Dry sliding wear behaviour of co-continuous ceramic foam/aluminium alloy interpenetrating composites produced by pressureless infiltration
Dry sliding wear behaviour of co-continuous ceramic foam/aluminium alloy interpenetrating composites produced by pressureless infiltration
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DOI：
10.1016/j.wear.2011.12.008
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发表时间：
2012-02-15
期刊：
影响因子：
5
通讯作者：
Higginson, Rebecca
中科院分区：
文献类型：
--
作者：
Liu, Jing;Binner, Jon;Higginson, Rebecca
金属-陶瓷互穿复合材料(IPC)由离散的金属相和陶瓷相组成的三维连续基体组成。其目标是开发出比传统MMCs更优越的多功能性能，以期将这些复合材料用于航空航天、汽车和国防等行业的耐磨、电子部件和轻质结构部件等应用。本文采用无压浸渗技术，通过将熔融的铝合金渗透到由氧化铝、莫来石和尖晶石制成的一系列凝胶注模泡沫陶瓷中来制备IPC。确定了不同原料体系的加工条件。在干摩擦条件下测量了复合材料的磨损率。对其磨损机理进行了研究，确定了泡沫密度和泡孔尺寸对磨损性能的影响。结果表明，氧化铝或螺旋管状增强体的IPC性能优于莫来石增强体。研究还发现，所有以泡沫为基础的IPC的耐磨性都是通过渗透陶瓷粉末(C)2011 Elsevier B.V.制成的MMC的两倍。
Metal-ceramic interpenetrating composites (IPCs) consist of 3D-continuous matrices of discrete metal and ceramic phases. The goal is to develop superior multifunctional properties compared with traditional MMCs with a view to using these composites in applications including wear resistance, electrical components and light weight structural parts in industries including aerospace, automotive and defence, amongst others. In this paper, a pressureless infiltration technique was used to produce IPCs by infiltrating molten aluminium alloys into a range of gel-cast ceramic foams produced from alumina, mullite, and spinel. Processing conditions for different material systems were determined. The wear rates of the composites were measured under dry sliding conditions. The wear mechanism was investigated and the effects of the foam density and cell size on the wear properties were determined. It was found that the alumina or spinet reinforcement-based IPCs performed better than those based on mullite. It was also found that all the foam-based IPCs were up to twice as wear resistant as MMCs made by infiltrating a bed of ceramic powder (C) 2011 Elsevier B.V. All rights reserved.