Abstract The aim of this work was to investigate the effects of moderate vacuum conditions (10 Pa, 1 × 103 Pa and 2 × 104 Pa) on glass forming ability, thermal stability and aging behavior of Co42Cu1Fe20Ta5:5B26:5Si5 amorphous samples in terms of size and distribution of crystalline precipitates. The thinnest parts (300 μm) of the wedge-shaped samples were amorphous for all vacuum conditions, and they had similar compositional, structural and thermal characteristics. However, they represented different microstructural features after heat treatments at 950 K and 1100 K. The same phases precipitated in all samples but the amount and the size of the precipitates increased as the pressure was raised to the normal atmospheric value. The differences in the glass forming ability and the microstructure due to aging are considered to originate from lower thermal characteristics, such as relaxation and reduced glass temperature as well as γ parameter, resulting from the poor vacuum pressure used in the production process. The differences in the microstructures and hardness values caused by heat treatments have been observed.

中文翻译：

---

真空条件对钴基非晶合金稳定性和结晶的影响

摘要 本工作的目的是研究中等真空条件（10 Pa、1 × 103 Pa 和 2 × 104 Pa）对 Co42Cu1Fe20Ta5:5B26:5Si5 非晶样品的玻璃形成能力、热稳定性和老化行为的影响。结晶析出物的大小和分布。楔形样品的最薄部分 (300 μm) 在所有真空条件下都是无定形的，它们具有相似的成分、结构和热特性。然而，它们在 950 K 和 1100 K 热处理后表现出不同的微观结构特征。所有样品中都析出相同的相，但随着压力升高到正常大气压值，析出物的数量和尺寸增加。老化导致的玻璃成形能力和微观结构的差异被认为源于较低的热特性，例如松弛和降低的玻璃温度以及 γ 参数，这是由于生产过程中使用的真空压力差造成的。已经观察到由热处理引起的显微组织和硬度值的差异。