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Cu含量对新型AlNiZrCoYSi高熵非晶合金非晶形成能力与耐腐蚀性能的影响
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1.浙江大学 海洋学院;2.军事科学院 国防科技创新研究院

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国家重点研发计划项目(2018YFC1902400);国家自然科学基金(51975582);北京市自然科学基金(2212055)的资助


Effect of Copper Content on Corrosion Resistance and Glass-formingAbility of Novel AlNiZrCoYSi High Entropy Amorphous Alloy
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Zhejiang University, Ocean College

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    摘要:

    采用高真空电弧熔炼喷射成形技术制备了一种新型Al17.5Ni20Zr17.5Co20Y20Si5高熵非晶合金条带,并研究了Cu元素的添加及含量变化对Al17.5Ni20Zr17.5Co20Y20Si5高熵非晶合金耐腐蚀性能的影响。利用X射线衍射仪(XRD)、差示扫描量热仪(DSC)、显微硬度计分别研究了合金材料的非晶形成能力与硬度;通过极化曲线(Tafel)和Nyquist图等电化学方法考察了高熵非晶合金室温下在3.5 wt.% NaCl水溶液中的耐腐蚀性能。结果表明:四种(AlNiZrCo)75-xCuxY20Si5(x=0, 10, 14, 15)近等原子比高熵非晶合金均呈现典型的非晶态衍射峰,Cu含量对AlNiZrCoYSi高熵非晶合金的非晶形成能力影响不大,但会降低合金的抗腐蚀性能,且上述合金的维氏显微硬度均超过470 HV0.1。其中,Al17.5Ni20Zr17.5Co20Y20Si5高熵非晶合金的耐腐蚀性能最佳,其自腐蚀电位(Ecorr)为-0.248 V,自腐蚀电流密度(icorr)为1.63 μA/cm2,极化电阻(Rp)为24.56 kΩ.cm2,该材料在解决严苛海洋环境下防腐耐磨问题具有较大的应用潜力。

    Abstract:

    A new type of high entropy amorphous alloy (denoted as HEAA) ribbons Al17.5Ni20Zr17.5Co20Y20Si5 was prepared by injection in copper mould with arc melting. The effect of Cu content on corrosion resistance of the Al17.5Ni20Zr17.5Co20Y20Si5 HEAA was studied mainly by adding Cu element into the alloy. The glass-forming ability and hardness of the alloy were studied by X-ray diffraction (XRD), differential scanning calorimetry (DSC) and microhardness tester, respectively. The corrosion resistance of these ribbons in 3.5 wt.% NaCl corrosive solution at room temperature were investigated by potentiodynamic polarization curves (Tafel) and Nyquist plots. The results show that four kinds of (AlNiZrCo)75-xCuxY20Si5(x=0, 10, 14, 15) near equiatomic HEAA ribbons present typical amorphous diffraction peaks. The Cu content has little effect on the glass-forming ability of the AlNiZrCoYSi HEAA ribbons, but it will reduce the corrosion resistance. The Vickers microhardness of the above alloys is over 470 HV0.1. The corrosion resistance of the Al17.5Ni20Zr17.5Co20Y20Si5 HEAA ribbons is the finest. The corrosion potential (Ecorr) is -0.248 V, the corrosion-current density (icorr) is 1.63 μA / cm2, and the polarization resistance (RP) is 24.56 kΩ.cm2. This material has demanding application potential to solve the problem of anti-corrosion and wear resistance in harsh marine environment.

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张舒研,张志彬,王鑫,高洋洋,梁秀兵,王立忠. Cu含量对新型AlNiZrCoYSi高熵非晶合金非晶形成能力与耐腐蚀性能的影响[J].稀有金属材料与工程,2021,50(12):4587~4591.[Zhang Shuyan, Zhang Zhibin, Wang Xin, Gao Yangyang, Liang Xiubing, Wang Lizhong. Effect of Copper Content on Corrosion Resistance and Glass-formingAbility of Novel AlNiZrCoYSi High Entropy Amorphous Alloy[J]. Rare Metal Materials and Engineering,2021,50(12):4587~4591.]
DOI:10.12442/j. issn.1002-185X.20210175

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  • 收稿日期:2021-03-04
  • 最后修改日期:2021-03-07
  • 录用日期:2021-04-16
  • 在线发布日期: 2022-01-09
  • 出版日期: 2021-12-24