| 高体积分数SiCp/Al复合材料杯形件高温反挤压成形 |
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| 引用本文： | 曾莉,任学平,卢尚文,崔岩.高体积分数SiCp/Al复合材料杯形件高温反挤压成形[J].北京科技大学学报,2010,32(9). |
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| 作者姓名： | 曾莉 任学平 卢尚文 崔岩 |
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| 作者单位： | 1. 北京科技大学材料科学与工程学院,北京,100083
2. 北京航空材料研究院先进复合材料国防科技重点实验室,北京,100095 |
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| 基金项目： | 国家高技术研究发展计划资助项目 |
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| 摘 要： | 将无压浸渗制备出的高体积分数SiCp/Al复合材料,通过高温反挤压方式成形杯形件.研究了在高温反挤压过程中复合材料的流变规律,利用扫描电镜(SEM)观察分析了高温反挤压参数对杯形件组织的影响.结果表明:在基体熔点以上,高体积分数SiCp/Al复合材料呈黏流体状态,颗粒与基体形成固-液混合体;高体积分数SiCp/Al复合材料高温反挤压变形后,基体仍保持连续,SiC颗粒在压力作用下发生转动、重排,部分颗粒破碎,颗粒分布均匀性较好;当变形温度较低、挤压速度较大时,颗粒易破碎,SiCp/Al复合材料杯形件内部颗粒尺寸不均匀,杯形件内角处颗粒尺寸较小;当变形温度较高、挤压速度较小时,杯形件内部颗粒尺寸均匀.
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| 关 键 词： | 碳化硅 铝 金属基复合材料 反挤压 挤压成形 |
High-temperature backward extrusion forming of aluminum matrix composite cup-shaped parts with high volume fraction of SiCp |
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| ZENG Li,REN Xue-ping,LU Shang-wen,CUI Yan.High-temperature backward extrusion forming of aluminum matrix composite cup-shaped parts with high volume fraction of SiCp[J].Journal of University of Science and Technology Beijing,2010,32(9). |
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| Authors: | ZENG Li REN Xue-ping LU Shang-wen CUI Yan |
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| Institution: | ZENG Li1),REN Xue-ping1),LU Shang-wen1),CUI Yan2) 1) School of Materials Science , Engineering,University of Science , Technology Beijing,Beijing 100083,China2) Defence-related Science , Technology Key Laboratory of Advanced Composites,Beijing Institute of Aeronautical Materials,Beijing 100095,China |
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| Abstract: | An aluminum matrix composite with high volume fraction of SiCp was prepared by pressureless infiltration.Cup-shaped parts were made of the SiCp/Al composite by using high temperature backward extrusion.The flow stress behavior of the SiCp/Al composite during hot backward extrusion was investigated.The effects of hot backward extrusion parameters on the microstructure of the SiCp/Al composite were observed and analyzed by SEM.The results show that at temperatures above the melting point of aluminum matrix th... |
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| Keywords: | silicon carbide aluminum metal matrix composites backward extrusion extrusion molding |
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