Preparation and Microstructure of Nano ZrB2 Reinforced Aluminum Matrix Composites

Hong Ming Wang; Guirong Li; Yun Cai; Yu Tao Zhao

doi:10.4028/www.scientific.net/KEM.575-576.179

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 575-576Preparation and Microstructure of Nano ZrB2...

Preparation and Microstructure of Nano ZrB₂ Reinforced Aluminum Matrix Composites

Abstract:

The ZrB₂ particulate reinforced aluminum matrix composites were fabricated via melt direct reaction method using Al-K₂ZrF₆-KBF₄components. 850°C and 30 min were the optimized synthesizing temperature and reaction time separately. The metallurgical thermodynamic and kinetic processes were then analyzed in detail. It reveals that the interphases include Al₃Zr, AlB₂, [Z and [ atoms. The ZrB₂ particulates can be acquired through the molecular combination between Al₃Zr and AlB₂or atomic combination between Zr and B atomics. The in situ reaction between reactive salts and molten aluminum takes place spontaneously, which exhibits the character of liquid-liquid reaction. Scanning electronic microscope observation results demonstrate that the sizes of ZrB₂ particulates are almost 100-200 nm. The intervals between particles are almost 200-400 nm, demonstrating a unirom status of distribution.

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Periodical:

Key Engineering Materials (Volumes 575-576)

Pages:

179-182

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.575-576.179

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Online since:

September 2013

Authors:

Hong Ming Wang, Guirong Li, Yun Cai, Yu Tao Zhao

Keywords:

Aluminum Matrix Composite (AMC), Metallurgical Kinetic, Metallurgical Thermodynamic, Microstructure, ZrB₂Particles

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