Promising properties in Si3N4 were previously reported. Reliability, cost and toughness are yet to be resolved however. Current facing challenges of Si3N4 based on previous investigation in our laboratory are discussed in this report. In-situ reinforcement techniques by modification of microstructure in Si3N4 are discussed. These techniques include two-stage sintering and control of sintering environment. The effects of toughening particulates, such as TiN, TiC, and correlated surface pre-treatment techniques are reported. The effects of post heat treatment on the grain boundary phases and high temperature properties are reviewed. Cost-effective processing techniques for producing complex-shaped components, such as injection molding and sintered reaction bonded Si3N4 (SRBSN), are also addressed. Fracture mechanisms of differently-designed Si3N4 and their alloys became extremely important and interesting due to their unique microstructure.
|Number of pages||4|
|Journal||Key Engineering Materials|
|Publication status||Published - 1999 Jan 1|
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering