<strong>Cr</strong>对<strong>FeWB</strong>块体金属玻璃热稳定性和耐腐蚀性能的影响

doi:10.11900/0412.1961.2024.00168

金属学报

2026, Vol. 62

Issue (3): 458-466 DOI: 10.11900/0412.1961.2024.00168

研究论文

本期目录 | 过刊浏览

Cr对FeWB块体金属玻璃热稳定性和耐腐蚀性能的影响

肖思明¹, 刘天豪², 苏辰¹, 郭胜锋¹(

)

^1.西南大学材料与能源学院重庆 400715
^2.重庆川仪自动化股份有限公司重庆 401121

Effect of Chromium on Thermal Stability and Corrosion Resistance in FeWB Bulk Metallic Glasses

XIAO Siming¹, LIU Tianhao², SU Chen¹, GUO Shengfeng¹(

)

^1.School of Materials and Energy, Southwest University, Chongqing 400715, China
^2.Chongqing Chuanyi Automation Co. Ltd., Chongqing 401121, China

引用本文:

肖思明, 刘天豪, 苏辰, 郭胜锋. Cr对FeWB块体金属玻璃热稳定性和耐腐蚀性能的影响[J]. 金属学报, 2026, 62(3): 458-466.
Siming XIAO, Tianhao LIU, Chen SU, Shengfeng GUO. Effect of Chromium on Thermal Stability and Corrosion Resistance in FeWB Bulk Metallic Glasses[J]. Acta Metall Sin, 2026, 62(3): 458-466.

全文: PDF(2027 KB) HTML

摘要:

块体金属玻璃属于热力学亚稳态合金，其非晶结构在环境温度超过玻璃转变温度时易失稳，从而导致其优异性能退化。提高非晶合金的热稳定性对于维持其综合性能至关重要。本工作在Fe₅₉W₂₃B₁₈ (原子分数，%)块体金属玻璃基础上，引入Cr元素，制备了一系列(Fe_{1 -}_x Cr _x )₅₉W₂₃B₁₈ (x = 0、0.05、0.1、0.15、0.2、0.25)块体金属玻璃。结果表明，Cr元素显著提高了该块体金属玻璃的热稳定性，其中(Fe_0.9Cr_0.1)₅₉W₂₃B₁₈金属玻璃的玻璃转变温度为954 K，晶化起始温度为994 K，极高的热稳定性主要源于Cr的引入使得体系更容易形成强过渡金属-类金属共价键(Cr—B键)，增强了原子间的相互作用。此外，大量类Fe₂₃B₆的中程序结构也进一步提高了体系的稳定性。Cr元素进一步降低了该金属玻璃体系的自腐蚀电流密度，这主要得益于Cr促进了合金表面稳定钝化膜的形成。然而，Cr₂O₃的抗点蚀能力弱于WO₃，导致合金的抗点蚀能力有所下降。

关键词 ：铁基块体金属玻璃, 热稳定性, 耐腐蚀性能

Abstract：

Bulk metallic glasses are thermodynamically metastable alloys with an amorphous structure that becomes increasingly unstable at temperatures above their glass transition temperature, leading to degradation of their advantageous properties. Thus, enhancing the thermal stability of bulk metallic glasses is critical for preserving their exceptional characteristics. Recently, our team successfully synthesized a Fe₅₉W₂₃B₁₈ (atomic fraction, %) bulk metallic glass that exhibits high thermal stability and further developed a series of (Fe_{1 -}_x Cr _x )₅₉W₂₃B₁₈ (x = 0, 0.05, 0.1, 0.15, 0.2, 0.25) bulk metallic glasses by incorporating Cr in this study. Results show that Cr addition notably enhanced the thermal stability of FeWB bulk metallic glasses, with (Fe_0.9Cr_0.1)₅₉W₂₃B₁₈ achieving a glass transition temperature of 954 K and an crystallization onset temperature of 994 K. This substantial increase in thermal stability is primarily attributed to Cr playing a role in the formation of strong metal-metalloid covalent bonds (Cr—B bonds), which enhance interatomic interactions. Additionally, the substantial presence of an Fe₂₃B₆-like medium-range order structure further stabilized the system. Furthermore, the corrosion resistance of the FeWB bulk metallic glass system was considerably improved by Cr addition, as indicated by an approximately 10-fold reduction in the corrosion current density. This enhancement can be primarily attributed to the formation of a dense Cr₂O₃ passivation layer on the alloy surface. However, the reduced pitting potential of Cr₂O₃ relative to WO₃ led to a slight decrease in the pitting corrosion resistance of the FeCrWB alloys.

Key words： Fe-based bulk metallic glass thermal stability corrosion resistance

收稿日期: 2024-05-17

ZTFLH:

TG113.2

基金资助:国家自然科学基金项目(52071276)

通讯作者: 郭胜锋，sfguo@swu.edu.cn，主要从事非晶合金、高熵合金研究

Corresponding author: GUO Shengfeng, professor, Tel: 13500330725, E-mail: sfguo@swu.edu.cn

作者简介: 肖思明，男，1995年生，博士生

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图1 不同Cr含量(Fe1 - x Cr x )59W23B18合金棒材(直径1 mm)的XRD谱，及Cr0.1合金的背散射电子像、高分辨TEM像和选区电子衍射花样

图2 直径为1.5 mm的Cr0和Cr0.05合金的XRD谱

图3 不同Cr含量FeCrWB合金的DTA曲线及典型铁基块体金属玻璃的玻璃转变温度(Tg)和结晶起始温度(Tx)[11,20~36]

表1 不同Cr含量FeCrWB合金的热稳定性参数和显微硬度

图4 不同铁基块体金属玻璃的显微硬度[9,11,33,36,37,39~42]，及不同金属玻璃Tg3/2 / Vm与σ的关系[43,44] (Vm为合金的摩尔体积，σ为断裂强度)

图5 不同Cr含量FeCrWB合金在3.5%NaCl溶液中的电化学阻抗谱(EIS)以及等效电路图

表2 FeCrWB合金在3.5%NaCl溶液中的相关电化学参数

图6 不同Cr含量FeCrWB合金在3.5%NaCl溶液中的动电位极化曲线，及Cr0和Cr0.1合金在0.8 V恒电位下电流密度与时间的关系、电流密度与时间的双对数曲线、空间电荷电容与电位之间的关系

图7 Cr0和Cr0.1合金钝化膜中的W4f XPS

图8 典型铁基金属玻璃和不锈钢在3.5%NaCl溶液中的点蚀电位和钝化区间[42,49~52]

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