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首页> 外文会议>International Conference on Frontiers of Mechanical Engineering and Materials Engineering >Microstructure and Properties of SiC Particle Reinforced Aluminum Matrix Composites by Powder Metallurgy Method
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Microstructure and Properties of SiC Particle Reinforced Aluminum Matrix Composites by Powder Metallurgy Method

机译：粉末冶金方法SiC颗粒增强铝基基复合材料的组织与性能

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摘要

The aim of this study is to investigate the effect of SiC particle pretreatment, aluminum matrix particle size and sintering temperature on relative density, hardness, microstructure and wear resistance to SiC particle einforced aluminum matrix composites. To this end, the amount of 16.7 wt.% SiC with average particle sizes 20μm was used along with pure aluminum of average particle size of 75 μm and 25μm. Powder metallurgy is a method used in the fabrication of this composite in which the powders were mixed using a planetary ball mill. By analyzing SEM micrograph and the Property test, it is concluded that SiC particle pretreatment has significant effect on the morphology of specimens. pretreatment increase the interface adhesion, improve the wettability. SiC is uniformly distributed in the matrix, with good relation to the substrate, the maximum hardness is 51.1HB, the minimum wear rate is 0.1684%, while the density is 97.3%. For the same SiC content and particle size, the smaller the particle size of aluminum matrix is, the higher wear resistance of composite materials is on condition that others are same, the higher sintering temperature and the higher the wearability of composites, the wear resistance of the composite material is significantly improved after SiC pre-processing. The relative density increases with increasing aluminum matrix particle sizes under the same pressure and the holding time. The actual density of all samples reached the theoretical density over 96%, to a maximum of 98.9%.
机译：本研究的目的是探讨SiC颗粒预处理，铝基质粒度和烧结温度对SiC颗粒对铝基质复合材料的相对密度，硬度，微观结构和耐磨性的影响。为此，使用平均粒度为20μm的16.7重量％的SiC。纯铝平均粒径为75μm和25μm。粉末冶金是一种用于制造该复合材料的方法，其中使用行星球磨机混合粉末。通过分析SEM显微照片和性能测试，得出结论，SiC颗粒预处理对样本形态具有显着影响。预处理增加界面粘附，提高润湿性。 SiC在基质中均匀分布，与基材有良好的关系，最大硬度为51.1Hb，最小磨损率为0.1684％，而密度为97.3％。对于相同的SiC含量和粒度，铝基粒径越小，复合材料的耐磨性较高的条件是其它相同，烧结温度越高，复合材料的耐磨性越高，耐磨性在SiC预处理后，复合材料显着提高。在相同的压力和保持时间下，相对密度随着铝基粒子尺寸的增加而增加。所有样品的实际密度达到了96％以上的理论密度，最高为98.9％。

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