| Autor: |
Kübler, Jakob, Eblagon, Fernando, Graule, Thomas, Ehrle, Bruno |
| Zdroj: |
Key Engineering Materials; February 2008, Vol. 368 Issue: 1 p1062-1067, 6p |
| Abstrakt: |
Industrial wood cutting is a highly demanding application for cutting tool materials as a wedge angle of ~50°, a tip radius in the 1 [removed info]m range, and high wear, temperature and corrosion resistance are needed. For this application Si3N4 based ceramic matrix composites (CMC) were developed. Cutting tests showed that reinforcing Si3N4 with 30 wt.% SiC gives a good balance between fracture toughness and wear resistance. The use of an yttria / lanthana sintering aid system resulted in a fine-grained microstructure without degrading the fracture toughness. Post heat treatment was essential for the integrity of the cutting edge. Finally, cutting tests proved that the CMC cutting tips had a 3-fold lifetime compared to tungsten carbide. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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