Mechanical properties and corrosion resistance of a new Zr56Ni20Al15Nb4Cu5 bulk metallic glass with a diameter up to 25 mm

Mechanical properties and corrosion resistance of a new Zr56Ni20Al15Nb4Cu5 bulk metallic glass with a diameter up to 25 mm
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直径至25 mm的新型Zr56Ni20Al15Nb4Cu5大块金属玻璃的机械性能和耐腐蚀性能

DOI:
10.1016/j.jallcom.2013.11.111
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发表时间:
2014-12
影响因子:
6.2
通讯作者:
Akihiro Makino
Akihiro Makino
中科院分区:
材料科学2区
文献类型:
--
作者:
Yanhui Li;Wei Zhang;Fengxiang Qin;Akihiro Makino

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研究了 Zr56Ni25−xAl15Nb4Cux(x= 0–15) 大块金属玻璃 (BMG) 的玻璃形成能力 (GFA)、机械性能和耐腐蚀性能。用 5 at.% Cu 替代 Ni 通过降低液相线温度大大增加了基体合金的 GFA,而进一步添加 10–15 at.% Cu 则降低了 GFA。通过铜模铸造法可以获得最大临界直径达25mm的新型Zr56Ni20Al15Nb4Cu5BMG。具有最佳 GFA 的 BMG 具有良好的机械性能,即 1915 MPa 的高强度、5.5% 的大塑性应变以及 100 GPa 的杨氏模量。此外,BMG 分别在 H2SO4、HCl 和 NaCl 溶液中表现出优异的耐腐蚀性,这由较高的腐蚀电位和点蚀电位表明。
The glass-forming ability (GFA), mechanical properties and corrosion resistance of Zr56Ni25−xAl15Nb4Cux(x= 0–15) bulk metallic glasses (BMGs) were investigated. Substitution of 5 at.% Cu for Ni greatly increases the GFA of the base alloy by lowering the liquidus temperature, while further addition of 10–15 at.% Cu decreases the GFA. A new Zr56Ni20Al15Nb4Cu5BMG with a largest critical diameter up to 25 mm can be obtained by copper mold casting method. The BMG with best GFA possesses good mechanical properties, i.e., high strength of 1915 MPa, large plastic strain of 5.5%, together with Young’s modulus of 100 GPa. In addition, the BMG exhibits excellent corrosion resistance in H2SO4, HCl, and NaCl solutions, respectively, as indicated by the nobler corrosion potential and pitting potential.
DOI: 10.1063/1.3606642
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