bijmetaal

Bijmetaal is a Dutch term used for a material that combines two or more metals, typically in a way where one metal forms a distinct layer or phase relative to the other(s). In common usage the concept can refer to both layered (clad) structures and, less precisely, certain types of alloys. The emphasis of bijmetaal is on the combination of metals with different roles, rather than on a single homogeneous composition.

A key distinction is that bijmetaal often implies a layered or bonded arrangement rather than a uniform alloy. In practical terms, this includes base metals that are coated or clad with a different metal, as well as coins or jewelry made by combining two metals. Such configurations allow a desirable appearance or surface properties (for example, a precious-metal look or improved wear resistance) while controlling cost and material performance.

Applications of bijmetaal are wide. In jewelry and decorative objects, plating or layering can achieve the look of expensive metals at lower cost. In coinage, bimetallic or layered designs use two metals to balance durability and minting costs. In electronics and hardware, thin-film coatings or layered materials provide enhanced corrosion resistance or hardness.

Advantages of bijmetaal include cost savings, customizable properties (strength, hardness, appearance), and the ability to tailor performance. Disadvantages can include adhesion challenges, differential thermal expansion, wear of the surface layer, and complexities in recycling.