The Effect of Growth Kinetics on the Formation of Peritectic Microstructures in a Sr(NO3)2–H2O System
| Autor: | Koji Maiwa, Hideo Kimura, Hiroaki Nakamura |
|---|---|
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Crystal Growth & Design. 15:4672-4675 |
| ISSN: | 1528-7505 1528-7483 |
| DOI: | 10.1021/acs.cgd.5b00951 |
| Popis: | We evaluated the growth and dissolution behavior of the primary α phase, Sr(NO3)2, and peritectic β phase, Sr(NO3)2·4H2O, coexisting in aqueous solutions above or below the peritectic temperature (Tp) in situ. Above Tp, when the two phases simultaneously grew in close proximity, the metastable β phase began to partially dissolve where it approached the α phase, although the remaining portion of the β phase was still growing. Overall, the growing α phase could not approach the dissolving face of the β phase; thus, a peritectic microstructure with the α phase enclosing the β phase was not formed. Conversely, below Tp, regardless of whether the metastable α phase was growing or dissolving, the stable β phase engulfed the α phase, resulting in a peritectic microstructure with the β phase enveloping the α phase. This demonstrated that it is necessary for the stable phase to dominate the metastable phase in growth kinetics for bringing about a peritectic microstructure consisting of the metastable phase in the ... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|