Thermal and elastic properties were measured for ceramics that contained as much as 96 wt% zeta phase tantalum carbide (ζ‐Ta₄C_3−x). The ceramics were produced from tantalum hydride that was milled to reduce particle size and then blended with carbon. Powders were reaction hot‐pressed at 1800°C for 2 hours under a flowing He environment, which resulted in ζ‐Ta₄C_3−x that was about 99% dense. The main secondary phases present in the reacted ceramic were TaC and Ta₂O₅. ζ‐Ta₄C_3−x had a thermal conductivity of 9.6 W/m·K and an electrical resistivity of 160 ± 4.2 μΩ‐cm, which are lower and higher than those of TaC, respectively. The Young's modulus was 379 ± 5 GPa and the hardness was 5.1 ± 0.7 GPa, which are also both lower than TaC. This study is the first to report the thermal properties and elastic moduli of high‐purity ζ‐Ta₄C_3−x.

中文翻译：

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ζ-Ta4C3-x的热性质和弹性常数

热和弹性性质的是，包含多达96重量％的ζ相碳化钽（ζ-TA陶瓷测量₄ Ç _{3- X}）。陶瓷由氢化钽制成，将其研磨以减小粒径，然后与碳混合。粉末是一个流动的He环境，这导致ζ-TA下反应热压在1800℃进行2小时₄ ç _{3- X}，这是约99％致密的。存在于反应的陶瓷中的主要第二相是TaC和Ta ₂ O ₅。ζ‐Ta ₄ C _{3− x}其导热系数为9.6 W / m·K，电阻率为160±4.2μΩ-cm，分别低于和高于TaC。杨氏模量为379±5 GPa，硬度为5.1±0.7 GPa，均低于TaC。这项研究是首次报道的热性能和高纯度ζ-TA弹性模量₄ Ç _{3- X}。