Herein we present the amorphization, thermal stability, crystallization behavior, and mechanical properties of (Ni₆₀Nb₄₀)_100-x-ySi_xB_y (x = 0, 5 and 10 at.%, y = 0, 5 at.%) alloys with six distinct compositions. We investigated the influence of the nanocrystals formed by the addition of Si and B on the thermal stability and mechanical properties of the (Ni₆₀Nb₄₀)_100-x-ySi_xB_y (x = 0, 5 and 10 at.%, y = 0, 5 at.%) alloys. The phase and thermal stabilities of the alloys were studied using X-ray diffraction, high-resolution transmission electron microscopy, and differential scanning calorimetry and the mechanical properties were characterized by nanoindentation testing. It was found that single-step crystallization occurred in B-free alloys, whereas double step crystallization occurred in B-containing alloys. B-free (Ni₆₀Nb₄₀)₉₀Si₁₀ alloy exhibited the highest onset temperature of 714 °C, and B-containing (Ni₆₀Nb₄₀)₉₅B₅ alloy shows the lowest onset temperature at 642 °C. The microstructure of B-containing amorphous alloys consists of nano-sized metallic crystals with a size of less than 5 nm embedded in an amorphous phase. The existence of residual nanocrystals facilitates heterogeneous nucleation during crystallization of the amorphous phase, weakening the thermal stability of amorphous alloys. Crystallization of the amorphous phase remarkably enhances the mechanical properties of (Ni₆₀Nb₄₀)_100-x-ySi_xB_y (x = 0, 5 and 10 at.%, y = 0, 5 at.%) alloys, with a 40–60% increase in hardness and 19–88% increase in elastic modulus. An increase in mechanical properties after crystallization is lower in B-containing alloys because of the lower nano-intermetallic phases formation after crystallization, due to the presence of the residual nanocrystals.

在这里，我们介绍（Ni ₆₀ Nb ₄₀）_100-xy Si _x B _y（x = 0、5和10 at。％，y = 0、5 at。％）的非晶化，热稳定性，结晶行为和力学性能。具有六种不同成分的合金。我们研究了通过添加Si和B形成的纳米晶体对（Ni ₆₀ Nb ₄₀）_100-xy Si _x B _y的热稳定性和机械性能的影响。（x = 0、5和10 at。％，y = 0、5 at。％）合金。使用X射线衍射，高分辨率透射电子显微镜和差示扫描量热法研究了合金的相和热稳定性，并通过纳米压痕测试表征了机械性能。发现无硼合金中发生单步结晶，而含硼合金中发生双步结晶。无硼（Ni ₆₀ Nb ₄₀）₉₀ Si ₁₀合金的最高起始温度为714°C，而含硼（Ni ₆₀ Nb ₄₀）₉₅ B ₅合金的最低起始温度为642°C。含B非晶态合金的微观结构由埋在非晶态相中的小于5 nm的纳米级金属晶体组成。残余纳米晶体的存在促进了非晶相结晶过程中的异相形核，从而削弱了非晶态合金的热稳定性。非晶相的结晶显着增强了（Ni ₆₀ Nb ₄₀）_100-xy Si _x B _y的机械性能（x = 0、5和10 at。％，y = 0、5 at。％）合金，硬度增加40-60％，弹性模量增加19-88％。在含硼合金中，结晶后机械性能的增加较低，这是由于结晶后由于残留纳米晶体的存在而形成的纳米金属间相的含量较低。