ALUMINA C799

ALUMINA C799

ALUMINA C799

ALUMINA C799

Basic properties

Very hard Abrasion resistant Can be milled with great precision Can be polished Stable at high temperatures No open porosity Excellent electrical properties Chemically inert High corrosion resistant.

Applications

Mechanical components Pistons, pump stages Mechanical seals Sealing bushes Faucet keys and seats Electrical insulator Pyrometry Laboratory items, crucibles Vacuum items Welding nozzles.

Realisations

Chemical composition: Aluminium Oxide 99,7% / Silica: 0,05% / Magnesia 0,03 % Sodium Oxide 0,15% / Iron oxide 0,02% / Calcium Oxide 0,03% / Titanium Oxide <0,01 / Boron Oxide <0,02%

BORON CARBIDE

BORON CARBIDE

BORON CARBIDE

BORON CARBIDE (B4C)

Basic properties

Low thermal conductivity
Low density
Sensible to thermal shocks
Exceptionnal hardness
Very high resistance to compression
Excellent wear resistance
Good neutron absorption
High elastic modulus

Applications

Neutron absorption / radioactivity uptake
Buses pour boues abrasives
Nozzles for abrasive slurries
Balistic protection: amored plates, shielding…

Boron carbide (chemical formula approximately B4C) is an extremely hard boron–carbon ceramic material used in tank armor, bulletproof vests, and numerous industrial applications. With a Mohs hardness of about 9.497, it is one of the hardest materials known, behind cubic boron nitride and diamond.

B4C can be mirror polished and has a very good resistance to acids. It is refractory and chemically inert. However, it is less resistant to oxidation than Silicon Carbide.

Boron Carbide Production methods:
Hot pressing and Hot isostatic pressing are good means for producing such a ceramic.
B4C is fully dense and has a pure single phase shape.

Hot pressing has the inconvenient of limiting the available sizes and shapes that could be produced.
B4C is machined with diamond tools.

Realisations

associated products ↓

SILICON CARBIDE

SILICON CARBIDE

SILICON CARBIDE

SILICON CARBIDE

Basic properties

Low density
High thermal conductivity (close to Aluminium)
Good thermal shock resistance
Liquid and gaz proof
High refractoriness (can be used at 1450°C in air and 1800°C in neutral atmosphere)
It is not affacted by corrosion and do not wet with melted aluminium or melted zinc.
High hardness
Low friction coefficient
Abrasion resistance
Resists to basic and strong acids
Polisheable
High mechanical strength

Applications

Mechanical components
Rotating joints
Plain bearings, bases, pads
Pump components
Chemical components
Mirors
Balistic protection
Heat exchanger

Realisations

SILICON NITRIDE

SILICON NITRIDE

SILICON NITRIDE

SILICON NITRIDE

Basic Properties

Excellent mechanical properties even at high temperature
Light
Low inertia
High hardness
Excellent resistance to friction and wear
Very high resistance to thermal shocks

Applications

Welding nozzles
TIG and plasma cutting (RSBN)
Bearings, shell bearings
Metal working tools
Inspection gauge
Bearing balls

Realisations

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