Sialon Riser Tubes

This new isostatically pressed class of advanced ceramics shows a major improvement with regards to the impact fracture toughness of  Silicon Nitride riser tubes.

Because of unique properties to withstand thermal shock, erosion, and corrosive attack, coupled with its impervious and non wetting advantages, Sialon riser tubes and silicon nitride riser stalks are long lasting and mainly maintenance free.

Our sialon riser tubes or riser stalks have excellent non-wetting properties and a smooth surface are also important new features. Sialon ceramics can now be manufactured in nearly all shapes.

Sialon riser tubes or riser stalks are an alloy of silicon nitride and aluminum oxide. The combined properties of silicon nitride (high strength, hardness, fracture toughness, and low thermal expansion) and aluminum oxide (corrosion resistance, chemically inert, high temperature capabilities, and oxidation resistance).

22 in stock (can be backordered)

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Description

Sialon riser stalks are available with plain ends, grooved ends for assembly with metal flanges, or with integral collars for the optimum in strength and reliability. Tooling available for most LP diecasting machines

Sialon data sheet

Material data sheet Sialon (Si3Al3O3N5)
Typical Sialon grades NVD-001 NVD-002 NVD-003 NVD-004
Bulk Density g/cm3 3.2 3.1 3.3 3.2
Water Absorption 0 0 0 0
Flexural Strength MPa 580 900 1,020 790
Vickers Hardness HV1 GPa 13.9 12.7 15.0 13.8
Fracture Toughness (SEPB) MPam1/2 4 ~ 5 6 ~ 7 7 6 ~ 7
Young’s Modulus of Elasticity GPa 290 270 300 290
Poisson’s Ratio 0.28 0.28 0.28 0.28
Coefficient of Linear Thermal (40 – 800 °C)

Expansion

×10-6/℃ 3.2 3.4 3.3 3.5
Thermal Conductivity (20℃) W/(m・k) 25 23 27 54
Specific Heat J/(g・k) 0.64 0.66 0.65 0.66
Heat Shock Resistance 550 800 800 900
Volume Resistivity (20℃) Ω・cm >1014 >1014 >1014 >1014

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