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Effect of Al2O3 addition on hardness and wear behavior of Cu–Al2O3 electro-less coated Ag nanocomposite
Journal of Materials Research and Technology ( IF 6.4 ) Pub Date : 2020-03-20 , DOI: 10.1016/j.jmrt.2020.03.020
A.M. Sadoun , M.M. Mohammed , A. Fathy , Omyma A. El-Kady

The present paper represents the experimental examination on the additions of Al2O3 coated Ag percent on the properties of Cu–Al2O3 coated Ag nanocomposites. With the object of enhancement dispersion of high weight fraction of Al2O3 nanoparticles and wettability in Cu matrix, nano Al2O3 particles were electroless coated via Ag particles. Four different Al2O3 content, 3, 6, 9 and 12 wt.% are considered to highlight its effect on the characteristics of the fabricated nanocomposite. High-energy ball milling is applied for mixing powders and compaction and sintering are applying for consolidation. Microstructural explanations displayed a homogenous distribution of Al2O3. The relative density decreases with increasing the content of Al2O3 nanoparticles. In addition, microhardness is increased gradually via the addition of nano Al2O3 coated Ag. Sliding wear rate decrease via increasing the Al2O3 coated Ag nanocomposite content and increase with increasing the applied load. Also, the coefficient of friction decreases via increasing the nano Al2O3 coated Ag nanocomposite content and increasing applied load.



中文翻译:

Al 2 O 3的添加对Cu–Al 2 O 3化学镀银纳米复合材料硬度和磨损性能的影响

本论文代表了对Al 2 O 3包覆的Ag的添加量对Cu–Al 2 O 3包覆的Ag纳米复合材料性能的实验研究。为了增强Al 2 O 3纳米颗粒的高重量分数的分散性和在Cu基体中的润湿性,通过Ag颗粒对纳米Al 2 O 3颗粒进行化学镀。四种不同的Al 2 O 33、6、9和12重量%的含量被认为突出了其对所制备的纳米复合材料的特性的影响。高能球磨用于混合粉末,压实和烧结用于固结。微观结构解释显示Al 2 O 3均匀分布。相对密度随着Al 2 O 3纳米颗粒含量的增加而降低。另外,通过添加纳米Al 2 O 3包覆的Ag ,显微硬度逐渐增加。通过增加Al 2 O 3来降低滑动磨损率涂覆的Ag纳米复合材料的含量随着施加的载荷的增加而增加。而且,摩擦系数通过增加纳米Al 2 O 3包覆的Ag纳米复合材料含量和增加施加的载荷而降低。

更新日期:2020-03-20
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