This paper describes an approach to escape from the classic strength-toughness trade-off in bulk ceramics using the dual composite architectural concept. The key questions addressed by the research were: can dual composite architectures be fabricated? -how do dual composite architectures affect the physical properties of ceramics? -do dual composite architectures affect the mechanical behavior of composites? -do dual composite architectures have increased damage tolerance at elevated temperatures? These questions were answered positively. Reinforcing granules dispersed in loose powder mixtures were hot-pressed to obtain fully dense dual composite architectures with target overall composition. Defined sub-composites (labeled granule and matrix) of similar compositions, but differing engineered microstructures, were successfully retained. The brittle-to-ductile transition of MoSi₂ above 1400 K enabled the simultaneous increase in both strength and toughness, and values of up to 440 MPa and 11.5 MPa√m, respectively, were experimentally determined at 1773 K.

本文介绍了一种使用双重复合结构概念摆脱块状陶瓷经典强度-韧性折衷的方法。该研究解决的关键问题是：是否可以制造双重复合结构？-双重复合结构如何影响陶瓷的物理性能？-双复合结构会影响复合材料的机械性能吗？-双复合结构在高温下是否具有更高的损伤容限？这些问题得到了肯定的回答。对分散在疏松粉末混合物中的增强颗粒进行热压，以获得具有目标总体组成的完全致密的双重复合结构。成功保留了相似组成，不同工程微观结构的确定的亚复合物（标记的颗粒和基质）。高于1400 K的₂可使强度和韧性同时增加，并且实验确定的最高值分别为440 MPa和11.5MPa√m。