Electrodeposited metallic materials comprising cobalt

The free-standing layer or coating comprising Co, according to claim 21 which is

• (i) Co metal with unavoidable impurities,
• (ii) alloy of Co with one or more metals selected from the group consisting of Al, Fe, Mo, Ti, W and Zr;
• (iii) Co metal or Co alloy as defined in (ii) also containing at least one element selected from the group consisting of B, C, H, O, P and S;
• (iv) any of (i), (ii) or (iii), where said layer or coating comprising Co also contains particulate additions in a volume fraction up to 95%.

An article comprising a metallic Co-bearing layer, having

• (i) a thickness between 5 μm and 2.5 mm;
• (ii) at least one deposit property of said metallic Co-bearing layer selected from the group consisting of chemical composition, grain size, hardness, yield strength, Young's modulus, resilience, elastic limit, ductility, internal stress, residual stress, stiffness, coefficient of thermal expansion, coefficient of friction, electrical conductivity, magnetic coercive force, thickness;
• and in the case of metal matrix composites, volume particulate fraction particulate particle size, particulate shape and/or particulate chemistry, varied by more than 10% in the layer height direction;
• and
• (iii) said metallic layer having a microstructure which is fine-grained with an average grain size between 2 and 5,000 nm and/or amorphous.

An article comprising:

• (i) An electrodeposited metallic material comprising Co having a microstructure which is fine-grained with an average grain size between 2 and 5,000 nm and/or an amorphous microstructure;
• (ii) said metallic material forming at least part of an exposed surface of said article;
• (iii) said metallic material having an inherent contact angle for water of less than 90 degrees when measured on its flat and smooth surface at room temperature;
• (iv) said exposed surface of said metallic material having structures incorporated into at least portions therein to increase the contact angle for water at room temperature to over 100 degrees.