Ni-B/diamond composite coatings were prepared using electrophoretic deposition and electroless deposition methods, leading to extremely high hardness which is comparable to hard coatings prepared by dry processes.
Super hard Ni–B/diamond composite coatings were prepared by electrodeposition. Such extreme hardness (ca. 2500 Hv) was ascribed to a large content of diamond particles and hardness of Ni–B matrix. Thermal treatment of the coatings resulted in the formation of Ni–B alloys, which led to increase in film hardness. This method is much simpler than previously reported methods for preparing hard coatings.
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