王振军,朱世学,余欢,徐志锋,陈新文.预热温度对三维五向Cf/Al复合材料微观组织及室温与高温力学性能的影响[J].稀有金属材料与工程,2018,47(3):982~989.[Wang Zhenjun,Zhu Shixue,Yu Huan,Xu Zhifeng,Chen Xinwen.Effect of fabrication temperature on the microstructure and mechanical property of 3D fabric reinforced Cf/Al composites*[J].Rare Metal Materials and Engineering,2018,47(3):982~989.]
预热温度对三维五向Cf/Al复合材料微观组织及室温与高温力学性能的影响
投稿时间:2016-01-14  修订日期:2016-05-12
中文关键词:  Cf/Al复合材料  微观组织  界面  力学性能  高温
基金项目:国家自然科学基金(51365043),凝固技术国家重点实验室开放基金(SKLSP201228)和江西省自然科学基金(20151BAB206004)资助项目.
中文摘要:
      以石墨纤维三维五向织物为增强体,铝合金ZL301为基体材料,采用真空辅助压力浸渗法制备了三维五向增强Cf/Al复合材料,研究了不同温度制备的复合材料微观组织特征和界面反应程度,测试了复合材料在室温和高温下的拉伸力学性能并分析了其断口形貌。结果表明:复合材料相对致密度随制备温度提高而增加,纤维局部偏聚现象也明显减少,与此同时,界面反应物Al4C3相随制备温度提高而显著增多,530℃到570℃复合材料室温拉伸极限强度随组织缺陷减少而增加,570℃到600℃复合材料室温极限拉伸强度随界面反应程度增大而显著降低;高温拉伸极限强度随制备温度提高而增加,适当提高界面反应程度有利于提高复合材料高温力学性能,高温拉伸中基体合金回复软化和界面结合强度弱化促进了复合材料断裂过程中的纤维拔出与界面滑移。
Effect of fabrication temperature on the microstructure and mechanical property of 3D fabric reinforced Cf/Al composites*
英文关键词:Cf/Al composites  microstructure  interface  mechanical property  elevated temperature
英文摘要:
      3D fabric reinforced Cf/Al composites were fabricated by the vacuum assisted pressure infiltration method. The microstructure and interfacial reaction of the composites prepared at different temperature levels was investigated. The uniaxial tensile property of the composites was tested at room temperature and elevated temperature and the corresponding tensile fracture surface was analyzed. The results indicated that the relative density increased and the fiber segregation in partial region decreased with fabrication temperature increasing. Meanwhile the content of Al4C3 compound at interface increased obviously. At room temperature, the ultimate tensile strength of the composites from 570℃ to 600℃ degenerated dramatically with interfacial reaction aggravated. When the composites were tested at elevated temperature, however, the ultimate tensile strength increased with fabrication temperature increasing. The improvement of interfacial strength is beneficial to the high temperature mechanical property. The matrix alloy softening and interface weakening due to elevated temperature can promote the fiber pull out and interface sliding during the fracture process.
作者单位E-mail
王振军 南昌航空大学 轻合金加工科学与技术国防重点学科实验室 wangzhj@nchu.edu.cn 
朱世学 南昌航空大学 轻合金加工科学与技术国防重点学科实验室 773980628@qq.com 
余欢 南昌航空大学 轻合金加工科学与技术国防重点学科实验室  
徐志锋 南昌航空大学 轻合金加工科学与技术国防重点学科实验室 xuzhfnchu@yahoo.cn 
陈新文 中航工业北京航空材料研究院  
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