Materials on the basis of silicon carbide (SIC) belong to the most important carbide ceramics. Depending on the manufacturing process and the type of bonding SC ceramics differ:
They stand out for their typical properties:
Sintered silicon carbides is made from SC finest powder plus sinter additives, and is sintered at 2000 to 2200 °C in a controlled atmosphere. Its outstanding features are
These excellent properties are effectively supplemented by
SSIC is especially suitable for applications with high demands e.g.
SSIC consists to 85 - 94% of SC and correspondingly 15 - 16% of metallic silicon. There is no shrinkage during the sintering process because of the composite manufacturing process. This is why extraordinary large components with exact dimensions can be manufactured. The application temperature is limited to approx. 1380 °C due to the share of metallic silicon.
SSIC has a
SSIC is high suitable for the production of
RRSIC is a pure SIC material with an open porosity of approx. 11 to 15 %. As a result it has in comparison to the dense SIC ceramics a lower strength, but an
The non-shrinking manufacturing process enables the production of large size RSIC components which are then mainly used as kiln furniture with
The maximum application temperature lies between 1600 and 1650 °C.
Analogue Analogue to RSIC this is also an open porous material with approx. 12 to 15% porosity. During a nitride process in which non-shrinking components are able to be manufactured, a green body made of SIC is nitrided in a nitrogenous atmosphere at 1500 °C. In comparison to RSIC the porosity is finer and seals itself with a very thin glaze at
This oxidation process allows the use of NSIC components as kiln furniture with a
Further, more detailed information to this in the Breviary