Microstructure, mechanical properties and corrosion properties of Mg-4Zn-xNi alloys for degradable fracturing ball applications

作者：Niu, Hao-yi; Deng, Kun-kun^*; Nie, Kai-bo; Cao, Fang-fang; Zhang, Xuan-chang; Li, Wei-guo

来源：Journal of Alloys and Compounds, 2019, 787: 1290-1300.

DOI：10.1016/j.jallcom.2019.02.089

• Mg-Zn-Ni alloys
• Microstructure
• Mechanical properties
• Corrosion

In order to find suitable degradable materials for the fracturing ball of wolf howl, a new as-cast Mg-4Zn-xNi (x = 0.5, 1, 2, 4 wt.%) alloys were prepared. Results indicated that the addition of Ni element lead to the formation of Mg2Ni phase in the Mg-4Zn-xNi alloys, which responsible for the increase of compressive strength and micro-hardness of Mg-Zn series alloy. Nevertheless, formation of Mg2Ni phase with high electrochemical potential can also accelerate the degradation rate of Mg-Zn series alloy. Accompanied with the increasing Ni content, the amount of Mg2Ni phase increases simultaneously, which aggravate galvanic corrosion and results in the higher degradation rate of Mg-Zn series alloys. The Mg-Zn-Ni alloy with moderate strength and higher degradation rate are obtained in present work, which is thought as an ideal candidate for the fracturing ball of wolf howl.

• 出版日期2019-5-30
• 单位太原理工大学