fémkerámia

Fémkerámia, also known as cermet, is a composite material made of ceramic and metallic components. The name itself is a portmanteau of "metal" and "ceramic." These materials are engineered to combine the desirable properties of both constituent materials, offering a unique set of characteristics that make them suitable for various demanding applications.

The ceramic component typically provides hardness, high-temperature resistance, and wear resistance, while the metallic component contributes toughness, ductility, and thermal or electrical conductivity. The specific properties of a fémkerámia depend on the chosen ceramic and metal phases, as well as their proportions and microstructure. Common ceramic materials include oxides, carbides, and nitrides, while metals like tungsten, molybdenum, and cobalt are frequently used.

The manufacturing process for fémkerámia often involves powder metallurgy techniques, such as pressing and sintering. These methods allow for precise control over the composition and microstructure of the final material. The sintering process fuses the ceramic and metal particles together, creating a dense and robust composite.

Fémkerámia finds application in fields where high performance is crucial. This includes cutting tools, where their hardness and wear resistance allow for efficient machining of tough materials. They are also used in aerospace components, due to their ability to withstand extreme temperatures and harsh environments. Other applications include friction materials, such as brake pads, and components for wear-resistant parts in industrial machinery. The development of new fémkerámia compositions continues to expand their utility in advanced technological areas.