Pt accelerated coarsening of A15 precipitates in Cr-Si alloys

Anke S. Ulrich,Alexander J. Knowles,Valentina Cantatore,Ayan Bhowmik,Michael T. Wharmby,Christine Geers,Itai Panas,Mathias C. Galetz

Materials & Design（2022）

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摘要

•Pt enhances coarsening of A15 precipitates in Cr-rich Cr-Si-alloys.•A ternary Cr-rich Cr-Si-Pt phase diagram at 1200°C is proposed.•Pt causes Crss/A15 interface distortion A rim of enhanced Pt concentration destabilizes the Pt-containing A15 precipitates.•The coarsening mechanism differs between Pt-rich and Pt-lean precipitates.

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关键词

High temperature materials,Transition-metal silicides,Coarsening mechanism,Orientation relationship,Density functional theory

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