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首页> 外文会议>International Conference on Management, Manufacturing and Materials Engineering >The Microstructure and Friction Properties of in-situ TiB_2 Particle-reinforced Al-10Sn Matrix Composites
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The Microstructure and Friction Properties of in-situ TiB_2 Particle-reinforced Al-10Sn Matrix Composites

机译：原位TIB_2粒子增强Al-10Sn基质复合材料的微观结构和摩擦性能

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摘要

To develop a new bearing material with promising tribological properties, low cost and without harmful elements, the TiB_2 particle-reinforced Al-10Sn matrix composites were fabricated by Mixed Salt Reaction synthesis process. The solidification microstructure of the composites was investigated by optical microscope and scanning electron microscope. The results indicate that the grains of α-Al matrix are fine, the TiB_2 particle size is less than 1.5μm, and the agglomeration of TiB_2 particles is mainly present at the boundary of α-Al phase, where the mechanical mixture of TiB_2 and β-Sn was observed. The oil lubricated sliding friction tests of composites and matrix alloy were conducted on a small thrust ring versus disc friction testing machine under different loads. The results indicate that, at low load (200N), both of composites and matrix alloy have a conspicuous running-in period and exhibit a better antifriction property with the coefficient of friction (hereafter COF) being 0.017 and 0.015, respectively. However, at high load (400N), the COF of composites and matrix alloy is approximately 0.080 and 0.17, with the frictional temperature being 58°C and 75°C, respectively. The composites exhibit higher bearing capacity and excellent antifriction.
机译：为了开发具有有希望的摩擦学性质，低成本和没有有害元件的新轴承材料，通过混合盐反应合成方法制造Tib_2粒子增强的Al-10Sn基质复合材料。通过光学显微镜和扫描电子显微镜研究了复合材料的凝固微观结构。结果表明，α-Al基体的晶粒是精细，TiB_2粒径小于1.5μm的，和TiB_2颗粒的团聚主要存在于α-Al相，其中TiB_2和β的机械混合物的边界-SN被观察到。在不同载荷下，在小推力环与椎间盘摩擦试验机上进行复合材料和基质合金的油润滑滑动摩擦试验。结果表明，在低载荷（200n）时，复合材料和矩阵合金两者都具有显着的运行时段，并且分别表现出具有0.017和0.015的摩擦系数（以下COF）的更好的抗抗抗率特性。然而，在高负荷（400n）中，复合材料的COF和基质合金约为0.080和0.17，摩擦温度分别为58°C和75°C。复合材料表现出较高的承载力和优异的抗抗率。

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