Catching the Ni-based ternary metallic glasses with critical diameter up to 3 mm in Ni–Nb–Zr system

Structural origin of the pinpoint-composition effect on the glass-forming ability in the NiNb alloy system

“…The NiNb binary alloy system was selected as the research prototype because it has: (i) a broad composition region forming MG ribbons 26 ; (ii) an identified pinpoint composition (Ni 62 Nb 38 ) having relatively high GFA 9 ; (iii) a relatively simple system, guaranteeing the reliability in structural research; (iv) some corresponding multicomponent alloys possessing high GFA and unique properties, such as NiNbZr. 21 Ni x Nb 100Àx (x 5 60, 61, 62, 63, and 64 at.%) alloys were selected and studied, whose identified GFAs are shown in Table I. In the present work, it reveals that the atomic-level packing efficiencies and the regularity of cluster-level local structures are the short-range structural features significantly contributing to the GFA in MGs.…”

“…[13][14][15][16] Further more, studying the binary MGs may enhance our understanding of the formation of their corresponding multicomponent MGs. [17][18][19][20][21] An interesting phenomenon was found that although these binary systems have the broad composition regions forming MG, the best glass formers are located at some pinpoint compositions. 8,9 The existing rules and criteria fail to explain this phenomenon, resulting in the absence of the guiding principle for developing more MG compositions with high GFA in binary alloy systems.…”

Effect of Sn on microwave-induced heating and sintering of Ni-based metallic glassy alloy powders

“…The combination of superior properties suggests that Ni-based BMGs could be used as engineering materials. Recently, Ni-based BMG rods with diameters up to 2-5 mm have been produced using a Cu mold casting technique in various Ni-based metal-metal alloy systems [2][3][4][5][6][7]. However, the critical diameter of Ni-based BMGs obtained is much smaller compared to Zr-, Pd-, and Cu-based BMGs with critical diameters of over 20 mm.…”

Ni-Nb-Sn Bulk Metallic Glass Matrix Composites Fabricated by Microwave-Induced Sintering Process

“…[13][14][15][16][17][18] The Ni-based bulk metallic glasses (BMGs) exhibit high thermal stability, ultrahigh strength, and excellent corrosion resistance. [19] Recently, Ni-based BMG rods with diameters up to 2 to 5 mm in various Ni-based metal-metal alloy systems were produced using a Cu mold casting technique; [20][21][22][23] those with a diameter of 15 mm in the metal-metalloid Ni-Pd-P-B alloy system were prepared by a water quenching technique along with flux treatment. [24] However, the critical diameter of Ni-based BMGs obtained is much smaller compared to Zr-, Pd-, and Cu-based BMGs with critical diameters of over 20 mm.…”