The microalloying effect of yttrium on the crystallization behaviors of (Zr0.525Al0.10Ti0.05Cu0.179Ni0.146)100-x Yx, and (Zr0.55Al0.15-Ni0.10Cu0.20)100-x Yx (x=0, 0.4, and 1, thus the two alloy systems were denoted as Zr52.5, Zr52.5Y0.4, Zr52.5Y1, and Zr55, Zr55Y0.4, Zr55Y1, respectively) was studied. Transmission electron microscopy (TEM) results suggested that the crystalline phases were different in the two Zr-based alloys and with different yttrium contents. ZrNi-phase and Al3Zr5 phase precipitations can be well explained by the mechanisms of nucleation and growth. Al3Zr5 phase is mainly formed by a peritectic-like reaction, while ZrNi-phase by a eutectic reaction. The contents of elements Y, Al, and Ti may dominate the reaction types. The orientation relationship between Y2O3 particles and Al3Zr5 phase is also discussed.
The microalloying effect of yttrium on the crystallization behaviors of (Zr0.525Al0.10Ti0.05Cu0.179Ni0.146)100-x Yx, and (Zr0.55Al0.15-Ni0.10Cu0.20)100-x Yx (x=0, 0.4, and 1, thus the two alloy systems were denoted as Zr52.5, Zr52.5Y0.4, Zr52.5Y1, and Zr55, Zr55Y0.4, Zr55Y1, respectively) was studied. Transmission electron microscopy (TEM) results suggested that the crystalline phases were different in the two Zr-based alloys and with different yttrium contents. ZrNi-phase and Al3Zr5 phase precipitations can be well explained by the mechanisms of nucleation and growth. Al3Zr5 phase is mainly formed by a peritectic-like reaction, while ZrNi-phase by a eutectic reaction. The contents of elements Y, Al, and Ti may dominate the reaction types. The orientation relationship between Y2O3 particles and Al3Zr5 phase is also discussed.
下载: