Silicon Carbide Whisker Ceramic Reinforcement
CAS Number: 409-21-2
Silicon carbide (SiC) whiskers are single-crystal fibrous reinforcements used to improve the fracture toughness and mechanical strength of ceramic matrix composites, particularly in alumina and silicon nitride matrices. SiC whisker additions of 20–30 vol% can increase KIC by 2–4x through crack-bridging and crack-deflection toughening mechanisms.
Technical Specifications
| appearance | Light green or gray fibrous powder |
| purity (%) | ≥98 |
| aspect ratio | >10 |
| diameter (µm) | 0.1–1.5 |
| SiC content (%) | ≥98 |
Applications
- Reinforcement for alumina cutting tool ceramics
- Toughening agent in Si3N4 structural ceramic composites
- Thermal shock-resistant ceramic composite components
- High-temperature wear-resistant ceramic materials
- Reinforcing phase in mullite and other oxide ceramics
Key Features
- Dramatically increases fracture toughness through crack-bridging mechanisms
- High aspect ratio enables efficient load transfer from matrix to whisker
- Excellent high-temperature stability up to 1600 °C in inert atmosphere
- Compatible with hot pressing and hot isostatic pressing consolidation
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CAS Number
409-21-2
Category
Ceramic / Glass AdditivesAvailability
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