What is the advantage of the Ceramic Compression Spring?
Would you like to use springs in the high temperature range or in strong acids?
The solution for this problem: |
Ceramic springs produced by: NHK Yokohama Japan
|
Why ceramic springs: |
high temperature resistance
|
Siliconnitride has excellent characteristics
- Siliconitride compresses when moving from the alpha to the beta-phase
- This process creates structures with embedded bars
- These structures create the high strength of silcon nitride
Properties of different materials
Comparison table for physical properties of different materials
Material |
Siliconnitride |
PSZ |
AISI304 |
INCONEL 718* |
Specific weight
|
3,2-3,25 | 6,05-6,1 | 7,93 | 8,19 |
Hardness (Gpa) |
16-19 | 13-15 | 3,6-5,3 | 3,7-4,0 |
Young-modulus (Gpa) |
275-295 | 186-196 | 196 | 200 |
Shearing modulus (Gpa) |
110-117 | 73-78 | 79 | 77 |
At room temperature |
* bases on brochure published by: The International Nickel Company, Inc. |
Strength at high temperature applications
- The strength of siliconnitride remains constant in the range between room temperature and 1000° Celsius
- The strength remains on a level of 200MPa with an error of 0,1% at a temperature between room temperature and 1200° Celsius
- After fatigue tests at 900°C no deformations were recorded
