HARD MATERIALS

ALUMINA (AL2O3)

Alumina or aluminium oxide (Al2O3) has good mechanical resistance to high temperatures, high electrical resistivity, good thermal conductivity, it is a material of great hardness, it also resists very well to wear.

Applications

  • Alumina is the material most frequently machined by the Rubis-Précis Group, we work with it for various and varied fields of activity. It is found in electrical connectors and insulators for high current and voltage, high temperature probes, medical implants, pistons, nozzles, bearings, wearing parts, crucibles, mechanical joints, etc.

ZERODUR®

This is a ceramic that has a very great hardness, good chemical stability and excellent vacuum properties as well as being non-porous and impact resistant. It offers good polishing accuracy as well as good thermal stability.

Applications

  • Appreciated in the field of Astronomy.

ALUMINIUM NITRIDE (ALN)

Aluminium Nitride has three main technical properties: its very high thermal conductivity, its good resistance to corrosion and its efficiency in terms of electrical insulation.

Applications

  • The Group works with this material for the fields of microelectronics, electronics, and dielectric.

SILICON CARBIDE (SIC)

This material is of great hardness, is highly resistant to thermal shock, has low thermal expansion and high thermal conductivity.

Applications

  • Used in the manufacture of bearings, friction and wearing parts, gaskets, chucks.

SILICON NITRIDE (SI3N4)

Silicon Nitride is appreciated for its great hardness, low density, good resistance to wear, abrasion, corrosion, and thermal shock.

Applications

  • Silicon Nitride is found in sealing rings, tooling, instrumentation, wear parts, welding nozzles, protective grids.

MACOR®

This is a glass ceramic that combines precision with speed and ease of machining. Its main assets are: good electrical and thermal insulation, strength, and rigidity. It can also be polished and used up to 1000 ° C. Its very good machinability reduces manufacturing costs.

Applications

  • We use Macor among other materials, for the manufacture of nozzles, pistons, measuring sensors and insulators. It is a material that can be metallized and brazed.

ZIRCON (ZRO2)

Zircon has good mechanical properties at high temperatures, low thermal conductivity at room temperature, excellent wear resistance, great hardness, polishability, good chemical inertness, high resistance to attack by metals and thermal shock.

Applications

  • We manufacture zircon polished parts, pistons, valves, implants, cutting blades, watch cases, cabochons, bracelet links, items of jeweller, ...

QUARTZ

Quartz is a very good thermal and electrical insulator. It is a hard material that withstands high temperatures. It is also known for its good optical quality, it is transparent to infrared and permeable to UV.

Applications

  • Quartz is appreciated in the field of semiconductors, we machine components for microelectronics, portholes and lenses, prisms, tubes, ...

BORON CARBIDE (B4C)

Its main quality is its very great hardness. Boron Carbide also has high thermal conductivity, good resistance to wear, to strong acids and to alkalis.

Applications

  • Boron Carbide is very popular in the fields of protection, security, nuclear energy, and defence. We machine parts for shields, nozzles, body protection vests, ...

BORON NITRIDE (BN)

The properties of Boron Nitride are: its high thermal conductivity and dielectric strength, its low thermal expansion and dielectric constant, its excellent resistance to thermal shock, its microwave transparency, its good machinability, and its lubricant properties.

Applications

  • We manufacture with this material crucibles for foundries, furnace linings, thermocouple sleeves, ...

SAPPHIRE (AL2O3)

Sapphire is a single crystal of alumina, it is undoubtedly the second hardest material that exists, just behind diamond. It has excellent resistance to thermal shock and high temperatures with a melting point at 2000°C. In the polished state, it is completely transparent. Sapphire is appreciated for its natural beauty. It is suitable for the watch industry, but also for more technical environments for precision fields. Ideal for demanding applications as it is acid resistant, has low electrical conductivity and is stable against external influences.

Applications

  • Portholes, optical glass, watch glass, cabochons, surgical materials, implants, pistons, prisms and lenses, tubes and test tubes, windows, high-pressure application ...

RUBY

Ruby is composed of a single crystal of aluminium oxide with chromium oxide. It is a material that has a high hardness and excellent chemical resistance. Transparent, scratch resistant, appreciated for its aesthetic quality. Ruby also possesses technical qualities which grant it good general usefulness.

Applications

  • Ruby is found in sprinklers, sealing valves, balls, feeler pins, bearings, wear parts, decorative cabochons, etc.

SILICON (SI)

Silicon has excellent electrical conductivity, it is polishable and metalizable.

Applications

  • We use it mainly in the design of chips, photovoltaic panels, and wafers.

FERRITE (C4AF)

Ferrite is a ferromagnetic ceramic, it offers good electrical and magnetic conductivity.

Applications

  • Used for the manufacture of magnets, automotive components, micromotors, toroids, etc.

CHROME-COBALT (COCR)

This alloy has good chemical, thermal and mechanical properties if we refer to the EN ISO 9693 standard. It is biocompatible, resistant to corrosion, wear, and heat.

Applications

  • Used in the restoration and manufacture of dental prostheses, in the fields of medicine, aeronautics and industry.
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