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A selective liquid/solid displacement reaction has been used, for the first time, to convert non‐oxide ceramic solid solutions into composites comprised of intragranular metal nanoparticles embedded within non‐oxide ceramic microcrystals. The reaction of (ZrxW1−x)C microparticles with a Zr–Cu liquid at 1300°C resulted in the formation of W/ZrC microparticles with a core‐shell morphology. The internal microparticle core was comprised of W nanoparticles embedded within a single crystal ZrC matrix, whereas the W‐free shell was comprised of an epitaxial layer of ZrC. Such a selective liquid/solid reaction process may be used to generate a variety of intragranular metal/ceramic‐matrix composites.

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