Abstract Synchrotron X-ray microtomography and ptychography were used to characterize the 3D network structure, morphology and distribution of metal carbides in an as-cast IN713LC Ni superalloy. MC typed carbides were found to distribute mainly on the grain boundary between the matrix γ and γ' phase. The differences in solidification cooling rate had a minor influence on the volume fraction of the MC type carbides, but significantly affected the carbide size, distribution and network morphology. Depending on the local composition of the remaining liquid phase and geometric constraints, the carbides can form either spherical or strip or network morphologies. The research demonstrated clearly the advantage and technical potential of using the two complementary tomography techniques synergistically to characterize non-destructively complex multiple-phase structures in three dimensional space with a spatial resolution of ~30 nm.

中文翻译：

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通过同步加速器 X 射线显微断层扫描和 ptychography 多尺度表征镍高温合金中金属碳化物的 3D 网络结构

摘要 同步加速器 X 射线显微断层扫描和 ptychography 被用来表征铸态 IN713LC 镍高温合金中金属碳化物的 3D 网络结构、形貌和分布。发现MC型碳化物主要分布在基体γ和γ'相之间的晶界上。凝固冷却速度的差异对MC型碳化物的体积分数影响较小，但对碳化物尺寸、分布和网络形态有显着影响。根据剩余液相的局部组成和几何限制，碳化物可以形成球形或条状或网络形态。