The phrase "a primary phase in" is correct and usable in written English.
It can be used when discussing a significant stage or step in a process, development, or timeline.
Example: "The research project represents a primary phase in our efforts to combat climate change."
Alternatives: "a key stage in" or "an essential step in".
We find that for ∆T < 707 K, the α-(Fe,Si) phase has a higher nucleation rate compared to that of the 1 13 phase, and it is a primary phase in a slow solidification process.
As the undercooled temperature change, ∆T, is less than 707 K, the α-(Fe,Si) phase has a higher nucleation rate compared to that of the 1 13 phase on the free surface of the ribbon, and it is therefore a primary phase in a slow solidification process.
The life cycle of this soil-borne pathogen can be divided into two phases: a primary phase in which events are confined to the root hairs and a secondary phase that occurs in the cortex and the stele of the hypocotyl and roots of the infected plants.
Analysis of the microstructure by X-ray diffractometry, scanning electron microscopy and transmission electron microscopy indicates that it consisted of β-Ti dendrites as a primary phase and Ti (Fe, In and/or Nb) (B2) + β-Ti (A2) as eutectic phase.
Primary phase in the slurry thus produced has attained an ideally globular morphology after isothermal holding at 620 °C for 30 s.
The Nb5Si3 silicide in the β and γ forms was the primary phase in the Nb 24Ti 18Si 5Cr 5Al 5Hf 2Mo and Nb 24Ti 18Si 5Cr 5Al 5Hf 5Sn 2Mo alloys studied in this work.
The results show that γ-Fe solid solution, Nd2Fe14B compound and the metastable Nd2Fe17Bx compound were solidified as primary phase in sequence of increasing bulk undercooling level.
It was found that Nb-rich β-Ti dendrites were the primary phase in the alloy, and extra discontinuous island-like Ti2Cu phase was also produced in the glassy matrix.
Results showed that addition of 1.5%Cr has little effect on the microstructure, while alloying with 5.6%Cr significantly increased the volume fraction of Ni2Si primary phase in the Cr-alloyed Ni2Si/NiSi coatings.
The primary phases in the film were identified using XRD and were found to be in agreement with the equilibrium phase diagram.
