Mechanical and thermal properties of carbon nanotube/aluminum composites consolidated by spark plasma sintering

2012 ◽  
Vol 41 ◽  
pp. 344-348 ◽  
Author(s):  
Jianhua Wu ◽  
Hailong Zhang ◽  
Yang Zhang ◽  
Xitao Wang
2007 ◽  
Vol 48 (9) ◽  
pp. 2506-2512 ◽  
Author(s):  
Shunsuke Yamanaka ◽  
Ryohei Gonda ◽  
Akira Kawasaki ◽  
Hiroki Sakamoto ◽  
Yutaka Mekuchi ◽  
...  

2008 ◽  
Vol 368-372 ◽  
pp. 701-703 ◽  
Author(s):  
Kaleem Ahmad ◽  
Wei Pan ◽  
Chun Lei Wan

Multi-walled carbon nanotube (MWNT) reinforced alumina composites with different MWNT contents (5 and 10 vol %) were fabricated by spark plasma sintering. The room temperature dc electrical conductivity, thermal conductivity, and mechanical properties were investigated. Results showed that the electrical conductivity has improved around twelve orders of magnitude by addition of 5 vol% of MWNT. The fracture toughness changed from 3.2 to 4.4 MPa m1/2 with 39% improvement over monolithic Al2O3. The thermal conductivity decreased with increase of MWNT contents. The low values of thermal conductivity suggest that interfacial thermal barrier play an important role in determining these properties. MWNT can be used to improve concurrently electrical, mechanical properties of Al2O3 but with lower values of thermal properties.


2020 ◽  
Vol 54 (19) ◽  
pp. 2539-2548
Author(s):  
Li-Fu Yi ◽  
Takashi Yamamoto ◽  
Tetsuhiko Onda ◽  
Zhong-Chun Chen

Electroless nickel-coated carbon fibers/aluminum composites were prepared by spark plasma sintering, and the effect of nickel coating on microstructure and thermal properties of the composites has been investigated. Nickel coating on carbon fibers resulted in more homogeneous distributions of carbon fibers in aluminum matrix, higher relative density of carbon fibers/aluminum composites, and stronger interfacial bonding between carbon fibers and aluminum. Microstructural observations exhibited that the majority of carbon fibers were randomly distributed on the sections (X-Y direction) perpendicular to spark plasma sintering pressing direction (Z direction), thus leading to an anisotropic behavior in thermal conductivity of the composites. The thermal conductivity values in the X-Y direction of the carbon fibers/aluminum composites were much higher than those in the Z direction. As a result, the nickel-coated carbon fibers/aluminum composites with a nickel-coating thickness of ∼0.2 µm showed higher thermal conductivity and lower coefficient of thermal expansion values in comparison with those of the uncoated carbon fibers/aluminum samples.


2006 ◽  
Vol 70 (9) ◽  
pp. 721-728 ◽  
Author(s):  
Shunsuke Yamanaka ◽  
Ryohei Gonda ◽  
Akira Kawasaki ◽  
Hiroki Sakamoto ◽  
Yutaka Mekuchi ◽  
...  

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