The phrase "appearance of phase" is correct and usable in written English.
It can be used in contexts related to science, particularly in discussions about physical states, phases of matter, or visual representations of phases.
Example: "The appearance of phase changes in the material can be observed under varying temperature conditions."
Alternatives: "phase manifestation" or "phase representation".
When temperature was above the phase separation temperature, i.e. cloud point (Tc) for some PMMA/SAN blends, the slope of plotting logG′ versus logω decreased at low frequencies (terminal region), indicating the appearance of phase-separation and existence of heterogeneous structure.
In the case of an oriented material, it is shown that indentation hardness is capable to detect the gradual appearance of phases of intermediate order.
The enrichment of the spinel in aluminum cations, and the metal in magnesium is confirmed by the appearance of phases of aluminum oxide and magnesium aluminum intermetallics in the X-ray diffraction spectra.
A closer examination of the results above reveals that (1) the domains coarsen through collision and coalescence and (2) the appearance of phase-separated state invariably coincides with the swollen, tense state of the GUV during the cyclical swell burst processes.
But when the sintering pressure reaches 4 GPa, the atomic diffusion is hindered, leading to the rise of LaNi5 phase, appearance of MgNi2 phase, and decrease of Ce2Ni7-type and Pr5Co19-type phases.
The appearances of phase separation and especially nanocrystallization reduce the thermal stability of the glass since they create advantages in chemical composition and topological structure for the primary crystalline phase to nucleate and grow.
Specific isothermal experiments combined with simulations revealed the existence of two potential Ga diffusion paths during indirect reversion: (i) from the α′ phase to the δ phase and (ii) from a new transient β′ phase, preceding the appearance of β phase of pure Pu, to the δ phase.
At the same time, it seems there is a direct relationship between zeta potential of the existed phase and the appearance of new phase.
In general, the first antibody to appear in acute Q fever patients is IgM phase II, followed by a more or less simultaneous IgG phase II and IgM phase I response and subsequent appearance of IgG phase I antibodies (see figure 2) [ 13].
