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首页> 外文期刊>Journal of Materials Science >Effect of the SiC particle size on the dry sliding wear behavior of SiC and SiC-Gr-reinforced Al6061 composites
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Effect of the SiC particle size on the dry sliding wear behavior of SiC and SiC-Gr-reinforced Al6061 composites

机译：SiC粒径对SiC和SiC-Gr增强Al6061复合材料干滑动磨损行为的影响

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摘要

The effect of size of silicon carbide particles on the dry sliding wear properties of composites with three different sized SiC particles (19, 93, and 146 μm) has been studied. Wear behavior of Al6061/10 vol% SiC and Al6061/10 vol% SiC/5 vol% graphite composites processed by in situ powder metallurgy technique has been investigated using a pin-on-disk wear tester. The debris and wear surfaces of samples were identified using SEM. It was found that the porosity content and hardness of Al/10SiC composites decreased by 5 vol% graphite addition. The increased SiC particle size reduced the porosity, hardness, volume loss, and coefficient of friction of both types of composites. Moreover, the hybrid composites exhibited lower coefficient of friction and wear rates. The wear mechanism changed from mostly adhesive and micro-cutting in the Al/10SiC composite containing fine SiC particles to the prominently abrasive and delamination wear by increasing of SiC particle size. While the main wear mechanism for the unreinforced alloy was adhesive wear, all the hybrid composites were worn mainly by abrasion and delamination mechanisms.
机译：研究了碳化硅颗粒尺寸对三种不同尺寸的SiC颗粒（19、93和146μm）的复合材料干滑动磨损性能的影响。使用针盘式磨损测试仪研究了通过原位粉末冶金技术处理的Al6061 / 10 vol％SiC和Al6061 / 10 vol％SiC / 5 vol％石墨复合材料的磨损行为。使用SEM识别样品的碎片和磨损表面。研究发现，添加5 vol％的石墨后，Al / 10SiC复合材料的孔隙率和硬度降低。 SiC颗粒尺寸的增加降低了两种类型复合材料的孔隙率，硬度，体积损失和摩擦系数。此外，杂化复合材料表现出较低的摩擦系数和磨损率。磨损机理从含细SiC颗粒的Al / 10SiC复合材料中的主要是粘合剂和微切割转变为通过增加SiC颗粒尺寸而显着的磨损和分层磨损。尽管未增强合金的主要磨损机制是粘合磨损，但所有杂化复合材料的磨损主要是通过磨损和分层机制进行的。

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