Vahid Zakeri Mehrabad, Ali Doniavi, R. Arghavanian, Majid Kavanlouei
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引用次数: 0
摘要
首次采用粉末冶金法制造出青铜/碳化硅/云母混合复合材料。混合物-工艺变量设计被应用于实验设计,并优化了复合材料成分以及生产工艺变量(压实压力和烧结温度),以获得优异的耐腐蚀性能。这包括混合不同成分的青铜、碳化硅和云母粉,然后在压制和烧结阶段对其施加不同的压力和温度,所有这些都要按照实验设计计划进行。使用配备了能量色散 X 射线分析仪的扫描电子显微镜和光学显微镜对样品的微观结构、化学成分和元素分布进行了检测。为了研究耐腐蚀性,在 3.5 wt.% 的氯化钠溶液中进行了电位极化测试和电化学阻抗谱分析。结果表明,在 Cu-10Sn 青铜基体中共同掺入 SiC 和云母颗粒可提高耐腐蚀性,这些颗粒之间存在协同效应。优化过程的结果表明,Cu-10Sn/9.85SiC/0.67mica 组成的复合材料具有最高的耐腐蚀性。这一结果随后通过实验程序得到了验证。
Corrosion resistance of powder metallurgy fabricated Cu–10Sn/SiC/mica hybrid composite
For the first time, bronze/SiC/mica hybrid composite has been manufactured using powder metallurgy method. Mixture – process variable design has been applied to design of experiments and optimization of the composite composition, as well as the production process variables (compaction pressure and sintering temperature) to attain superior corrosion resistance. This involved mixing different compositions of bronze, SiC, and mica powders, which were subsequently subjected to varied pressures and temperatures during the pressing and sintering stages, all in accordance with the experimental design plan. The microstructure, chemical composition, and elemental distribution of the samples were examined using scanning electron microscope equipped by energy dispersive X-ray analyzer, and an optical microscope. In order to study the corrosion resistance, potentiodynamic polarization test and electrochemical impedance spectroscopy were performed in 3.5 wt.% NaCl solution. The results revealed that co-incorporation of SiC and mica particles in Cu–10Sn bronze matrix increases the corrosion resistance, with a synergistic effect between these particles. The result of optimization process showed that the highest corrosion resistance could be achieved for the composite with the composition of Cu–10Sn/9.85SiC/0.67mica. This outcome was subsequently validated through experimental procedures.
期刊介绍:
Materials Testing is a SCI-listed English language journal dealing with all aspects of material and component testing with a special focus on transfer between laboratory research into industrial application. The journal provides first-hand information on non-destructive, destructive, optical, physical and chemical test procedures. It contains exclusive articles which are peer-reviewed applying respectively high international quality criterions.