SILICON CARBIDE CERAMIC
THE IDEAL WEAR PROTECTION FOR EXTREME CONDITIONS

MANUFACTURE AND PROPERTIES

According to the material classification system for ceramics, silicon carbide ceramic forms part of the group of non-oxide ceramics. Two types are available:

  • The base materials are high-grade silicon carbide raw materials, silicon dioxide (SiO2), and aluminium oxide
  • Special quality through a silicon nitride compound (Si3N4)

SiC granules are mixed with temporary and permanent bonding agents. They are manufactured in a dry, semi-dry, or compression process. Formpieces are shaped by casting, followed by a sintering process.
Characteristics:

  • Excellent resistance to temperature fluctuations
  • High temperature resistance
  • High degree of hardness
  • High thermal conductivity
  • Corrosion resistance
  • Max. service temperature limit, depending on the quality, up to 1.700°C

PRODUCT RANGE AND FORMATS

Depending on the production process, simple or complex geometric shapes (similar to cast metal elements) are possible, as are parts with large surface areas (1 m2) or smallest-scale parts.

  • Tiles
  • Formpieces and pipes (casting process)
  • Wall thicknesses ranging from 10 to 75 mm (min. 6 mm)
  • Possible formats of the formpieces: max. length 1.200 mm, max. width 1.000 mm, max. thickness 75 mm, min. thickness 6 mm (depending on the overall dimensions)

AREAS OF APPLICATION

Silicon carbide ceramic differs from other wear protection materials in particular by its distinctly high resistance to temperature fluctuations. It is therefore used as protection against abrasive wear as well as impact wear in areas subject to very high service temperatures combined with fluctuations of temperature in rapid succession.
Typical applications are, for example:

  • Lining aluminium pouring spouts
  • Lining pulverised fuel piping in the vicinity of the burner
  • Nozzles
  • Lining fans in power plant coal units
  • Hydro-cyclone linings

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