Study of Carbon Nanotubes on Wear Performance of Aluminum Matrix Composites by Friction Stir Processing

2011 ◽  
Author(s):  
Weiping Xu ◽  
Liming Ke ◽  
Li Xing ◽  
Zhifeng Zhang ◽  
Xia Zhao
Keyword(s):  
Carbon Nanotubes ◽  
Friction Stir Processing ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Wear Performance ◽  
Friction Stir ◽  
The Matrix ◽  
Al Matrix Composites ◽  
Al Matrix

Carbon nanotubes (CNTs) reinforced Al matrix composites were prepared by friction stir processing (FSP). The effect of CNTs content on the wearing performance and hardness of Al matrix composites was studied. Results show that CNTs reinforced Al matrix composites by FSP are to create a good dispersion of the CNTs in the matrix and to achieve a good combination with the matrix. The interface of CNTs and pure aluminum matrix is smooth, no defects and is one kind of mechanical bonding interface. There are a large number of dislocations. CNTs can strengthen the matrix composites effectively and obviously improve the hardness of the composites. With increasing CNTs content, CNTs can also improve the wear performance of the matrix composites.

scholarly journals Microstructure and mechanical properties of aluminum matrix composites with different volume fractions of surface-oxidized nanodiamonds

2020 ◽  
Vol 29 ◽  
pp. 2633366X2097749
Author(s):  
Wei Yan ◽  
Mingchen Ma ◽  
Heyi Kang ◽  
Qian Li ◽  
Hongqun Tang ◽  
...  
Keyword(s):  
Volume Fraction ◽  
Testing Machine ◽  
Aluminum Matrix ◽  
Surface Oxidation ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Vacuum Sintering ◽  
The Matrix ◽  
Al Matrix Composites ◽  
Al Matrix

Nanodiamonds (NDs) have the characteristics of both diamonds and nanomaterials. However, it is difficult to disperse NDs, and this is why there is less research regarding NDs in the field of aluminum matrix composites. In the present work, NDs were modified via surface oxidation, and ND/Al matrix composites were successfully prepared via mechanical ball milling and vacuum sintering. The effects of different volume fraction of NDs (1%, 3%, 5%, 7%) after surface oxidation on the ND/Al matrix composite were analyzed using a metallographic microscope, scanning electron microscope, infrared spectrometer, X-ray diffractometer, microhardness tester, and universal testing machine. The results show that the optimal temperature of surface oxidation treatment is 673 K, which effectively purifies the surface of ND and introduces appropriate C=O functional groups. NDs are uniformly distributed in the aluminum matrix, and no harmful Al4C3 phase is formed. With an increase in the volume fraction of NDs, the grain size of the matrix first decreases and then increases, and the ultimate compressive strength first increases and then decreases. The volume fraction of ND with better comprehensive performance is 3% and the yield strength increased by 19%.

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