Development and characterization of low metallic friction composites filled with brass chips

IF 1.6 Q4 MATERIALS SCIENCE, COATINGS & FILMS Tribology - Materials, Surfaces & Interfaces Pub Date : 2022-05-10 DOI:10.1080/17515831.2022.2050605

F. Yusubov

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引用次数: 1

Abstract

ABSTRACT This research is focused on investigating new low metallic non-asbestos organic friction composite materials obtained by conventional powder metallurgy techniques. Three different composite mixtures were prepared by varying brass concentrations 1.5, 2.0 and 2.5 wt-% using the glycerin as a plasticizer. The prepared brake pad materials were subjected to density, hardness, thermal stability, friction and specific wear rate analysis. Tribological properties of friction specimen were studied on pin-on-disc type friction testing machine model MMW-1 using nominal contact pressure 7.69 MPa, sliding velocity 1.74 m/s and 1.57 km sliding distance conditions. Microstructural characterization of worn surfaces was carried out using scanning electron microscopy. Obtained test results indicate that brass chips have an important effect on improving tribo-performance. Physical–mechanical characterization of friction composites showed that the use of glycerin improves the physical properties of materials by improving the powder compressibility and reducing the structural defects formed by brass chips. GRAPHICAL ABSTRACT

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黄铜片填充低金属摩擦复合材料的研制与表征

摘要本研究的重点是研究传统粉末冶金技术制备的新型低金属无石棉有机摩擦复合材料。以甘油为增塑剂，通过改变黄铜的浓度1.5、2.0和2.5 wt-%，制备了三种不同的复合混合物。对制备的刹车片材料进行了密度、硬度、热稳定性、摩擦和比磨损率分析。在公称接触压力为7.69 MPa、滑动速度为1.74 m/s、滑动距离为1.57 km的MMW-1型销盘式摩擦试验机上，研究了摩擦试样的摩擦学性能。利用扫描电镜对磨损表面进行了显微组织表征。试验结果表明，黄铜屑对提高摩擦性能有重要作用。摩擦复合材料的物理力学表征表明，甘油的使用通过提高粉末压缩性和减少黄铜屑形成的结构缺陷来改善材料的物理性能。图形抽象

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Tribology - Materials, Surfaces & Interfaces MATERIALS SCIENCE, COATINGS & FILMS-

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2.80

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0.00%

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