Study on preparation technology and microstructure of Ni20Zr10Al70 amorphous alloy

rapid solidification;  Ni-Zr-Al alloy;  Amorphous structure

Ni20Zr 10 Al70 amorphous alloy strip was successfully prepared by adjusting various process parameters by using rapid solidification single-roll planar flow casting technology. The amorphous structure of the alloy was verified by XRD, TEM and SAED, and the phase composition of the alloy at different solidification rates was analyzed. The results show that with the increase of solidification rate, the solidification of Ni20Zr 10Al70 alloy is first inhibited by the crystallization of NiAl3 phase and α-Al phase. With the further increase of solidification rate, the crystallization of Ni0.3 Al1.7Zr phase was also inhibited. The solidification rate is further increased, and the crystallization of Ni2Al3 phase is also inhibited, and finally a complete amorphous structure is obtained.