Unique properties of MoSi₂ open new opportunities for preparing bulk polymer‐derived ceramics (PDCs) displaying favorable structural‐functional capabilities. Herein, an ingenious production route via re‐pyrolysis process of ball‐milling‐induced rigid SiC(rGO, xMoSi₂)_p fillers/flexible polycarbosilane‐vinyltriethoxysilane‐graphene oxide (PCS‐VTES‐GO, PVG) precursors blends is proposed to obtain in situ formed SiC(rGO, xMoSi₂) bulk PDCs. Interestingly, the possible dense β‐SiC/SiOxCy/C_free(rGO, xMoSi₂) framework suffers load and tiny microsized pores relaxes stress, which is beneficial to providing optimized hardness and fracture toughness, ceramic yield, and linear shrinkage. Attractively, MoSi₂ prominently enhances thermal and electrical conductivities of the products owing to increased continuity and compactness. To the best of our knowledge, lightweight SiC(rGO, 20%MoSi₂) bulk PDCs own brilliant ceramic yield (92.13%), liner shrinkage (6.69%), hardness (10.34 GPa), fracture toughness (4.35 Mpa·m^1/2), and thermal conductivity (8.57 W·m^–1·K^–1), opening potential emerging uses in aerospace fields.

中文翻译：

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通过聚合前体路线制造轻质SiC（rGO，xMoSi2）块状陶瓷

MoSi _2的独特性能为制备具有良好结构功能能力的大块聚合物衍生陶瓷（PDC）提供了新的机遇。在此，提出了一种通过球磨诱导的刚性SiC（rGO，x MoSi ₂）_p填料/柔性聚碳硅烷-乙烯基三乙氧基硅烷-氧化石墨烯（PCS-VTES-GO，PVG）前体混合物的再热解工艺的巧妙生产途径，以期获得原位形成的SiC（rGO，x MoSi ₂）块状PDC。有趣的是，可能的致密β-SiC/ SiO x C y / C_游离态（rGO，x MoSi ₂）框架承受载荷，微小的细孔缓解了应力，这有利于提供最佳的硬度和断裂韧性，陶瓷屈服强度和线性收缩率。有吸引力的是，由于提高了连续性和致密性，MoSi ₂显着提高了产品的导热性和导电性。据我们所知，轻质SiC（rGO，20％MoSi ₂）块状PDC具有出色的陶瓷产率（92.13％），衬里收缩率（6.69％），硬度（10.34 GPa），断裂韧性（4.35 Mpa·m ^{1 / 2}）和导热系数（8.57 W·m ^–1 ·K ^–1），为航空航天领域打开了新兴的应用前景。