ABSTRACT

Bulk metallic glass (BMG) samples are amalgamated by high-energy ball milling using the general formula (Ni₇₅Cr₁₅Si₁₀)_100−xTi_x (labelled as NCST_x, where x = 0,4, 8 and 12 at.%). The crystallinity and phase attribution properties of nickel (Ni), chromium (Cr), silicon (Si) and titanium (Ti) are scrutinized using the XRD analysis. The trend related to glass-forming ability (ΔT) and the GFA parameter (γ) is NCST₈ > NCST₁₂ > NCST₄ > NCST₀, which confirms that NCST₈ sample shows superior glass-forming ability. The reduced glass transition temperature (T_rg) for all the present BMG systems is greater than 0.5, which offers its good thermal stability and glass-forming ability (GFA). Corrosion studies suggested that a sample, having dynamic nature towards corrosion resistance and potential (E_c) (NCST₈, (Ni₇₅Cr₁₅Si₁₀)₉₂Ti₈), exhibits relatively lower values of both i_c (4.7 × 10⁻⁴ A/cm²) and i_p (0.0079 A/cm²), as recommended in potentio-dynamic findings.

摘要

块状金属玻璃 (BMG) 样品通过高能球磨使用通式 (Ni ₇₅ Cr ₁₅ Si ₁₀ ) _{100- x} Ti _x（标记为 NCST _x，其中x  = 0,4、8和 12 at。 %）。使用 XRD 分析来仔细检查镍 (Ni)、铬 (Cr)、硅 (Si) 和钛 (Ti) 的结晶度和相属性。与玻璃形成能力 (Δ T ) 和 GFA 参数 ( γ )相关的趋势是 NCST ₈  > NCST ₁₂  > NCST ₄  > NCST ₀，这证实了 NCST ₈样品显示出优异的玻璃成型能力。所有现有 BMG 系统的降低玻璃化转变温度 ( T _rg ) 均大于 0.5，这提供了其良好的热稳定性和玻璃形成能力 (GFA)。腐蚀研究表明，具有耐腐蚀性和电位 ( E _c ) (NCST ₈ , (Ni ₇₅ Cr ₁₅ Si ₁₀ ) ₉₂ Ti ₈ ) 的动态特性的样品显示出相对较低的i _c (4.7 × 10 ^-4  A/cm ² ) 和i _p (0.0079 A/cm ²)，正如电位动力学研究结果中所建议的那样。