Enhancement of glass-forming ability and corrosion resistance of Zr-based Zr-Ni-Al bulk metallic glasses with minor addition of Nb
Enhancement of glass-forming ability and corrosion resistance of Zr-based Zr-Ni-Al bulk metallic glasses with minor addition of Nb
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DOI：
10.1063/1.3606642
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发表时间：
2011-07
影响因子：
3.2
通讯作者：
Yanhui Li;Wei Zhang-;C. Dong;C. Qin;J. Qiang;A. Makino;A. Inoue
中科院分区：
文献类型：
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作者：
Yanhui Li;Wei Zhang-;C. Dong;C. Qin;J. Qiang;A. Makino;A. Inoue
在 Zr-Ni-Al-Nb 体系中发现了具有高玻璃形成能力 (GFA) 的无铜 Zr 基块体金属玻璃 (BMG)。少量添加 Nb 可以显着提高 Zr-Ni-Al 合金的 GFA，从而提高玻璃化转变温度，降低熔化温度和液相线温度。通过铜模铸造验证，Zr-Ni-Al-Nb BMG 的临界样品直径为 15-20 mm。它们在含氯离子溶液中表现出优异的耐腐蚀性，明显优于其他已知的超高 GFA 锆基 BMG。结果表明，高保护性的富含 Zr、Al 和 Nb 的表面膜的形成是其高耐腐蚀性的原因。 BMG还具有1786-1847 MPa的高压缩屈服强度、1.6-3.2%的大塑性应变和0.365-0.371的高泊松比。
Cu-free Zr-based bulk metallic glasses (BMGs) with high glass-forming ability (GFA) have been discovered in the Zr-Ni-Al-Nb system. The GFA of Zr-Ni-Al alloys can be significantly enhanced by the minor addition of Nb, which increases the glass transition temperature, and lowers the melting and liquidus temperatures. The Zr-Ni-Al-Nb BMGs have critical sample diameters of 15–20 mm as verified by a copper mold casting. They exhibit excellent corrosion resistance in chloride-ion-containing solutions, which is considerably better than that of other known Zr-based BMGs with superhigh GFA. It was revealed that the formation of highly protective Zr-, Al-, and Nb-enriched surface film is responsible for the high corrosion resistance. The BMGs also possess high compressive yield strength of 1786–1847 MPa, large plastic strain of 1.6–3.2%, and a high Poisson’s ratio of 0.365–0.371.