What Is Cermet And Its Features?

What Is Cermet And Its Features?

Cermet is a type of composite material formed by the combination of metal and ceramic, which combines the toughness of metal with the wear resistance, heat resistance and corrosion resistance of ceramic. Its English name is metal ceramic (ceramic + metal), and it is widely used in fields such as tool materials, wear-resistant parts, electronic components, and Aero engines.

Metal ceramics are usually formed by sintering ceramic phases (such as TiC, TiN, TiCN, WC, Al,O:) and metallic phases (such as Ni, Co, Mo, Fe) through powder metallurgy.

Ceramic phase → offers high hardness, high wear resistance, heat resistance and chemical corrosion resistance

Metallic phase → Provides toughness, reduces brittleness, and improves machinability. 

Common components of modern metal ceramics:

Tic-Ni, TiC-MoNi

TiCN fund metal ceramics

WC-Ni(Cobalt-free cemented carbide)

Alz0:-Mo, etc

Main Features of cermet is as below:

1. High hardness and wear resistance

The hardness can reach HRA 88-94, suitable for high-speed cutting or wear-resistant applications

2. Excellent high-temperature performance

It still maintains high strength at 800-1000°C and is not prone to softening.

3. Strong resistance to chemical corrosion

It is not prone to react with steel or non-ferrous metals and is suitable for fine processing.

4. Its toughness is superior to that of conventional ceramics

The addition of metallic phases significantly enhances the impact resistance, but its toughness is still lower than that of cemented carbide

5. Low friction coefficient, smooth cutting

Especially TiCN series metal ceramics are suitable for high-precision turning and smooth surface finishing.