高体积分数SiC颗粒增强铝基复合材料的显微组织与弯曲性能研究

发布时间：2018-04-25 06:51

本文选题：SiC颗粒 + 铝基复合材料　；参考：《热加工工艺》2017年24期

【摘要】：选用无压浸渗制备的高体积分数Si C颗粒增强铝基复合材料,利用金相显微镜和图像分析软件对该复合材料中Si C颗粒的体积分数进行计算,同时利用扫描电镜和能谱仪对其微观组织和断口形貌进行分析。研究不同的跨距和加载速度对复合材料弯曲性能的影响。结果表明:以ZL101铝合金为基体制备的复合材料组织均匀、致密、无明显缺陷,利用体视学互换公式得出复合材料中Si C颗粒体积分数约为62.5%;在相同的加载速度下,跨距为40 mm时得到的弯曲模量算术平均值稍大于跨距为30 mm时的弯曲模量算术平均值,在相同的跨距下,当加载速度为0.5 mm/min时,得到弯曲强度和弯曲模量算术平均值比其他加载速度下略大;根据断口形貌可得出,复合材料的弯曲断裂为大颗粒Si C的脆性断裂和基体韧性断裂的混合。
[Abstract]:High volume fraction sic particle reinforced aluminum matrix composites prepared by pressureless infiltration were used to calculate the volume fraction of sic particles in the composites by metallographic microscope and image analysis software. At the same time, the microstructure and fracture morphology were analyzed by scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS). The effects of different span and loading speed on the bending properties of composites were studied. The results show that the composites prepared with ZL101 aluminum alloy as the matrix have uniform microstructure, compact structure and no obvious defects. The volume fraction of sic particles in the composites is about 62.5 by using the stereological swap formula, and at the same loading rate, the volume fraction of sic particles in the composites is about 62.5. When the span is 40 mm, the arithmetic mean value of flexural modulus is slightly larger than that of 30 mm span. At the same span, when the loading speed is 0.5 mm/min, According to the fracture morphology, the bending fracture of the composite is a mixture of brittle fracture and matrix ductile fracture of large grain sic.
【作者单位】：江苏省产品质量监督检验研究院;
【基金】：江苏省产品质量监督检验研究院院科技项目(YKY 2016004)
【分类号】：TB333

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