Abstract
Nucleation and crystallization of a Y-Si-Al-O-N glass containing 17 eq% N were studied using a two stage nucleation and growth treatment. Both classical and differential thermal analysis techniques were used and were found to be in close agreement. The results indicate that Tg+D40K and Tc2-40K to be the optimum nucleation and crystallization temperatures respectively, with a maximum volume fraction of crystalline phases and a smaller crystal size. The major crystalline phases present are mixtures of different forms of yttrium disilicate and silicon oxynitride. The activation energy for the crystallization process was found to be 834 KJ/mol. The influence of sample specific surface on the devitrification mechanisms have been estimated and bulk nucleation has been proposed to be the dominant nucleation mechanism.
| Original language | English |
|---|---|
| Pages (from-to) | 211-218 |
| Number of pages | 8 |
| Journal | Mechanical and corrosion properties. Series A, Key engineering materials |
| Volume | 99-100 |
| Publication status | Published - 1995 |
| Event | Proceedings of the 10th Irish Materials Forum Conference IMF10 - Coleraine, Irel Duration: 1 Sep 1994 → 1 Sep 1994 |