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Corrosion Characteristics of AZ31-B4C Composites
Transactions of the Indian Institute of Metals ( IF 1.5 ) Pub Date : 2022-08-13 , DOI: 10.1007/s12666-022-02709-z
Vikram P. Titarmare , Sudip Banerjee , Prasanta Sahoo

In this research, influence of boron carbide (B4C) particles on the corrosion behavior of magnesium metal matrix composite is examined. AZ31-B4C composites are fabricated through ultrasonic vibration-assisted stir casting process by reinforcing varying amount of boron carbide (0.5–2 wt.%) in AZ31 alloy. Characterizations of the composites are carried out using optical microscope , scanning electron microscope (SEM) and energy-dispersive spectroscope (EDS). The optical images show equiaxed orientation of grains in fabricated composites. SEM analysis confirms uniform distribution of reinforcement particles in composites. EDAX result confirms the inclusion of B4C particles in the Mg matrix. The microhardness of all composites and base alloy is measured using Vickers’s microhardness tester. Microhardness values are found to be increased with increase in wt.% of B4C nanoparticles. Electrochemical corrosion tests are carried out on AZ31-B4C metal matrix composites in 3.5% NaCl solution. AZ31-1B4C composite is found to be the most corrosion-resistant material among tested materials. Furthermore, corrosion morphology of samples is scrutinized under SEM and EDS.



中文翻译:

AZ31-B4C复合材料的腐蚀特性

在本研究中,研究了碳化硼 (B 4 C) 颗粒对镁金属基复合材料腐蚀行为的影响。AZ31-B 4 C 复合材料是通过超声振动辅助搅拌铸造工艺制造的,通过在 AZ31 合金中增强不同量的碳化硼(0.5-2 wt.%)。使用光学显微镜、扫描电子显微镜 (SEM) 和能量色散光谱仪 (EDS) 对复合材料进行表征。光学图像显示了制造复合材料中晶粒的等轴取向。SEM 分析证实了复合材料中增强颗粒的均匀分布。EDAX 结果证实包含 B 4Mg 基体中的 C 颗粒。使用 Vickers 的显微硬度计测量所有复合材料和基础合金的显微硬度。发现显微硬度值随着 B 4 C 纳米粒子wt.% 的增加而增加。AZ31-B 4 C金属基复合材料在3.5% NaCl溶液中进行电化学腐蚀试验。AZ31-1B 4 C 复合材料被发现是测试材料中最耐腐蚀的材料。此外,在 SEM 和 EDS 下仔细检查样品的腐蚀形态。

更新日期:2022-08-15
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