To produce mechanical reinforcement of a Cu matrix without any loss of conductivity for low temperature applications, it is proposed to replace classical alumina particles by superconducting particles. This paper describes a first attempt to synthesize copper composites containing 5 wt % YBaCuO and 20 wt % YBaCuO by using a powder processing route. The resulting mechanical and electrical properties are related comparatively to usual ODS Cu alloys. It is shown that a crucial difficulty remaining to be cleared up is the decomposition of the orthorhombic YBa2Cu3O7-x superconducting phase occurring during the elaboration process. Addition of an in situ oxygen donor, such as Cu2O oxides in the initial powder mixture, appears insufficient to stabilize the oxygen stoichiometry of the superconducting particles. Conclusions are drawn as a guideline for further process designing.