液态金属浸渗纤维预制体的临界压力与浸渗行为

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Cf/Mg复合材料。...

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Bibliographic Details
Published in中国有色金属学报：英文版 no. 11; pp. 3173 - 3179
Main Author 关俊涛 齐乐华 刘健 周计明 卫新亮
Format Journal Article
LanguageEnglish
Published 2013
Subjects
临界压力
浸渗
浸渗速率
碳纤维
金属基复合材料
镁
预制体
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ISSN1003-6326

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Summary: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Cf/Mg复合材料。
Bibliography:metal matrix composites; carbon fiber; Mg; perform; infiltration; threshold pressure; infiltration rate
43-1239/TG
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.
Jun-tao GUAN, Le-hua QI, Jian LIU, Ji-ming ZHOU, Xin-liang WEI 1. School of Mechatronic Engineering, Northwestern Polytechnical University, Xi＇an 710072, China; 2. Key Laboratory of Contemporary Design and Integrated Manufacturing Technology, Ministry of Education, Northwestern Polytechnical University, Xi＇an 710072, China; 3. Faculty of Printing and Packaging Engineering, Xi＇an University of Technology, Xi＇an 710048, China
ISSN:1003-6326