研究目的
Investigating the phase formation between Iridium thin films and zirconium carbide prepared by spark plasma sintering at relatively low temperatures.
研究成果
The study successfully investigated the phase and microstructure evolution of ZrC sintered at different temperatures and the interactions between Ir thin films and ZrC. The formation of Ir2Zr and IrZr phases at 600 °C and 800 °C respectively was observed, indicating potential for Ir as a protective layer for ZrC in nuclear applications.
研究不足
The study focuses on lower temperature range of 600 °C to 800 °C, which may not cover all potential interactions at higher temperatures relevant to nuclear reactor conditions.
1：Experimental Design and Method Selection:
ZrC samples were prepared by spark plasma sintering (SPS) at temperatures of 1700 °C, 1900 °C and 2100 °C at 50 MPa for 10 minutes. Iridium (Ir) thin films were deposited on ZrC ceramics by electron beam deposition method and annealed in vacuum at temperatures of 600 °C and 800 °C for 2h.
2：2h. Sample Selection and Data Sources:
2. Sample Selection and Data Sources: Zirconium (IV) carbide powder (mean particle size of 5μm and purity >99 %) from Sigma-Aldrich was used.
3：List of Experimental Equipment and Materials:
HHPD-25 from FCT Syteme GmbH Germany for SPS, Bruker D8 Advance XRD system, Zeiss Cross beam 540 FEG SEM.
4：Experimental Procedures and Operational Workflow:
The powders were prepared in a 20 mm inner diameter graphite die, cold pressed using a hydraulic press, and then spark plasma sintered. The samples were then cut into smaller pieces, polished, cleaned, and dried. Ir films were deposited by electron beam deposition at room temperature on the ZrC substrates.
5：Data Analysis Methods:
The phase composition was analyzed by X-ray diffraction analysis. The grain sizes were calculated from the XRD data using Sherrers’s equation. The microstructure was observed by scanning electron microscopy (SEM).
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