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利用X射线衍射分析、差热扫描热分析仪和纳米压痕仪研究退火保温时间对Ce69Al10Cu20Co1非晶热稳定性和力学性能的影响。结果表明:在低于玻璃转变温度以下长时间等温退火,材料仍保持非晶结构,随退火时间的延长,合金的自由体积和缺陷浓度逐渐减少,合金玻璃转化温度逐渐升高,而晶化温度逐渐降低。纳米压痕结果表明,铸态和弛豫态非晶合金在压痕保载曲线均出现明显的蠕变平台,随退火时间延长,由于形成更加致密的堆垛结构,蠕变平台宽度不断减小,而合金的模量和硬度均有提高。
The effects of annealing time on the thermal stability and mechanical properties of Ce69Al10Cu20Co1 amorphous alloy were investigated by X-ray diffraction (XRD), differential scanning calorimetry (DSC) and nanoindentation. The results show that the material remains amorphous when it is annealed at a temperature below the glass transition temperature for a long time, and the free volume and defect concentration of the alloy gradually decrease with the increase of annealing time. The crystallization temperature Gradually decreases. The results of nano-indentation show that the as-cast and relaxed amorphous alloys have obvious creep platform on the indentation retention curve. With the increase of annealing time, the width of the creep platform decreases due to the formation of denser stacking structure , While the alloy modulus and hardness have increased.