Nanocrystalline Ni–B coating surface strengthening pure copper

An electroless deposition technique is used to synthesize nanocrystalline Ni–B coating in strengthening the surface of pure copper. The microstructure and some properties of Ni–B coating are studied. It is practicable to coat a uniform and continuous nanocrystalline Ni–B hardening layer on copper surface by this technique, Ni2B and Ni3B are formed in the Ni–B coated layer during heat treatment, and the average grain size of nanocrystalline Ni–B coating is about 42–65 nm and properties of the prepared copper alloys are also improved