کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1481823 | 1510479 | 2012 | 5 صفحه PDF | دانلود رایگان |
Pt-capsules loaded with a Pt-coil and two crystalline seeds immersed into an andesitic melt were rapidly cooled from 1300 to 1100 °C with a rate of 3 °C/min at atmospheric pressure and air oxygen fugacity. Results show that the Pt-coil does not induce any heterogeneous crystallization process as well as iron diffusion process from the melt into the platinum substrate. In contrast, the presence of crystalline seeds in a solidifying andesitic melt significantly alters the phase assemblage, composition and texture of the new-forming crystals in response to a heterogeneous nucleation mechanism and the formation of metastable phases.
► Pt-substrates do not induce heterogeneous nucleation processes in andesitic melts.
► Crystalline substrate controls the composition of the new-forming crystals.
► Metastable crystal phases occur in response to a heterogeneous nucleation mechanism.
Journal: Journal of Non-Crystalline Solids - Volume 358, Issues 12–13, 1 July 2012, Pages 1624–1628