Ceramic-reinforced metal matrix composites (MMCs) display beneficial properties owing to their com-bination of ceramic and metal phases.However,the properties are highly dependent on the reinforcing phase composition,volume fraction and morphology.Continuous fiber or network reinforcement mor-phologies are difficult and expensive to manufacture,and the often-used discontinuous particle or whisker reinforcement morphologies result in less effective properties.Here,we demonstrate the forma-tion of a co-continuous ceramic-reinforced metal matrix composite using solid-state processing.Binder jet additive manufacturing (BJAM) was used to print a nickel superalloy part followed by post-processing via reactive sintering to form a continuous carbide reinforcing phase at the particle boundaries.The kinetics of reinforcement formation are investigated in order to develop a relationship between reactive sintering time,temperature and powder composition on the reinforcing phase thickness and volume fraction.To evaluate performance,the wear resistance of the reinforced B JAM alloy 625 MMC was com-pared to unreinforced BJAM alloy 625,demonstrating a 64％ decrease in the specific wear rate under abrasive wear conditions.