In Ni-13.0at%Si-3.1at%Fe alloy, when γ/γ’ two-phase microstructure formed at 1123 K is
isothermally heated at 923 K which is lower than the temperature where the initial γ/γ’ microstructure
forms, the phase-separation of γ/γ’ precipitate phase occurs and γ particles newly appear in each
cuboidal γ’ precipitate. While in Ni-10.2at%Al-10.8at%Fe alloy, when γ/γ’ two-phase microstructure
formed at 1023 K is isothermally heated at 1123 K which is higher than the temperature where the
initial γ/γ’ microstructure forms, the phase-separation of γ’ precipitate phase takes place and γ
particles newly appear in each cuboidal γ’ precipitate. Such appearance of new γ particles in γ’
precipitates can be explained by the difference in the volume fraction of γ phase that should exist in
the γ/γ’ two-phase system depending on the heating temperature.
DOUBLE PHASE SEPARATION OF AQUEOUS TWO-PHASE COPOLYMERIZATION OF ACRYLAMIDE WITH QUATERNARY AMMONIUM CATIONIC MONOMERS
