Silicon Nitride (Si3N4) is a unique technical ceramic, available from Morgan in two distinct grades: Reaction-Bonded Silicon Nitride and SSN Nilcra® SiAlON E.
Each of the grades features their own unique properties in terms of high temperature mechanical strength, outstanding thermal shock resistance & chemical corrosion resistance.
SSN Nilcra® Sialon E grade
Nilcra® SiAlON E is an exceptionally reliable, hard-wearing and nonporous silicon nitride; a high strength ceramic designed for applications demanding high durability, toughness, corrosion, and wear resistance even at very high temperatures (up to 1000°C [1832°F]).
Additionally, its low coefficient of thermal expansion, combined with high strength and toughness, provides excellent thermal shock resistance outperforming most other ceramic materials when used in demanding high temperature conditions.
Nilcra® SiAlON E is a sintered silicon nitride based ceramic material containing interlocking grains of beta phase silicon nitride contributing to outstanding durability and performance.
Morgan's SiAlON E is suitable for a range of applications:
- Severe duty valve trims and pumps
- HF weld rolls for steel & aluminium tube production
- Scientific instrumentation
- Wire drawing
- Materials handling
Reaction–Bonded Silicon Nitride (RBSN)
RBSN has notable high temperature strength, creep resistance and oxidation resistance, but with relatively lower mechanical properties than Sialon E due to the porosity levels. Additionally, RBSN low thermal expansion coefficient provides superior thermal shock resistance, compared with most ceramic materials.
The manufacturing process of RBSN has only a small volume change allowing net shape forming, offering a cost advantage to other grades of SiN.
RBSN can be utilised in many applications, including:
- Molten metal handling
- Thermocouple sheaths
- Welding jigs and fixtures
- Welding nozzles