| Title | Oxidation resistance of pressureless-sintered SiC-AlN-Re2O 3 composites Obtained without powder bed |
|---|---|
| Publication Type | Presentazione a Congresso |
| Year of Publication | 2009 |
| Authors | Magnani, G., Antolini F., Beaulardi L., Burgio F., and Mingazzini C. |
| Conference Name | Ceramic Engineering and Science Proceedings |
| Conference Location | Daytona Beach, FL |
| Keywords | AlN, Alumina, Ceramic materials, Corrosion, Corrosion fatigue, Cost-effective methods, Grain boundaries, Grain-boundary phasis, Interfacial reactions, Lutetia, oxidation, Oxidation behaviours, Oxidation resistance, Oxygen, Powder beds, Powders, Pressureless-sintered, Rare earth elements, Rare-earth oxides, Rate-determining steps, Silica, Silica aluminas, Silicon carbide, Sintered alumina, Sintered densities, Sintered samples, Sintering, Solid solutions, Surface diffusion, Surface reactions, Temperature ranges, Well-dispersed |
| Abstract | Oxidation resistance of SiC-AlN-Re2O3 composites (SiC 50%wt-AlN 50%wt) pressureless-sintered with an innovative and cost-effective method is reported, Yttria, Lutetia, Ytterbia and Erbia were tested as sintering-aids in this pressureless-sintered process which does not require the use of the powder bed to protect samples during the heat treatments, Sintered density was always >95%T.D. and microstructure was mainly composed by 2H SiC-AlN solid solution with well-dispersed grain boundary phases. The sintered samples, after oxidation in the temperature range 1200-1200°C over a period of time of 200h, showed a parabolic oxidation behaviour with diffusion of oxygen through the silica-based surface and interfacial reactions silica-alumina and silica-rare-earth oxides as rate-determining steps. |
| URL | https://www.scopus.com/inward/record.uri?eid=2-s2.0-62849096844&partnerID=40&md5=7fd68c13031510d9a52115a20eb8e279 |
| Citation Key | Magnani200921 |
