论文部分内容阅读
The microalloying effect of yttrium on the crystallization behaviors of (Zr 0.525 Al 0.10 Ti 0.05 Cu 0.179 Ni 0.146 ) 100 x Y x , and (Zr 0.55 Al 0.15 Ni 0.10 Cu 0.20 ) 100 x Y x (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 Al 3 Zr 5 phase precipitations can be well explained by the mechanisms of nucleation and growth. Al 3 Zr 5 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 Y 2 O 3 particles and Al 3 Zr 5 phase is also discussed.
The microalloying effect of yttrium on the crystallization behaviors of (Zr 0.525 Al 0.10 Ti 0.05 Cu 0.179 Ni 0.146) 100 x Y x, and (Zr 0.55 Al 0.15 Ni 0.10 Cu 0.20) 100 x Y x (x = 0, 0.4, and 1, thus the two alloys systems were denoted as Zr52.5, Zr52.5Y0.4, Zr52.5Y1, and Zr55, Zr55Y0.4, Zr55Y1, respectively) were 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 Al 3 Zr 5 phase precipitations can be well explained by the mechanisms of nucleation and growth. Al 3 Zr 5 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 Y 2 O 3 particles and Al 3 Zr 5 phase is also discussed.