Corrosion and mechanical behavior evaluation of in-situ synthesized Cu-TiB2 nanocomposite

H. Aghajani, S. A. N. Mehrabani, A. T. Tabrizi, Falih Hussein Saddam
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引用次数: 2

Abstract

In this paper, the synthesis of the copper matrix nanocomposite and the effect of adding TiB2 nanoparticles on the copper matrix was investigated. Three different amounts of TiB2 nanoparticles 5, 10, and 15 wt% were added and sintering was carried out at 900 oC for 4 hours under argon atmosphere. The phase formation of achieved nanocomposites was studied by X-ray diffractometer and the morphology of the synthesized samples was studied by field emission scanning electron microscopy and atomic force microscopy. The polarization and electrochemical impedance spectroscopy (EIS) at 3.5 wt% NaCl solution at room temperature was were carried out to evaluate the corrosion behavior of synthesized samples. Results show that adding the TiB2 nanoparticles decrease the corrosion resistance by the formation of galvanic couples, but the effect of amounts of porosities on the corrosion resistance is higher. It is revealed that the variation of the surface roughness is in direct relation to the value of polarization current density.
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原位合成Cu-TiB2纳米复合材料的腐蚀与力学行为评价
本文研究了铜基纳米复合材料的合成及其在铜基上添加TiB2纳米粒子的效果。分别加入5、10、15 wt%的TiB2纳米颗粒,900℃氩气下烧结4小时。用x射线衍射仪研究了合成的纳米复合材料的相形成,并用场发射扫描电镜和原子力显微镜研究了合成样品的形貌。采用极化谱和电化学阻抗谱(EIS)对合成样品在3.5 wt% NaCl溶液中的腐蚀行为进行了评价。结果表明,TiB2纳米颗粒的加入通过电偶的形成降低了材料的耐蚀性,但孔隙率对材料耐蚀性的影响较大。结果表明,表面粗糙度的变化与极化电流密度的大小有直接关系。
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