Common Phases for Zirconium Alloys

The following lists common phase names and the corresponding Thermo‑Calc database phase names for some key zirconium alloys.

Name in the Database	Common Name and Description
LIQUID	Liquid phase, which covers the melt of Zr alloys
BCC_A2	β zirconium, BCC type solid solution phase, which covers the high temperature (Zr) matrix phase
HCP_A3	α zirconium, Hcp type solid solution phase, which covers the low temperature (Zr) matrix phase
C14_Laves	Laves_C14 phase, which covers some Zr/Nb-compounds, high temperature Cr₂Zr, Fe₂Nb
C15_Laves	Laves_C15 phase, which covers some Zr-compounds, Cr₂Zr, Fe₂Zr etc.
C16_Theta	Laves_C36 phase, which covers MgNi₂, (Cu,Zn)₂Mg and (Al,Mg)₂Ca
FeNbZr_τ	(Zr,Nb)₂Fe ternary compound
Cr3Si_A15	Zr₃Sn, Nb₃Sn based solution phase, dissolving other elements
M5SI3_D88	η phase, Zr₅Sn₄ based Zr-rich solution phase, dissolving other elements
MZR3_E1A	FeZr₃ compound that forms in Zr-Fe based alloys
Fluorite	γ ZrO₂ phase, high temperature zirconia oxide phase, dissolving other elements
ZRO2_MONO	β ZrO₂ phase, intermediate temperature zirconia oxide phase
ZRO2_TETR	α ZrO₂ phase, low temperature zirconia oxide phase