PRECURSOR DERIVED Si-B-C-N CERAMICS-PROCESS AND PHASE STUDIES
|
|
| Hans Jürgen Seifert1) and Fritz Aldinger1) |
|
| 1) Max-Planck-Institut für Metallforschung and Institut für Nichtmetallische Anorganische Materialien |
|
| Precursor-derived Si-B-C-N ceramics are produced by thermolysis of specific element-organic polymers. The structure of the resulting amorphous ceramics is characterised by strong covalent bonds and closely related to the structural units of the polymers. To simulate the phase reactions during the materials crystallisation and thermal degradation CALPHAD-type calculations were carried out. Various types of phase diagrams and phase fraction diagrams were calculated and used to explain the high-temperature behaviour. |
|
| |
