In 2004, NIST researchers presented evidence that an isotropic non-crystalline metallic phase (dubbed "q-glass") could be grown from the melt. This phase is the first phase, or "primary phase," to form in the Al-Fe-Si system during rapid cooling. Interestingly, experimental evidence indicates that this phase forms by a first-order transition. Transmission electron microscopy (TEM) images show that the q-glass nucleates from the melt as discrete particles, which grow spherically with a uniform growth rate in all directions. The diffraction pattern shows it to be an isotropic glassy phase. Yet there is a nucleation barrier, which implies an interfacial discontinuity (or internal surface) between the glass and the melt.
In 2004 , NIST researchers presented evidence that an isotropic non - crystalline metallic phase ( dubbed " q - glass " ) could be grown from the melt . This phase is the first phase , or " primary phase , " to form in the Al - Fe - Si system during rapid cooling . Interestingly , experimental evidence indicates that this phase forms by a first - order transition . Transmission electron microscopy ( TEM ) images show that the q - glass nucleates from the melt as discrete particles , which grow spherically with a uniform growth rate in all directions . The diffraction pattern shows it to be an isotropic glassy phase . Yet there is a nucleation barrier , which implies an interfacial discontinuity ( or internal surface ) between the glass and the melt .
What shows that there is an inner surface between glass and melt?
What shows that there is an inner surface between glass and melt ?
nucleation barrier
nucleation barrier