Introduction to machinable ceramic materials

Machinable ceramics (microcrystalline glass-ceramics) are multifunctional materials with high hardness, high strength, and excellent elastic modulus, exhibiting outstanding mechanical properties that make them suitable for industrial applications involving extreme forces and abrasion. They also possess high-temperature stability, low thermal conductivity, and good thermal shock resistance, making them suitable for thermal insulation applications. Furthermore, their excellent electrical insulation properties make them highly effective in electronic and electrical applications.

Caractéristiques

Machinable ceramics are a very unique and useful material with a number of compelling properties.

1. Excellent mechanical properties and applications

Machinable ceramics possess exceptional mechanical properties, including high hardness, high strength, and excellent compressive strength. These properties make machinable ceramics ideal for many industrial applications, especially in environments where materials need to withstand extreme forces and abrasion.

High Hardness and Strength:

Rockwell Hardness: R45N = 40.

Vickers Hardness (500g Load): 11.5 GPa (1175 Kg/mm²).

Modulus of Elasticity: 65 GPa at 25℃.

Flexural Strength: 108 MPa at 20℃.

Compressive Strength: 488 MPa at 20℃.

These mechanical properties enable machinable ceramics to remain stable under impact and stress, reducing the likelihood of breakage. Due to their high strength and wear resistance, machinable ceramics are often used to manufacture a variety of high-performance industrial components, such as parts in milling machines, sliding parts, and cutting tool inserts.

2. Excellent thermal properties

Machinable ceramics also possess excellent thermodynamic properties, including high-temperature stability, low coefficient of thermal expansion, and good thermal shock resistance.

Maximum operating temperature: 800℃.

Thermal conductivity: 1.71 W/(m·K) at 25℃.

Coefficient of thermal expansion: 7.2 × 10⁻⁶/℃.

Thermal shock resistance: 200℃.

These properties make machinable ceramics extremely useful in applications requiring thermal insulation or heat preservation. For example, in certain chemical process equipment and high-temperature furnaces, machinable ceramics can be used as insulation layers to help control temperature and protect sensitive mechanical components from overheating damage.