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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(英文),2018,47(3):982~989.[Wang Zhenjun,Zhu Shixue,Yu Huan,Xu Zhifeng and 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.]
Effect of fabrication temperature on the microstructure and mechanical property of 3D fabric reinforced Cf/Al composites*
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Received:January 14, 2016  Revised:May 12, 2016
DOI:
Key words: Cf/Al composites  microstructure  interface  mechanical property  elevated temperature
Foundation item: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.
Author NameAffiliation
Wang Zhenjun,Zhu Shixue,Yu Huan,Xu Zhifeng and Chen Xinwen  
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Abstract:
      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.