corrosion resistant properties.To obtain high glass forming ablity(GFA), high purity raw material and multicomponent have been used in most preparation of Fe based amorphous alloys, which increace the prepared costs and cause the complication of manufacturing process. In this paper, new components of ternary Fe-Zr-B amorphous alloys has been designed and prepared with methods of arc melting and single roller quenching spin with industrial grade purity raw materials. The glass forming ability, thermal stability, magnetic properties and mechanical properties of the amorphous alloys were investigated by means of X-ray diffractometry (XRD), differential scanning calorimetry (DSC) and vibrating sample magnetometer (VSM).Ternary Fe-Zr-B amorphous alloys with content of Fe 60-66% while content of B 10-22% has been designed and prepared for ribbon samples after analysis of existing theories.The amorphous alloys Fe64Zr17Bi9, Fe66Zr15B19, Fe62Zr16B22, Fe64ZrnB22 and Fe66Zr12B22 have been obtained for the first time. The Fe atoms concent of Fe62Zr16B22 amorphous alloy is only 62%, which is the lowest in reported papers.The structural analysis of ternary Fe-Zr-B amorphous alloys indicated that the precipitate of bccFe has been inhibitted by the addition of B atoms which enhanced glass forming ablity. In ternary Fe-Zr-B amorphous alloys system, main amorphous competitive phases are Fe3B, Fe2B, FeB and Fe3.5B. Amorphous competitive phase Fe3.5B has been reported in ternary Fe-Zr-B amorphous alloys system for the first time.The thermal results showed that the perpared ternary Fe-Zr-B amorphous alloys performed thermal stability. The thermal stability of Fe66Zr12B22 alloy is the best among all prepared amorphous alloys in this paper for which supercooled liquid regions is widest (?TX=73K).Corrosion resistance tests of Fe64Zr14B22 and Fe66Zr12B22 amorphous alloys were proccessed, the resault indicted that the EIS curve composed by a single capacitive loop, which means well-distributed corrosion products formed on the surface of amorphous sample. With Fe content increasing from 70.23% to 73.45% in amorphous alloys, the corrosion resistance of Fe66Zr12B22 amorphous alloy is better than that of Fe64Zr14B22 amorphous alloy.The magnetic properties of ternary Fe-Zr-B amorphous alloys have been obtained by vibrating sample magnetometer (VSM). The results show this sample have typical soft magnetic properties. The increase of B atoms improved saturation magnetization and magnetic permeability while the coercivity of amorphous enhanced, too. Saturation magnetization and magnetic permeability of amorphous imporved as Fe atoms are increased.