The dynamic mechanical response of Al2O3 and TiB2 particulate reinforced aluminum matrix composites produced by in-situ reaction

1999 ◽  
Vol 38 (1) ◽  
pp. 39-44 ◽  
Author(s):  
S.C. Tjong ◽  
Z.Y. Ma ◽  
R.K.Y. Li
Keyword(s):  
Mechanical Response ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Dynamic Mechanical ◽  
In Situ Reaction ◽  
Particulate Reinforced

Study on Mechanical Properties of AA6351 Alloy Reinforced with Titanium Di-Boride (TiB2) Composite by In Situ Casting Method

2015 ◽  
Vol 787 ◽  
pp. 583-587 ◽  
Author(s):  
V. Mohanavel ◽  
K. Rajan ◽  
K.R. Senthil Kumar
Keyword(s):  
Tensile Strength ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composites ◽  
Scanning Electron Micrographs ◽  
Matrix Composites ◽  
X Ray Diffraction ◽  
In Situ Reaction ◽  
Halide Salts ◽  
Scanning Electron

In the present study, an aluminum alloy AA6351 was reinforced with different percentages (1, 3 and 5 wt %) of TiB2 particles and they were successfully fabricated by in situ reaction of halide salts, potassium hexafluoro-titanate and potassium tetrafluoro-borate, with aluminium melt. Tensile strength, yield strength and hardness of the composite were investigated. In situ reaction between the inorganic salts K2TiF6 and KBF4 to molten aluminum leads to the formation of TiB2 particles. The prepared aluminum matrix composites were characterized using X-ray diffraction and scanning electron microscope. Scanning electron micrographs revealed a uniform dispersal of TiB2 particles in the aluminum matrix. The results obtained indicate that the hardness and tensile strength were increased with an increase in weight percentages of TiB2 contents.

Preparation and Microstructure of Nano ZrB2 Reinforced Aluminum Matrix Composites

2013 ◽  
Vol 575-576 ◽  
pp. 179-182
Author(s):  
Hong Ming Wang ◽  
Guirong Li ◽  
Yun Cai ◽  
Yu Tao Zhao
Keyword(s):  
Molten Aluminum ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composites ◽  
Direct Reaction ◽  
Matrix Composites ◽  
Liquid Reaction ◽  
Particulate Reinforced ◽  
Electronic Microscope ◽  
Observation Results

The ZrB2 particulate reinforced aluminum matrix composites were fabricated via melt direct reaction method using Al-K2ZrF6-KBF4 components. 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 AlB2 or 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.

Impact Properties of Particulate Reinforced Aluminum Matrix Composites

2013 ◽  
Vol 842 ◽  
pp. 233-236 ◽  
Author(s):  
Dong Chen ◽  
Xian Feng Li ◽  
Yi Jie Zhang ◽  
Nai Heng Ma ◽  
Hao Wei Wang
Keyword(s):  
Impact Toughness ◽  
Aluminum Matrix ◽  
Weight Fraction ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Impact Properties ◽  
Fine Grain ◽  
The Impact ◽  
Particulate Reinforced

TiB2 particulate reinforcing 7449 aluminum matrix composites were fabricated by in situ method. Their microstructure and impact properties were investigated. The impact toughness decreases with the increase of the weight fraction of the particulate whereas the hardness of the composites increases. The decrease of impact toughness could be accounted for the particulate cluster and brittle clusions. The increase of the hardness is due to fine grain size and high dislocation density.

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