Heat-Resistant Graphites

HEAT-RESISTANT GRAPHITES

Powder Metallurgy and Cermet Manufacturing

Mersen’s heavy-duty graphites for pressure sintering processes

Mersen graphites are widely used in pressure sintering processes to manufacture tooling for industrial diamond and hard metal cutting inserts as well as ceramic armor components for defense applications. Customers particularly value the excellent material properties of Mersen’s isostatic graphites under extreme high-temperature conditions.

Dynamic Sealing

Cost-effective and reliable sealing systems for fans, exhausters, turbo-compressors, dryers, and water turbines

Mersen’s TURBOGRAF sealing system is a labyrinth seal for rotary shafts in gas and steam applications. With proper selection, leakage can be reduced to near zero.

Isostatic Graphite Solutions for Continuous Casting

Solutions for continuous casting of copper alloys, precious metals, and cast iron

Thanks to their unique physical characteristics, Mersen’s isostatic graphites are ideal for use in continuous casting molds and crucibles:

• Resistance to molten metal temperatures

• High thermal conductivity

• Low thermal expansion coefficient (CTE) for dimensional stability

Boostec® Silicon Carbide (SiC)

Wide range of applications:

• Aerospace and astronomy: Optical and scientific instruments for use in space or on Earth, structural components, large scientific equipment

• Laser processes: Galvo scanner mirrors and other high-speed beam deflection mirrors

• OEMs for semiconductors and optomechanical systems: Ultra-rigid structures

• Chemical and pharmaceutical industries: Continuous flow reactors, heat exchangers

CALCARB® Rigid Carbon Insulation

High-performance insulation for high-temperature processes

CALCARB® provides superior insulation performance at high temperatures, making it ideal for customers focused on energy efficiency in manufacturing.
By selecting different grades and densities, thermal properties can be adapted to suit specific process requirements.

Carbon/Carbon Composite Parts for Hot Glass Handling

Mersen has decades of experience manufacturing deflector plates, transfer and pusher fingers, and deposition rods from Cerberite® CM20 and CM80 composite materials.
These unique grades, reinforced with a pyrolytic graphite matrix and third-direction reinforcement, provide exceptional oxidation resistance and significantly extended service life.
Compared to standard carbon/carbon composites, Cerberite® parts typically offer double the lifespan.

Cerberite® for the Hot Glass Industry

Mersen has decades of experience manufacturing deflector plates, transfer and pusher fingers, and placement rods from Cerberite® CM20 and CM80 composites. These unique materials, reinforced with a pyrolytic graphite matrix and third-direction reinforcement, differ from standard carbon fiber/carbon materials by offering exceptional oxidation resistance and a significantly longer service life—often twice as long as traditional carbon/carbon composites.

Carbon/Carbon (CFC) Composites for Vacuum Furnace Refurbishment

Standard-quality CFC products for vacuum furnace insulation linings, including plates, profiles, and fasteners, ensure high levels of protection against mechanical and chemical damage, thereby increasing insulation durability and service life.

CFC screws and nuts provide high mechanical strength, are resistant to thermal and mechanical stress, and do not deform—offering a longer lifespan compared to metal fasteners.

Carbon/Carbon (CFC) Composite Fixtures for Heat Treatment

Replacing metal with carbon/carbon composites in heat treatment fixtures enables:

• Higher energy efficiency due to the very low thermal mass of the carbon composite—energy is focused on heating/cooling the parts, not the fixture

• Faster heating and cooling cycles

• Lower weight, making handling easier

• No thermal deformation, ensuring a longer lifespan

• No sticking of metal parts to the fixture surface

• Improved productivity

CFC trays and baskets are used in heat treatment processes such as:

• Vacuum brazing of automotive components

• Heat softening

• Low-pressure carburizing

• Gas quenching

• Case hardening of steel parts followed by oil quenching

PAPYEX® Flexible Graphite

Flexible graphite foil made from expanded natural graphite for high-temperature sealing applications.

Flexible graphite is manufactured from natural graphite flakes that are chemically treated with acids and oxidizers, expanded by heat, and then compressed into continuous sheets without any binder.

Key Features:

• Wide product range to meet the strictest sealing specifications

• Developed to suit applications across the automotive, oil & gas, and nuclear industries:

  • Engine head gaskets

  • Flange gaskets

  • Stem seals for nuclear gate valves

Availability:

• Roll width: 4 mm to 1500 mm

• Thickness: 0.15 mm to 3 mm

• Density: adjustable from 0.7 g/cm³ to 1.3 g/cm³

Applications:

• Heating elements in laboratory furnaces due to ease of shaping

• Thermal protection in high-temperature furnaces thanks to excellent reflective properties

• Protection of rigid insulating felts from gas and vapor erosion or corrosion

• Heat distribution and hot spot dissipation, particularly in brazing processes

• Mold protection during foundry operations

PAPYEX® combines flexibility, chemical purity, and thermal performance, making it a versatile solution for high-temperature industrial applications.