Abstract

Al composites are of interest due to their appropriate ratio of strength to weight. In our research, an Al/Co₃O₄ nanocomposite was generated using a sintering technique. The powders of Al with various Co₃O₄ nanoparticle contents (0wt%, 0.5wt%, 1.0wt%, 1.5wt%, 2.0wt%, and 2.5wt%) were first blended using planetary milling for 30 min, and compressed in a cylindrical steel mold with a diameter of 1 cm and a height of 5 cm at a pressure of 80 MPa. The samples were evaluated with X-ray diffractometry (XRD), scanning electron microscopy (SEM), Vickers hardness, and a vibrating sample magnetometer (VSM). Although the crystallite size of the Al particles remained constant at 7–10 nm, the accumulation of nanoparticles in the Al particle interspace increased the structural tensile strain from 0.0045 to 0.0063, the hardness from HV 28 to HV 52 and the magnetic saturation from 0.044 to 0.404 emu/g with an increase in Co₃O₄ nanoparticle content from 0wt% to 2.5wt%.

中文翻译：

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添加Co 3 O 4纳米颗粒引起的残余结构应变对粉末冶金生产的Al / Co 3 O 4纳米复合材料的结构，硬度和磁性的影响

摘要

铝复合材料由于强度与重量的适当比例而备受关注。在我们的研究中，使用烧结技术生成了Al / Co ₃ O ₄纳米复合材料。具有各种Co ₃ O ₄的Al粉末首先使用行星式研磨将纳米颗粒含量（0wt％，0.5wt％，1.0wt％，1.5wt％，2.0wt％和2.5wt％）混合30分钟，然后在直径1 cm的圆柱形钢模中压缩在80兆帕的压力下高度为5厘米。用X射线衍射仪（XRD），扫描电子显微镜（SEM），维氏硬度和振动样品磁力计（VSM）对样品进行评估。尽管Al粒子的微晶尺寸在7-10 nm处保持恒定，但是Al粒子间隙中纳米粒子的积累使结构拉伸应变从0.0045增至0.0063，硬度从HV 28提升至HV 52，磁饱和度从0.044提升至HV 52。 0.404 emu / g，Co ₃ O ₄纳米颗粒含量从0wt％增加到2.5wt％。