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摘要铝基复合材料质量轻、密度小、可塑性好，具有高的比强度，比模量和低的热膨胀系数，复合技术容易掌握，易于加工。本论文对原位反应合成方法制备的Al-SiO2-Mg系铝基复合材料，通过运用MG2000型磨损试验机进行磨损性能研究，测定Mg/SiO2不同摩尔比时铝基复合材料的室温磨损性能，观察磨损表面形貌，分析磨损机理。实验结果表明： Al-SiO2-Mg系铝基复合材料的磨损量与滑动路程呈良好的线性关系，磨损量随载荷增大而增大，随滑动速度增加和Mg/SiO2摩尔比的增大而减小；摩擦系数在某一均值上下浮动。Al-SiO2-Mg系铝基复合材料的显微组织呈Al2O3和Mg2Si增强体颗粒大致均匀分布在基体上，磨损时主要以粘着磨损为主。9039
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关键字 铝基复合材料 磨损性能 摩尔比 磨面形貌 磨损机理
毕业设计说明书（论文）外文摘要
Title Friction and wear properties of Al-SiO2-Mg system aluminum matrix composite
Abstract
Aluminum matrix composites have the quality of light, small density, good plasticity, and have a high specific strength and modulus and low thermal expansion coefficient. They are easier to master and easy to process. In this paper, the in-situ reaction synthesis methods of Al-SiO2-Mg system aluminum matrix composites were prepared and MG2000 type was used to study the wear properties of the synthesis of the department of Al-SiO2-Mg system aluminum matrix composites with different Mg/SiO2-molar ratio in different condition in room temperature. Then observing the worm surface morphology and analyzing of the wear mechanism. The experimental results show that: Al-SiO2-Mg system aluminum matrix composites with sliding wear is a good linear relationship between the journey, and wear increases with load increasing while decreases with sliding speed and Mg/SiO2-molar ratio increasing. Friction coefficient fluctuates in a mean. Al-SiO2-Mg system aluminum matrix composites show the microstructure with Al2O3 and Mg2Si reinforced particle roughly uniform distribution in the substrate. The wear mechanism gives priority to adhesion wear.
Key words Aluminum matrix composites, Frictional wear properties, Molar ratio, Worm surface morphology, Wear mechanism
目 录
1 引言 1
1.1 颗粒增强铝基复合材料的摩擦磨损性能 1
1.1.1 外加载荷 1
1.1.2 滑动速度 2
1.1.3 滑动路程 2
1.1.4 温度 2
1.1.5 内部因素 3
1.2 磨损机理 3
1.2.1 氧化磨损 4
1.2.2 磨料磨损 4
1.2.3 粘着磨损 4
1.2.4 疲劳磨损 4
1.2.5 微动磨损 5
2 实验 5
2.1 实验原料 5
2.2 实验设备 5
2.3 实验流程 6
2.4 实验步骤 7
2.5 实验方案 8
3 结果与分析 8
3.1 Al-SiO2-Mg系反应产物的分析 8
3.2 常温下复合材料的磨损性能 10
3.2.1 滑动路程对复合材料干滑动磨损性能的影响 10
3.2.2 载荷对复合材料干滑动磨损性能的影响 12
3.2.3 滑动速度对复合材料干滑动磨损性能的影响 13
4 磨面的形貌观察 15
4.1 Al-SiO2-Mg系磨损表面的形貌观察与分析 16
4.2 载荷大小对磨面的影响 16
4.3 滑动速度对磨面的影响 17
5 Al-SiO2-Mg系铝基复合材料的磨损机理分析 18