Abstract
The morphological development of oxide scales formed on a low Al substituted β-sialon (z = 0.2) oxidized for time periods up to 1024 h at 1350 °C is discussed in relation to oxidation kinetics. The oxidation process is observed to be accompanied by changes in both the phase assemblage of the external layers and their morphology. Thus as the time of oxidation increases beyond 64 h the cristobalite-β-yttrium disilicate phase assemblage changes to cristobalite plus β- & γ-yttrium disilicate. In addition to the changes observed for the surface layers, differences are observed in the morphologies of the polished cross-sections. These changes are consistent with an order of magnitude decrease in oxidation rate.
| Original language | English |
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| Title of host publication | Key Engineering Materials |
| Publisher | Publ by Trans Tech Publ |
| Pages | 283-288 |
| Number of pages | 6 |
| Volume | 89-91 |
| ISBN (Print) | 0878496688, 9780878496686 |
| Publication status | Published - 1994 |
| Event | Proceedings of the International Conference on Silicon Nitride-Based Ceramics - Stuttgart, Ger Duration: 4 Oct 1993 → 6 Oct 1993 |
Conference
| Conference | Proceedings of the International Conference on Silicon Nitride-Based Ceramics |
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| City | Stuttgart, Ger |
| Period | 4/10/93 → 6/10/93 |