Inhibitive Effect of Seawater on the Corrosion of Particulate-Reinforced Aluminum-Matrix Composites and Monolithic Aluminum Alloy

2009 ◽  
Vol 156 (10) ◽  
pp. C352 ◽  
Author(s):  
Hongbo Ding ◽  
G. A. Hawthorn ◽  
L. H. Hihara
Keyword(s):  
Aluminum Alloy ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Particulate Reinforced

Microstructure and Mechanical Performance of Ultrasonically Brazed Joints of High Fraction Volume of SiC Particulate Reinforced Aluminum Matrix Composites

2011 ◽  
Vol 291-294 ◽  
pp. 910-914
Author(s):  
Yang Zhang ◽  
Cha Qin ◽  
Hao Zhu
Keyword(s):  
Shear Strength ◽  
Mechanical Performance ◽  
Filler Metal ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Brazed Joints ◽  
High Fraction ◽  
Wetted Area ◽  
Particulate Reinforced

The ultrasonically brazing of 55 vol.% SiCp/A356 composites in air has been investigated. When the ultrasonic vibration is applied for 0.5s, the oxide layer is still continuous at most places between the filler metal and the composites. The shear strength is only ~30% of that of the base composites. As the ultrasonic action time increases, the oxide film sufficiently disappears in the bond region, and the wetted area between the filler metal and SiC particles increases gradually. As a consequence of this, the shear strength of bonds also increases with the ultrasonically acting time. The maximum value of the shear strength of the bonds reaches 165.5MPa when the ultrasonic acting time increases to 5s, which is similar to the shear strength of the base composites.

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.

Study on Ultrasonic Vibration Drilling of Particulate Reinforced Aluminum Matrix Composites

2005 ◽  
Vol 291-292 ◽  
pp. 447-452 ◽  
Author(s):  
C.S. Liu ◽  
Bo Zhao ◽  
G.F. Gao ◽  
X.H. Zhang
Keyword(s):  
Ultrasonic Vibration ◽  
Metal Matrix ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Twist Drill ◽  
The Common ◽  
Vibration Drilling ◽  
Al Matrix Composites ◽  
Particulate Reinforced

Metal matrix composites（MMCs）is applied widely in recent years because of its excellent performances, but the machining is very difficult due to the rigidity of reinforced-phase in it, so, the application of MMCs is restricted much. In this paper the experiment of common and ultrasonic vibration drilling is performed to SiC particulate reinforced Al matrix composites （SiCp/Al）by use of carbide-alloy-twist-drill, and the surface roughness of hole is compared, furthermore, the wearing of twist drill and the feature of chips are analyzed by scanning electron microscope (SEM). From above, we can draw aconclusion that ultrasonic vibration drilling may meliorate the mechanism of drilling to some extent and it takes on much superiority that the common drilling is unmatched, so this method could provide a certain foundation for the posterior study and application.

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