Threshold pressure and infiltration behavior of liquid metal into fibrous preform  

液态金属浸渗纤维预制体的临界压力与浸渗行为(英文)

作　　者：关俊涛[1] 齐乐华[1,2] 刘健[1,3] 周计明[1,2] 卫新亮[1] 

机构地区：[1]西北工业大学机电学院,西安710072 [2]西北工业大学现代设计与集成制造技术教育部重点实验室,西安710072 [3]西安理工大学印刷包装工程学院,西安710048

出　　处：《Transactions of Nonferrous Metals Society of China》2013年第11期3173-3179,共7页中国有色金属学报（英文版）

基　　金：Projects(51221001,51275417)supported by the National Natural Science Foundation of China;Project(2013AA8011004B)supported by National High Technology Research and Development Program of China;Project(CX201011)supported by the Doctorate Foundation of Northwestern Polytechnical University,China

摘　　要：A dynamic measuring apparatus was developed to investigate the infiltration process of liquid metal into the fibrous preform. 10% （volume fraction） chopped carbon fiber preforms were infiltrated with magnesium alloy under different infiltration pressures. The threshold pressure and flow behavior of liquid metal infiltrating into the preforms were calculated and measured. The microstructure of obtained Ct4Mg composites was observed. The results indicate that the measured threshold pressure for infiltration was 0.048 MPa, which was larger than the calculated value. The infiltration rate increased with the increase of infiltration pressure, but the increase amplitude decreased gradually. The tiny pores in the composites could be eliminated by increasing the infiltration pressure. When the infiltration pressure rose to 0.6 MPa, high quality C1/Mg composite was obtained.开发液态金属浸渗过程动态测量装置,以其深入研究液态金属在纤维预制体内部的渗流行为。利用该装置进行液态镁合金浸渗10%体积分数短碳纤维预制体的研究,测量浸渗过程中的临界浸渗压力,研究浸渗压力对浸渗速率的影响,观察不同浸渗压力下复合材料的微观形貌。结果表明:浸渗所需的临界压力为0.048 MPa,大于理论计算结果;随着浸渗压力的增大,液态金属的浸渗速率提高,但提高的幅度逐步降低;增大浸渗压力能够有效消除复合材料中的未浸渗缺陷;浸渗压力为0.6 MPa时获得组织致密的C f/Mg复合材料。

关 键 词：metal matrix composites carbon fiber Mg PERFORM INFILTRATION threshold pressure infiltration rate 

分 类 号：TQ343.2[化学工程—化纤工业]