China Southern Advanced Ceramic Technology Co., Ltd.

China Southern Advanced Ceramic Technology Co., Ltd.
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Si3N4 Cermaic Tube
Si3N4 Cermaic Tube

Item : CSG1000759

Details :


Silicon nitride is a man made compound synthesized through several different chemical reaction methods. Parts are pressed and sintered by well developed methods to produce a ceramic with a unique set of outstanding properties. The material is dark gray to black in color and can be polished to a very smooth reflective surface, giving parts with a striking appearance. High performance silicon nitride materials were developed for automotive engine wear parts, such as valves and cam followers and proven effective. The cost of the ceramic parts never dropped enough to make the ceramics feasible in engines and turbochargers. The very high quality bodies developed for these demanding high reliability applications are available today and can be used in many severe mechanical, thermal and wear applications.
Key Properties:
A Hihg Strength over a wide temperature range
B High Fracture toughness
C High Hardness
D Outstanding Wear Resistance ,both both impingement and frictional modes
E Good Thermal Shock Resistance
F Good Chemical Resistance
G Lightweight
H Strong
I Hard
J Tough
K Low Coefficient of Friction
L Contact Fatigue Resistant
Typical Silicon Nitride Use:
A Rotating Bearing Balls and Rollers
B Cutting Tools
C Engine Moving Parts---Valves,Turbocharger Rotors
D Enginer Wear Parts---Cam Followers,Tappet Shims
E Turbine Blades,Vanes,Buckets
F Metal Tube Forming Rolls and Dies
G Precision Shafts and Axles in High Wear Environments
H Weld Positioners
 
General Silicon Nitride Informations:
The material is an electrical insulator and is not wet by nonferrous alloys. Silicon nitride is a rather expensive material, but it’s performance to cost benefit ratio is excellent in the applications where it can outperform the normally utilized materials with long life and very reliable low maintenance operation.
Product Tyep:
 
A Reaction Bonded Silicon Nitride (RBSN) is a high purity grade of silicon nitride having a density of approximately 70-80% theoretical. RBSN has excellent thermal shock resistance and outstanding compatibility with non-ferrous molten metals. This lower cost alternative to the fully dense silicon nitride grades can be manufactured to close tolerance without the need for expensive diamond grinding.

B Hot Pressed Silicon Nitride (HPSN) is formulated into a variety of compositions having minimal densification aids. These HPSN compositions offer the highest strength of Ceradyne’s silicon nitrides. Finished components are machined at Ceradyne’s precision diamond grinding facility. Products produced from HPSN are:
1)Industrial
2)Semiconductor
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