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7. Fabrication of in-situ grown carbon nanotubes reinforced aluminum alloy matrix composite foams based on powder metallurgy method

Author

Junwei Sha, Jiajun Li, Kunming Yang, Xu Jiali, Xudong Yang, Naiqin Zhao, Chunnian He, Ma Youcao, and Chunsheng Shi

Subjects
Materials science, Composite number, Alloy, Nucleation, Titanium hydride, 02 engineering and technology, Carbon nanotube, Chemical vapor deposition, engineering.material, 010402 general chemistry, 01 natural sciences, law.invention, chemistry.chemical_compound, law, Blowing agent, Powder metallurgy, General Materials Science, Composite material, Mechanical Engineering, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 0104 chemical sciences, chemistry, Mechanics of Materials, engineering, 0210 nano-technology
Abstract

Uniformly dispersed carbon nanotubes (CNTs) reinforced aluminum (Al) alloy matrix composite foams were successfully fabricated by the combination of in-situ chemical vapor deposition and powder metallurgy using titanium hydride as a blowing agent. The effects of CNTs on the pore structure were systematically studied. The results showed that compared to the Al alloy foam, the introduction of CNTs could significantly improve the pore uniformity and reduce the pore size. As a result, the compressive property of composite foam had an obvious increase. The reasons for the enhanced pore structure mainly lie in that the CNTs increased nucleation sites for the decomposed hydrogen and the limited the movements of bubbles in the melt during foaming process.

Published
2018

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