DClading

DClading is a term used in surface engineering to denote a dual-layer cladding process in which two distinct cladding materials are sequentially deposited onto a substrate to create a composite surface with tailored properties. The name is commonly interpreted as "dual cladding," and the concept is discussed in the context of enhancing surface performance through controlled layering.

The typical process involves preparing the substrate, applying the first cladding layer, and then applying a second layer on top of or adjacent to the first. Bonding between layers is encouraged through controlled diffusion, annealing, or interfacial treatments. A range of deposition techniques can be employed, including laser cladding, arc deposition, physical vapor deposition, chemical vapor deposition, and electroplating. Process parameters such as temperature, deposition rate, and layer thickness are selected to optimize adhesion and the desired combination of properties.

Materials configurations for DClading commonly include metal/metal pairs to improve mechanical strength and wear resistance, metal/ceramic combinations to enhance hardness and thermal stability, and polymer/metal or polymer/ceramic pairings for corrosion resistance and toughness. The interfacial region between layers can be engineered to reduce residual stresses and minimize diffusion-related degradation.

Applications of DClading span sectors such as aerospace, automotive, oil and gas, and chemical processing, where components benefit from tailored surface properties without replacing bulk material. Reported advantages include improved wear and corrosion resistance, customizable hardness profiles, and the ability to combine properties that are difficult to achieve with a single coating. Challenges include achieving robust interfacial adhesion, controlling layer integrity at scale, and managing costs.

See also: Cladding, Coating, Surface engineering, Laser cladding, Functionally graded materials.