Attractive characteristics like light weight, good corrosion resistance, low expansion coefficient, high strength, near-infinite recyclability, flame retarding properties, casting ease for mass production, and low cost availability make aluminum (Al) a popular material choice for automotive and aerospace sector. It is more so in the scenario when the transportation field is facing the challenges of fuel economy, reduced vehicle emissions, and increased vehicle safety at competitive cost. However, the use of Al and its alloys is restricted due to poor resistance to wear, seizure, and galling.^1,2 European automotive industry is using new design concepts like body in white and super light car which focus on producing lightweight vehicles for space and fuel economy. Al alloys of 2xxx, 5xxx, 6xxx, and 7xxx series designation are in large usage due to high strength formability, damage tolerance, fatigue resistance, energy absorption, and excellent crash characteristics. Typical automotive applications include power train components, chassis and suspension, and body parts like doors, bumpers, and interiors.³ The need of different property combinations such as high specific strength and ductility for aerospace and automobile field, low coefficient of thermal expansion (CTE) and high thermal stability for elevated temperature applications, high wear resistance, high specific stiffness, and corrosion resistance for defense sector can be fulfilled by metal matrix composites (MMCs). It is because metals and ceramics have vastly different physical, thermal, electrical, and mechanical properties. Due to possible tailored property combinations, MMCs are now being commercially made available and used on increasing scale. Especially, particulate-reinforced Al-based MMCs are of interest and account for majority of the annual MMC produced and utilized on volume and mass basis. It has been reported that different composites mostly Al-based now constitute more than 50% of the Boeing 787 aircrafts and 25% of Airbus A380.

中文翻译：

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颗粒增强铝金属基纳米复合材料的摩擦学表征：综述

重量轻，良好的耐腐蚀性，低膨胀系数，高强度，几乎无限的可回收性，阻燃性，易于大规模生产的铸造以及低成本可获得性等吸引人的特性，使铝（Al）成为汽车和航空航天领域的流行材料选择。在运输领域面临燃油经济性，减少车辆排放以及以有竞争力的成本提高车辆安全性的挑战时，情况尤其如此。但是，由于其耐磨性，抗咬合性和耐磨损性差，限制了Al及其合金的使用。^1,2欧洲汽车工业正在使用新的设计概念，例如白色和超轻型汽车的车身，其重点是为空间和燃油经济性生产轻型汽车。2xxx，5xxx，6xxx和7xxx系列名称的铝合金由于具有高强度可成形性，耐损伤性，耐疲劳性，能量吸收性和出色的耐撞特性而被大量使用。典型的汽车应用包括动力总成组件，底盘和悬架以及车门，保险杠和内饰等车身部件。³需要不同的特性组合，例如用于航空航天和汽车领域的高比强度和延展性，用于高温应用的低热膨胀系数（CTE）和高热稳定性，高耐磨性，高比刚度以及用于国防领域的耐腐蚀性能可以通过金属基复合材料（MMC）实现。这是因为金属和陶瓷的物理，热，电和机械性能差异很大。由于可能的量身定制的属性组合，MMC现在可以通过商业途径获得，并且规模越来越大。特别地，颗粒增强的铝基MMC引起人们的兴趣，并且占体积和质量基础上生产和使用的年度MMC的大部分。