Preparation of the Coating on the C/C–SiC Composite from the Mo–HfSi₂–SiB₄ Composition by the In Situ Reaction Synthesis

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2024年3月1日

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A. N. Astapov,
E. S. Belokopytova,
A. I. Matulyak,
V. A. Pogodin,
I. V. Soldatenko

摘要

Abstract

The coating based on the MoSi₂–MoB–HfB₂ system on the substrate of the C/C–SiC composite is prepared by the in situ reaction synthesis using the slurry-roasting deposition of the powder composition at 1620°C under an argon expansion pressure of ~1 Pa. The reaction mechanisms in the Mo–HfSi₂–SiB₄–C system predetermining the synthesis of secondary phases MoSi₂, MoB, HfB₂, and HfC are proposed. Thermodynamic calculations of possible chemical reactions are performed. Probable causes for a high porosity of the prepared coating are analyzed.

Preparation of the Coating on the C/C–SiC Composite from the Mo–HfSi2–SiB4 Composition by the In Situ Reaction Synthesis

摘要

Preparation of the Coating on the C/C–SiC Composite from the Mo–HfSi₂–SiB₄ Composition by the In Situ Reaction Synthesis