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Cf增强Ti/Al基层状复合材料的组织与性能研究
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哈尔滨工业大学

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中图分类号:

TG333;TG146.2

基金项目:

国家自然科学基金(51671073);国家重点研究发展计划(2016YFB0301201)


Research on Microstructure and Properties of Cf Reinforced Ti/Al Based Laminated Composites
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Affiliation:

Harbin Institute of Technology

Fund Project:

National Natural Science Foundation of China (51671073) ;National Key Research and Development Program of China 2016YFB0301201

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    摘要:

    利用箔-纤维-箔(FFF)法结合真空热压(VHP)技术制备新型的Cf增强Ti/Al基层状复合材料。借助扫描电镜(SEM),能谱分析(EDS),X射线物衍射物相分析测试(XRD),弯曲实验,压缩实验等对不同热压工艺参数下材料的组织及性能进行研究。结果表明,最佳热压工艺为700℃-30MPa-1h,材料弯曲强度可达469MPa,抗压强度可达324MPa。新型Cf增强Ti/Al基层状复合材料结构为韧-脆相交替的叠层,该结构可有效阻碍裂纹扩展并延长其扩展路径,吸收大量的断裂能,以此提高材料的性能。在Ti/Al界面处生成Al3Ti和Ti5Si3强化相;在Al/Cf界面处形成了Al4C3和SiC相。Si元素促进Ti、Al结合及强化相Ti5Si3的析出,并提高Al、C润湿性。

    Abstract:

    The foil-fiber-foil (FFF) method was used to prepare Cf reinforced Ti/Al-based layered composites through vacuum hot pressing (VHP) technology. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction phase analysis (XRD), bending test, and compression test were implemented to explore the microstructure and properties of the materials under different hot pressing parameters. The results show that the optimized parameters of hot-pressing process is 700°C-30MPa-1h. The bending strength and compressive strength of the material can reach 469MPa and 324MPa, respectively. The material structure is a stack of tough and brittle phases. This structure can effectively impede crack propagation and extension of the crack path, absorbing a large a mount of fracture energy, thereby improving the performance of the material. Al3Ti and Ti5Si3 phases are formed at the Ti/Al interface, and Al4C3 and SiC phases are formed at the Al/Cf interface. Si element promotes the bonding of Ti and Al, moreover, promoting the precipitation of the strengthening phase Ti5Si3, improving the wettability between Al and C.324MPa</sub><sub>,</sub> <sub>respectively .</sub><sub>The material structure is a stack of tough and brittle phases. This structure can effectively </sub><sub>impede</sub><sub> crack propagation and </sub><sub>extension of the </sub><sub>crack </sub><sub>path, </sub><sub>absorbing a large amount of fracture energy, thereby improving the performance of the material. Al3Ti and Ti5Si3 phases are formed at the Ti/Al interface, and Al4C3 and SiC phases are formed at the Al/Cf interface. Si element promotes </sub><sub>the bonding of </sub><sub>Ti and Al </sub><sub>, moreover,</sub> <sub>promoting the precipitation of the strengthening phase Ti5Si3</sub><sub>,</sub><sub>improving</sub><sub> the wettability </sub><sub>between</sub><sub> Al and C.</sub>

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唐迎春,罗磊,骆良顺,韩宝帅,苏彦庆,郭景杰,傅恒志. Cf增强Ti/Al基层状复合材料的组织与性能研究[J].稀有金属材料与工程,2019,48(11):3693~3700.[tangyingchun, luo lei, luo liangshun, han baoshuai, su yanqing, guo jingjie, fu hengzhi. Research on Microstructure and Properties of Cf Reinforced Ti/Al Based Laminated Composites[J]. Rare Metal Materials and Engineering,2019,48(11):3693~3700.]
DOI:10.12442/j. issn.1002-185X.20180653

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  • 收稿日期:2018-06-21
  • 最后修改日期:2018-07-24
  • 录用日期:2018-07-31
  • 在线发布日期: 2019-12-10
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