Abstract
The effect of a partial or full replacement of yttrium by ytterbium on the crystallization of an oxynitride B-phase parent glass with composition (e/o) 35Y/Yb:45Si:20Al:83O:17N has been investigated by thermal analysis, X-ray diffractometry and analytical transmission electron microscopy. Single B-phase formation was extended to higher temperatures by low ytterbium:yttrium ratios, while a full replacement resulted in a two-phase B- and J-phase glass-ceramic. The B-phase crystals took up a substantial range of composition that was dependent on the substitution level, and yttrium/ytterbium was always clearly anti-correlated with silicon. Some aluminum was accommodated in the dendritic J-phase crystals, and their yttrium/ytterbium content varied between 64 and 79 cation%.
| Original language | English |
|---|---|
| Pages (from-to) | 1566-1573 |
| Number of pages | 8 |
| Journal | Journal of the American Ceramic Society |
| Volume | 90 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - May 2007 |