ABSTRACT The high-temperature thermal properties of powder metallurgy derived superalloys have not been reported in the literature. In this study, the coefficient of thermal expansion (CTE), specific heat and thermal diffusivity of metal injection moulded (MIM) Inconel 625 and Inconel 718 were measured. Measurements of wrought Nickel 200 were also made to verify the methods. These thermal property measurements were made in the range of room temperature to 1000–1200°C using dilatometry, differential scanning calorimetry and laser flash analysis. Thermal conductivity of all three materials was calculated using the measured diffusivity, specific heat and CTE. All the MIM results were compared to published data for the wrought form of these alloys and found to be in close agreement outside of phase transition regions.

中文翻译：

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使用组合热分析技术测量金属注射成型的 Inconel 625 和 Inconel 718 的热性能

摘要 粉末冶金衍生的高温合金的高温热性能尚未见文献报道。在这项研究中，测量了金属注射成型 (MIM) Inconel 625 和 Inconel 718 的热膨胀系数 (CTE)、比热和热扩散率。还对锻造镍 200 进行了测量以验证这些方法。这些热性能测量是在室温至 1000-1200°C 范围内使用膨胀法、差示扫描量热法和激光闪光分析进行的。使用测量的扩散率、比热和 CTE 计算所有三种材料的热导率。所有 MIM 结果都与这些合金锻造形式的公布数据进行了比较，发现在相变区域之外非常一致。