Properties of Si3N4-TiN composites fabricated by spark plasma sintering by using a mixture of Si3N4 and Ti powders
Si3N4–TiNcomposites were successfully fabricated via planetary ball milling of 70 mass% Si3N4 and 30 mass% Tipowders, followed by sparkplasmasintering (SPS) at 1250–1350 °C. The sintering mechanism for SPS was a hybrid of dissolution–reprecipitation and viscous flow. The electrical resistivity decre...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Published: |
Elsevier B.V.
2010
|
| Subjects: |
| Summary: | Si3N4–TiNcomposites were successfully fabricated via planetary ball milling of 70 mass% Si3N4 and 30 mass% Tipowders, followed by sparkplasmasintering (SPS) at 1250–1350 °C. The sintering mechanism for SPS was a hybrid of dissolution–reprecipitation and viscous flow. The electrical resistivity decreased with increasing sintering temperature up to a minimum at 1250 °C and then increased with the increasing sintering temperature. The composites prepared by SPS at 1250–1350 °C could be easily machined by electrical discharge machining. Composite prepared by SPS at 1300 °C showed a high hardness (17.78 GPa) and a good machinability. |
|---|