Machinable Ceramics

Combat® Boron Nitride -- machinable ceramics solve problems that could not possibly be tackled with other ceramics

Boron Nitride machinable ceramic is made by hot pressing Boron Nitride powders at high temperature and pressure. Combat Boron Nitride can easily be machined into rods, bars, plates and even intricate custom shapes.

The unique combination of highly exceptional thermal, physical and chemical characteristics of Combat Boron Nitride ceramic makes it ideal for solving tough challenges in a wide range of industrial applications.

Excellent thermal shock resistance
High electrical resistivity
High thermal conductivity
Good chemical inertness
High temperature material
Excellent lubricating properties -- low coefficient of friction
Non-wetting (without oxidation)
High dielectric breakdown strength
Excellent machinability

Combat® BN Machinable Ceramics (Solids), Grade AX05

Combat® BN Machinable Ceramics, Grade AX05

The best in its class, Combat® Machinable Ceramics Grade AX05 is the highest purity hBN available at 99.7%+. With its high purity, it offers the highest temperature resistance in excess of 2000ºC in inert or vacuum environments, while maintaining its outstanding electrical insulator properties at a dielectric strength of >40kV/mm. This makes it an excellent choice for applications where high temperature capabilities and corrosion resistance are important.

AX05 is a unique, binder-less ceramic with exceptional thermal conductivity and thermal shock resistance. Its high purity makes it exceptionally suitable for applications where other hBN ceramics fail - crucibles for high-purity molten metals, nozzles for specialty alloys, insulators for high temperature etc.

Combat® BN Machinable Ceramics (Solids), Grade A | Saint-Gobain

Combat® BN Machinable Ceramics, Grade A

Combat® Machinable Ceramics Grade A uses B₂O₃ binder system to add mechanical strength to hot pressed hBN. One of the legacy products since the scientific community discovered the benefits of hot pressed hBN, Grade A is specified into applications from a long time ago. Grade A offers a practical choice for high temperature insulators, kiln furniture, and general purpose applications, and continues to finds new applications.

Due to the hygroscopic binder system, care must be taken during storage and use to avoid exposure to moisture.

Combat® BN Machinable Ceramics (Solids), Grade HP

Combat® BN Machinable Ceramics, Grade HP

Combat® Machinable Ceramics HP Grade uses calcium borate binder system. It is particularly useful for applications where low thermal expansion, high thermal shock resistance, and increased spall resistance is required. A great alternative for minimal moisture exposure due to its binder system, Grade HP is Saint-Gobain’s workhorse hBN grade sold in applications worldwide.

Like all other hBN grades offered by Saint-Gobain, both HP and HPL are easily machinable to intricate shapes with precise tolerances.

Combat® BN Machinable Ceramics (Solids), Grade M & M26

Combat® BN Machinable Ceramics, Grade M & M26

Combat® Machinable Ceramics Grade M and M26 are unique ceramic composites of hBN in a silica matrix, offered only by Saint-Gobain. Silica (SiO₂) binder system contributes to its excellent moisture/thermal shock resistance. These grades can operate up to 1400°C,

M26 Grade has 60% hBN and 40% semiconductor grade SiO₂, whereas M has 40%hBN and 60% semiconductor grade SiO₂. M26 Grade has an edge in applications where better mechanical strength is required. M has an advantage in applications where higher thermal conductivity and moisture resistance is required.

While both Grades M and M26 are both thermally excellent materials, the most important features these grades offer is the electrical properties - high dielectric strength (>40KV/mm) along with a low dielectric constant k (<4), making them exceptionally useful in microwave environments in the GHz ranges. These grades have successfully passed MIL-I-10A grade of L542 test, a procedure requiring immersion in water for 48 hours prior to testing at elevated frequencies.

Combat® BN Machinable Ceramics (Solids), Grade ZSBN | Saint-Gobain

Combat® BN Machinable Ceramics, Grade ZSBN

Combat® Machinable Ceramics ZSBN Grade combines the best properties of hot-pressed boron nitride with the non-reactivity and strength of zirconia and silicon carbide. Most commonly used as break rings for horizontal continuous casters, its unique thermal, chemical, electrical, wear and machinability properties permit a wide variety of molten-metal-contact applications.

ZSBN Grade - hard ZrO₂ particles evenly dispersed with soft BN platelets in the hard borosilicate glass matrix – offers outstanding wear resistance, non-wetting properties, high thermal conductivity and superior high temperature strength. ZSBN Grade is ideal for molten metal applications such as continuous casting breakrings, metal atomizing nozzles, and side dams for thin strip casting. Other potential areas for ZSBN Grade include wear components, guides and rollers in diverse glass and light-metal baths.

NEW -- Combat® BN Machinable Ceramics, Grade SiZBN

COMBAT® hot-pressed composites of hexagonal Boron Nitride from Saint-Gobain Ceramic Materials exhibit a unique combination of chemical, electrical, mechanical and thermal properties, making it suitable for a wide range of high-performance industrial applications.

SiZBN combines the non-wetting properties of boron nitride and extreme refractory of zirconia with wear resistance and strength of SiAlON. This newest composite from Saint-Gobain is ideal for components requiring strength at high temperatures in variety of molten metals and steel contact applications.

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