碳化硅镍（CODIAC）是化学镀基体（通常是镍/磷合金）的再生层，其内部均匀分布着细碎的颗粒。Nickel Silicon Carbide (CODIAC) is a regenerative layer of an electrolessly plated matrix, usually a nickel/phosphorus alloy, with finely divided particles uniformly dispersed in it. The particles are uniform in size and the coating contains 30% carbide by volume. The nickel matrix alloy most commonly used is made up of 90-93% nickel and 7-10% phosphorus.