Synthesis and Thermal Stability of New Ni-Based Bulk Glassy Alloy with Excellent Mechanical Properties

Abstract

The thermal stability, glass-forming ability (GFA) and mechanical properties of the Ni-Ta-Ti and Ni-Ta-Ti-Zr glassy alloys have been investigated. As the Ti content increases, the supercooled liquid region ÁT x ð¼ T x À T g Þ and reduced glass transition temperature (T g =T l ) of Ni 60 Ta 40Àx Ti x glassy alloys increase, showing maximum values of 63 K at 20%Ti and 0.59 at 25 at%Ti, respectively, and then gradually decrease. The addition of Zr to Ni-Ta-Ti alloys is effective for the increase in ÁT x and T g =T l . The maximum ÁT x and T g =T l values of 73 K and 0.60, respectively, are obtained for Ni 60 Ta 15 Ti 20 Zr 5 alloy. The Ni-Ta-Ti-Zr glassy alloys were formed in the rod form with diameters of over 1.0 mm by copper mold casting. The Ni-Ta-Ti-Zr bulk glassy alloys exhibit excellent mechanical properties, i.e., the compressive fracture strength ( c; f ) of 3180-3220 MPa and the compressive plastic elongation (" c;p ) of 0

H+-induced irradiation damage resistance in Fe- and Ni-based metallic glass

“…Fe-based metallic glass exhibits high glass transition temperature, good corrosion resistance, and low activation; Ni-based metallic glass has high glass-forming ability, high thermal stability, high strength, and excellent corrosion resistance. 8,9 The addition of corrosion-resistant element Ta further enhances the thermal stability and corrosion resistance of Ni-based metallic glass. 10 Therefore, studies on the H + irradiation-resistant properties of Fe-and Ni-based metallic glasses are of utmost importance to the selection of aerospace and nuclear fusion materials.…”