Release time:2024-03-09 Hits:
- Journal:China Foundry
- Place of Publication:沈阳
- Key Words:fused corundum; ceramic core; mineralization mechanism; silica powder
- Abstract:Fused corundum is a rather promising raw material for preparing an alumina-based ceramic
core due to its excellent high temperature resistance and chemical inertness. In this study, alumina-based
ceramic cores were prepared using fused corundum as the matrix material, and the effect of varying silica
powder contents on the properties of the alumina-based ceramic cores, including the sintering shrinkage, the
flexural strength, and the high temperature deformation was investigated. The mineralization mechanisms of
the silica on the alumina-based ceramic core were also analyzed. The optimum addition amount of silica in
this experiment is 8% in weight. At that moment, the aluminum-based core has both a low sintering shrinkage
coefficient of 0.66% and better properties: the room temperature flexural strength is 22.19 MPa, the high
temperature flexural strength is 21.54 MPa, the high temperature deformation is 0.93 mm, and the residual
flexural strength is 47.41 MPa.
- Indexed by:Journal paper
- Volume:18
- Issue:6
- Page Number:593-598
- Translation or Not:no
- Date of Publication:2021-11-01
- Included Journals:SCI
