In this study we present a series of light-weight (6.24 to 6.42 g/cm³), Ti-rich Mo-Si-Ti alloys (≥40 at.% nominal Ti content) with the hitherto best combination of pesting and creep resistance at 800 and 1200 °C, respectively. This has been achieved by fine-scaled eutectic-eutectoid microstructures with substantial fractions of primarily solidified (Mo,Ti)₅Si₃. (Mo,Ti)₅Si₃ was found to be oxidation-resistant in these alloys and also beneficial for the creep resistance. The enhanced solidus temperature is of specific relevance with respect to the latter point. The creep resistance is competitive to the non-pesting resistant, but most creep-resistant (among the Mo-Si-Ti alloys) eutectoid alloy Mo-21Si-34Ti developed by Schliephake et al. [Schliephake et al., in Intermetallics 104 (2019) pp. 133–142]. Moreover, it is favourably superior to the commercially applied Ni-based single crystal alloy CMSX-4 for the applied compressive loading conditions under vacuum.

中文翻译：

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耐病虫害（Mo，Ti）5Si3共晶-共析Mo-Si-Ti合金的蠕变和氧化行为

在这项研究中，我们提出了一系列轻量级（6.24至6.42 g / cm ³），富钛的Mo-Si-Ti合金（标称Ti含量≥40at。％），并且迄今为止具有最佳的抗蠕变性和抗蠕变性分别在800和1200°C下进行。这是通过具有大量主要凝固的（Mo，Ti）₅ Si _3的小规模共晶-共析微结构实现的。（Mo，Ti）₅ Si ₃被发现在这些合金中具有抗氧化性，并且还具有抗蠕变性。固相线温度升高与后者有关。耐蠕变性与非抗蠕变竞争，但Schliephake等人开发的大多数抗蠕变（在Mo-Si-Ti合金中）共析合金Mo-21Si-34Ti。[Schliephake等人，金属间化合物104（2019），第133–142页]。此外，在真空下施加的压缩载荷条件下，它优于商业应用的镍基单晶合金CMSX-4。