The paper presents the results of studies of the contact physicochemical interaction of a high-temperature nickel alloy with an investment casting shell material of Al₂O₃–Al₂O₃ composition. A comparative assessment of the quality of the surface layer of cast products obtained in conventional ceramic shells of the Al₂O₃–SiO₂ composition has been performed. It is found that, unlike the Al₂O₃–SiO₂ investment casting shell mold, the Al₂O₃–Al₂O₃ casting mold interacts with the melt to a much lesser extent. The introduction of non-metallic inclusions occurs to a depth of 10–20 μm (Al₂O₃–Al₂O₃ ceramic shell mold), which is noticeably lower than that of cast products obtained in the Al₂O₃–SiO₂ ceramic shell mold (up to 40–70 μm). The roughness value of the casting produced in the Al₂O₃–Al₂O₃ ceramic shell mold is 2.5–5.0 μm, and in conventional Al₂O₃–SiO₂ shells this value is 3.5–6.5 μm.

Graphic abstract

The process of interaction of a ceramic shell mold material of the Al₂O₃–Al₂O3 composition with a nickel-based superalloy was investigated.

中文翻译：

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Al 2 O 3 -Al 2 O 3组成的陶瓷铸造模具材料与镍基高温合金的相互作用

本文介绍了高温镍合金与Al ₂ O ₃ -Al ₂ O ₃成分熔模铸造壳材料的接触物理化学相互作用的研究结果。对由传统的Al ₂ O ₃ -SiO ₂组成的陶瓷壳制成的铸件表面层的质量进行了比较评估。发现与Al ₂ O ₃ -SiO ₂熔模铸造壳模不同，Al ₂ O ₃ -Al ₂ O ₃铸模与熔体的相互作用程度要小得多。引入非金属夹杂物的深度为10–20μm（Al ₂ O ₃ –Al ₂ O ₃陶瓷壳模），明显低于Al ₂ O ₃ –SiO _2中获得的铸造产品的引入。陶瓷壳模具（最大40–70μm）。在Al ₂ O ₃ -Al ₂ O ₃陶瓷壳模具中生产的铸件的粗糙度值为2.5-5.0μm ，而在常规的Al ₂ O ₃ -SiO ₂壳中，该粗糙度值为3.5-6.5μm。

图形摘要

研究了Al ₂ O ₃ -Al ₂ O3组成的陶瓷壳模具材料与镍基高温合金的相互作用过程。