Abstract
Processing is carried out under two different conditions, one of which is pressureless sintering and the other a combination of pressureless sintering and gas-pressure sintering (two-step sintering) at 1700°C. By varying the fabrication of powder compacts and their sintering conditions, dense silicon nitride products with different characteristics such as density, grain-boundary phases, grain size and morphology of β-grains are obtained. These characteristics determine the mechanical properties of silicon nitride at temperatures ranging from RT to 1400°C. Thus, the effects of processing conditions on microstructural development and strength of silicon nitride with mixed magnesia/neodymia additives are investigated using 4-point bending test.
| Original language | English |
|---|---|
| Pages (from-to) | 45-56 |
| Number of pages | 12 |
| Journal | Key Engineering Materials |
| Volume | 32 |
| Publication status | Published - 1989 |
| Event | Durability and Failure in Engineering Materials: Proceedings of the 5th Irish Durability and Fracture Conference - Cork, Irel Duration: 1 Oct 1987 → 2 Oct 1987 |