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

Harbin Institute of Technology

Clc Number:

TG333;TG146.2

Fund Project:

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

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    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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[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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History
  • Received:June 21,2018
  • Revised:July 24,2018
  • Adopted:July 31,2018
  • Online: December 10,2019
  • Published: