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首页> 外文期刊>Journal of Materials Research >Performance enrichment on tribological characteristics of powder metallurgy processed aluminium particulate composites by inclusion of rutile (TiO_2)
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Performance enrichment on tribological characteristics of powder metallurgy processed aluminium particulate composites by inclusion of rutile (TiO_2)

机译：金红石型（TiO_2）对粉末冶金铝颗粒复合材料摩擦学性能的影响

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摘要

A novel approach of powder metallurgy processed, cost-effective, environmentally friendly material, rutile, is proposed as an alternate to the conventional titanium-di-oxide (TiO_2) in the process of enhancing tribological behavior of aluminium (Al) based composites. Rutile, also possess good thermal stability which is essential for any material subjected to high temperature applications. The role of rutile (TiO_2) in the enrichment of tribological and microhardness properties of aluminium based metal matrix composites is presented. Al matrix composite was reinforced with rutile (TiO_2) to the proposed compositions (0, 4%, 8%, 12%, mass fraction) through powder metallurgy route. Wear test was done using pin-on-disc apparatus under dry sliding conditions. The preforms were then characterized using optical microscopy (OM), scanning electron microscope (SEM) and energy-dispersive x-ray spectrometer (EDS). Outcomes suggest that to increase in mass fraction of TiO_2, sintered density of the preforms approaches the theoretical density. OM images ratify uniform dispersion of TiO_2 implants within the Al matrix. TiO_2 offers promising wear and microhardness properties to the proposed composites which attribute to a high dislocation density of deformed planes. Plastic shearing, in conformity with the propagation of shear cracks broke particles as loose fragments which reduces the effective area of contact between the sliding surfaces and reduces loss of material in Al-12% TiO_2 composite. Mechanism of wear disclosed through SEM images and EDS patterns concludes that delamination and adhesion dominates the material removal.
机译：在增强铝（Al）基复合材料的摩擦学行为的过程中，提出了一种粉末冶金加工的，经济高效的，环境友好的材料金红石的新方法，以替代传统的二氧化钛（TiO_2）。金红石还具有良好的热稳定性，这对于经受高温应用的任何材料都是必不可少的。介绍了金红石（TiO_2）在丰富铝基金属基复合材料的摩擦学和显微硬度方面的作用。采用金红石（TiO_2）通过粉末冶金法将铝基复合材料增强到所建议的组成（质量分数为0、4％，8％，12％）。在干式滑动条件下使用销钉盘式设备进行磨损测试。然后使用光学显微镜（OM），扫描电子显微镜（SEM）和能量色散X射线光谱仪（EDS）对预成型件进行表征。结果表明，为了提高TiO_2的质量分数，预成型坯的烧结密度接近理论密度。 OM图像证实了TiO 2植入物在Al基体内的均匀分散。 TiO_2为提出的复合材料提供了有希望的耐磨性和显微硬度，这归因于变形平面的高位错密度。塑性剪切与剪切裂纹的扩展相一致，将颗粒破碎为松散的碎片，从而减小了滑动表面之间的有效接触面积，并减少了Al-12％TiO_2复合材料中的材料损失。通过SEM图像和EDS图案揭示的磨损机理得出的结论是，分层和附着力主导着材料的去除。

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  • 来源
    《Journal of Materials Research》 |2016年第16期|2445-2456|共12页
  • 作者

    C. Antony Vasantha Kumar; J. Selwin Rajadurai; S. Sundararajan;

  • 作者单位

    Department of Mechanical Engineering, Scad College of Engineering and Technology, Tirunelveli-627 414, Tamilnadu, India 3D/1, Kirubakaran Street, Military Line, Palayamkottai, Tirunelveli-627002, Tamilnadu, India;

    Department of Mechanical Engineering, Government College of Engineering, Tirunelveli-627 007, Tamilnadu, India;

    Department of Mechanical Engineering, Scad College of Engineering and Technology, Tirunelveli-627 414, Tamilnadu, India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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