NDLI: Microstructure and mechanical properties of Al-base composites by addition of Al–Ni–Co decagonal quasicrystalline particles through a mechanical stirring route

Content Provider	Springer Nature Link
Author	Zhu, Man Yang, Gencang Yao, Lijuan Cheng, Suling Zhou, Yaohe
Copyright Year	2010
Abstract	In the present study, the A356Al-base composite materials were fabricated by introducing 2.5, 5, 7.5, 10 mass% of Al–Ni–Co decagonal quasicrystalline particles using the mechanical stirring method. The microstructures, mechanical properties, and Brinell hardness of these composites were investigated in detail by means of scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). It is found that serious compositional diffusion occurs between the Al$_{72}$Ni$_{12}$Co$_{16}$ quasicrystalline particles and the Al melt. Microstructural analysis of all as-cast composites shows that the structure of the quasicrystal disappears and is replaced by the formation of two crystalline phases, Co-rich θ-phase and Ni-rich γ-phase which all contain Al, Si, Ni, and Co. The particle sizes of the two crystalline phases are much smaller than that of the original decagonal quasicrystalline phase. The composites exhibit improvement of 10.5–24% and 20–25% in yield strength and Brinell hardness, respectively, while the percent elongation decreases obviously. Examination of the fracture surface of the as-cast A356Al-base composites shows that they exhibit typical brittle fracture mode.
Starting Page	3727
Ending Page	3734
Page Count	8
File Format	PDF
ISSN	00222461
Journal	Journal of Materials Science
Volume Number	45
Issue Number	14
e-ISSN	15734803
Language	English
Publisher	Springer US
Publisher Date	2010-03-27
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Mechanics Crystallography Continuum Mechanics and Mechanics of Materials Polymer Sciences Characterization and Evaluation of Materials Materials Science
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Mechanics of Materials Mechanical Engineering Polymers and Plastics

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