Effect of enthalpy relaxation rejuvenation on microstructure and corrosion resistance of a Zr-based bulk metallic glass

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids Pub Date : 2024-10-11 DOI:10.1016/j.jnoncrysol.2024.123259

J. Jiang , H.J. Sun , W.H. Zhou , Z.B. Wang , J. Sun , Y. Li

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引用次数: 0

Abstract

Enthalpy relaxation rejuvenation is a recently developed promising method for modulating mechanical properties of metallic glasses (MGs), but its effect on corrosion resistance, which is important for applications of MGs, has never been studied before. This paper studies its effects on microstructure and corrosion of a Zr_52.5Cu_17.9Ni_14.6Al₁₀Ti₅ bulk metallic glasses (BMGs) in 3.5 wt% NaCl solution. The results show that the system energy increases after rejuvenation, but the content of local ordering structure, which results in chemical inhomogeneity, is almost changeless, as compared to the structure-relaxed state. The enthalpy relaxation rejuvenation has minimal effects on passivation and pitting corrosion of structure-relaxed samples, with no apparent adverse effects. Since pitting corrosion of Zr_52.5Cu_17.9Ni_14.6Al₁₀Ti₅ BMGs is dominated by pit initiation and chemical inhomogeneity could initiate pitting corrosion, this minimal effect is attributed to the nearly unchanged chemical inhomogeneity of rejuvenated samples. This finding provides valuable information for industrial applications of Zr-based BMGs.

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焓弛豫年轻化对 Zr 基块状金属玻璃微观结构和耐腐蚀性的影响

焓弛豫再生是最近开发的一种用于调节金属玻璃（MGs）机械性能的有前途的方法，但它对耐腐蚀性的影响却从未被研究过，而耐腐蚀性对 MGs 的应用非常重要。本文研究了在 3.5 wt% 的 NaCl 溶液中对 Zr52.5Cu17.9Ni14.6Al10Ti5 块状金属玻璃（BMGs）的微观结构和腐蚀性的影响。结果表明，与结构松弛状态相比，系统能量在年轻化后有所增加，但导致化学不均匀性的局部有序结构含量几乎没有变化。焓松弛年轻化对结构松弛样品的钝化和点腐蚀影响很小，没有明显的不利影响。由于 Zr52.5Cu17.9Ni14.6Al10Ti5 BMG 的点蚀主要是由凹坑引发的，而化学不均匀性可能会引发点蚀，因此这种微小的影响归因于年轻化样品的化学不均匀性几乎没有改变。这一发现为 Zr 基 BMG 的工业应用提供了有价值的信息。

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来源期刊

Journal of Non-crystalline Solids 工程技术-材料科学：硅酸盐

CiteScore

6.50

自引率

11.40%

发文量

576

审稿时长

35 days

期刊介绍： The Journal of Non-Crystalline Solids publishes review articles, research papers, and Letters to the Editor on amorphous and glassy materials, including inorganic, organic, polymeric, hybrid and metallic systems. Papers on partially glassy materials, such as glass-ceramics and glass-matrix composites, and papers involving the liquid state are also included in so far as the properties of the liquid are relevant for the formation of the solid. In all cases the papers must demonstrate both novelty and importance to the field, by way of significant advances in understanding or application of non-crystalline solids; in the case of Letters, a compelling case must also be made for expedited handling.