Investigation of wear behaviours of Al matrix composites reinforced with different B 4 C rate produced by powder metallurgy method

2017 ◽  
Vol 28 (9) ◽  
pp. 2218-2224 ◽  
Author(s):  
Yahya Hışman Çelik ◽  
Kübra Seçilmiş
Keyword(s):  
Powder Metallurgy ◽  
Powder Metallurgy Method ◽  
Matrix Composites ◽  
Al Matrix Composites ◽  
Al Matrix

scholarly journals Mechanical and Electrical Properties of Nano Al-Matrix Composites Reinforced with SiC and Prepared by Powder Metallurgy

2021 ◽  
Vol 12 (2) ◽  
pp. 2068-2083
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Compressive Strength ◽  
Electron Microscope ◽  
Powder Metallurgy ◽  
Relative Density ◽  
Apparent Porosity ◽  
Matrix Composites ◽  
Al Matrix Composites ◽  
Al Matrix

Nano Al-matrix composites reinforced with SiC were prepared by powder metallurgy process. The percentages of added SiC were varied between 0, 2, 4, 6, and 8 wt. %. The starting powders were milled in high-energy ball mill for 10hrs to convert into nanopowders; then compacted and sintered for 1h in an argon atmosphere at 400, 500, and 570°C. X-ray technique and transmission electron-microscope were utilized to examine the prepared powders, while scanning electron-microscope was utilized to test the sintered composites. The relative density, apparent porosity, electrical conductivity, and mechanical properties (microhardness, elastic moduli, and compressive strength) of sintered composites were studied. The results showed no sign for phase changes after milling, and the SiC reinforcement was uniformly distributed in the matrix. The relative density and electrical conductivity were decreased with increasing SiC content, while the apparent porosity was increased. It is also found that the mechanical properties were improved with increasing SiC content. Also, all properties were improved with increasing sintering temperature. The hardness, compressive strength, bulk modulus of Al-8wt.% SiC composite sintered at 570°C were 885.4 MPa, 276.2 MPa, and 135.9 GPa, respectively.

103 High-Strength Powder Metallurgy Al Matrix Composites Reinforced with in-Situ Al_4C_3 Nanorods

2015 ◽  
Vol 2015.23 (0) ◽  
pp. _103-1_-_103-4_
Author(s):  
Biao CHEN ◽  
Hisashi IMAI ◽  
Motohiro ONISHI ◽  
Katsuyoshi KONDOH
Keyword(s):  
Powder Metallurgy ◽  
High Strength ◽  
Matrix Composites ◽  
Al Matrix Composites ◽  
Al Matrix

Exploration of Al Matrix Composites Reinforced with Al-Ti Intermetallics/Ti Metal Compound Spherical Agents

2013 ◽  
Vol 652-654 ◽  
pp. 43-47
Author(s):  
Li Zhang ◽  
Bao Lin Wu ◽  
Yu Hua Zhao
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Powder Metallurgy ◽  
Ambient Temperature ◽  
Metal Compound ◽  
Matrix Composites ◽  
Relative Thickness ◽  
Al Matrix Composites ◽  
Metal Layers ◽  
Al Matrix

In this paper, Al matrix composites reinforced with Al-Ti intermetallics/Ti metal compound spherical agents were successfully fabricated through powder metallurgy way. Al-Ti intermetallic including Al3Ti and TiAl phases are main reinforcements and inner Ti metal could not only play reinforce role but also reduce the crack sensitivity of Al-Ti intermetallics. This kind of reinforcements bonded strongly with Al matrix. As expected, the resultant composites exhibit promising mechanical properties at ambient temperature. And the mechanical property could be improved through regulating the relative thickness of the Al-Ti intermetallics and Ti metal layers.

scholarly journals Enhancement on the Tribological Properties of the Multilayer RGO/Al Matrix Composites by Cu-Coating Method

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3163
Author(s):  
Fengguo Liu ◽  
Ning Su ◽  
Renguo Guan
Keyword(s):  
Electron Microscope ◽  
Tribological Properties ◽  
Milled Powder ◽  
Wear Loss ◽  
Matrix Composites ◽  
Tem Analysis ◽  
Lubricating Film ◽  
Coating Method ◽  
Al Matrix Composites ◽  
Al Matrix

Multilayer reduced graphene oxide (mrGO) was chemically modified by electroless plating of copper on surface to form mrGO-Cu. The scanning electron microscope (SEM) and transmission electron microscope (TEM) analysis revealed that nano-Cu particles were uniformly dispersed on the surface of mrGO. The mrGO-Cu powders were further utilized as reinforcements for aluminum (Al) matrix and the mrGO-Cu/Al composite was successfully fabricated through clad rolling of milled powder. The tribological properties of the mrGO-Cu/Al composites were explored. The tribological results show that the mrGO-Cu could reduce the friction coefficient and wear loss of mrGO-Cu/Al composites, since the mrGO-Cu participated in lubricating processes due to the formation of a transfer layer on the contact surface. Furthermore, it is found that the composition of mrGO-Cu could significantly influence the tribological properties of the mrGO-Cu/Al composites. The composites with 4% of mrGO-Cu for composites exhibited the best tribological behavior, which transformed from adhesive wear to abrasive wear, due to the formation of a graphite lubricating film.

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