Purpose

This paper aims to improve the tribological properties of aluminum alloys and reduce their wear rate.

Design/methodology/approach

Carbon is placed in the model at room temperature, pour 680°C of molten aluminum into the pressure chamber, and then pressed it into the mold containing carbon felt through a die casting machine, and waited for it to cool, which used an injection pressure of 52.8 MPa and held the same pressure for 15 s.

Findings

The result indicated that the mechanical properties of matrix and composite are similar, and the compressive strength of the composite is only 95% of the matrix alloy. However, the composite showed a low friction coefficient, the friction coefficient of Gr/Al composite is only 0.15, which just is two-third than that of the matrix alloy. Similarly, the wear rate of the composite is less than 4% of the matrix. In addition, the composite can avoid severe wear before 200°C, but the matrix alloy only 100°C.

Originality/value

This material has excellent friction properties and is able to maintain this excellent performance at high temperatures.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-10-2019-0454/

中文翻译：

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压铸法制备Al-Si /石墨复合材料的高温磨损及其机理研究

目的

本文旨在改善铝合金的摩擦学性能并降低其磨损率。

设计/方法/方法

将碳在室温下放入模型中，将680°C的熔融铝倒入压力室中，然后通过压铸机将其压入包含碳毡的模具中，并等待其冷却，然后使用注射压力保持52.8 MPa的压力，并保持相同的压力15 s。

发现

结果表明，基体与复合材料的力学性能相似，复合材料的抗压强度仅为基体合金的95％。但是，该复合材料的摩擦系数较低，Gr / Al复合材料的摩擦系数仅为0.15，仅为基体合金的三分之二。同样，复合材料的磨损率小于基体的4％。此外，复合材料可以避免200°C之前的严重磨损，而基体合金只有100°C。

创意/价值

这种材料具有出色的摩擦性能，并且能够在高温下保持这种出色的性能。

同行评审

本文的同行评审历史记录可在以下网址获得：https://publons.com/publon/10.1108/ILT-10-2019-0454/