scholarly journals Study on Critical Infiltration Behavior and Law of Liquid Aluminum Alloy in Carbon Fiber Preform

2020 ◽  
Vol 26 (4) ◽  
pp. 408-414
Author(s):  
Yuiqin MA
Keyword(s):  
Aluminum Alloy ◽  
Carbon Fiber ◽  
Volume Fraction ◽  
Liquid Aluminum ◽  
Theoretical Research ◽  
Fiber Preform ◽  
Mechanical Pressure ◽  
Pressure Infiltration ◽  
Infiltration Pressure ◽  
Infiltration Method

Infiltration effect is an important factor for the preparation of ideal CF/Al composites by liquid infiltration method, so it is necessary to study the infiltration law of aluminum alloy in carbon fiber preform to obtain composite with sufficient and uniform infiltration effect. Through theoretical analysis and calculation of statics and dynamics, critical infiltration pressures of the liquid aluminum alloy in the 2D carbon fiber preform were 0.53 MPa and 3.24 MPa, respectively, when carbon fiber volume fraction was 45 %. Mechanical pressure infiltration method was used to study critical infiltration pressures and behavior of the liquid aluminum alloy in the 2D carbon fiber preform, and the experimental results indicated that the infiltration front of aluminum alloy had never broken through the surface of carbon fiber preform, when the infiltration pressure was 3.5 MPa. Carbon fibers and aluminum alloy were separated and the infiltration effect was not ideal under the pressure of 3.5 MPa. When the infiltration pressure was 7 MPa, the infiltration could be implemented. The actual infiltration pressure of the experiments is greater than the theoretical calculation value, because viscous resistance, solidification resistance and other factors are ignored in the calculation process. However, infiltration depth increases with increase in infiltration time at infiltration pressure of 7 MPa, and this verifies the correctness of the previous theoretical research results.

Low Pressure Infiltration of Molten Aluminum Alloy to Metal Fiber Preform

2007 ◽  
pp. 769-772
Author(s):  
Gen Sasaki ◽  
Yong Bum Choi ◽  
Kazuhiro Matsugi ◽  
Naoki Sorita ◽  
Shunsaku Kondoh ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Molten Aluminum ◽  
Low Pressure ◽  
Metal Fiber ◽  
Fiber Preform ◽  
Pressure Infiltration ◽  
Molten Aluminum Alloy

Low Pressure Infiltration of Molten Aluminum Alloy to Metal Fiber Preform

2007 ◽  
Vol 539-543 ◽  
pp. 769-772
Author(s):  
Gen Sasaki ◽  
Yong Bum Choi ◽  
Kazuhiro Matsugi ◽  
Naoki Sorita ◽  
Shunsaku Kondoh ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Molten Aluminum ◽  
Volume Fraction ◽  
Casting Machine ◽  
High Strength ◽  
Low Pressure ◽  
Molten Alloy ◽  
Matrix Composites ◽  
Pressure Infiltration ◽  
Molten Aluminum Alloy

In order to fabricate the metal matrix composites by low-pressure infiltration by gravity casting machine, the preform made from FeCrSi fiber with 40μm and matrix of A336.0 aluminum alloy was used. The volume fraction of fiber in preform was about 20%. The temperatures of die, preform and molten alloy were 200 oC, 400 oC and 750 oC, respectively. By controlling the infiltration of molten aluminum alloy to one direction by using barrier plate, the quantity of pores caused by curling of air degrades dramatically. Molten aluminum alloy was able to infiltrate at low pressure of 0.2MPa. As increasing the pressure, porosity in composites decreased. The composite with no pores was obtained by barrier plate and 0.8 MPa of molten alloy pressure. This composite had high strength at high temperature of 200-400oC.

scholarly journals Microstructure and compressive behavior of lamellar Al2O3p/Al composite prepared by freeze-drying and mechanical-pressure infiltration method

2020 ◽  
Vol 27 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Qiang Zhang ◽  
Shanliang Dong ◽  
Shuai Ma ◽  
Xuwei Hou ◽  
Wenshu Yang ◽  
...  
Keyword(s):  
Freeze Drying ◽  
Perpendicular Direction ◽  
Matrix Composites ◽  
Mechanical Pressure ◽  
Pressure Infiltration ◽  
Ceramic Scaffold ◽  
Al Composite ◽  
Al Matrix Composites ◽  
Infiltration Method ◽  
Al Matrix

AbstractInfiltrated molten Al matrix by mechanical-pressure infiltration method into the ceramic scaffold prepared by freeze-drying technology could prepare dense lamellar Al matrix composites without damage of the biomimetic microstructure of the scaffold. However, the investigation of lamellar Al matrix composites prepared by freeze-drying and mechanical-pressure infiltration method has not been fully understood yet. In the present work, the Al2O3 scaffold with pearl layer structure was prepared by freezing-dry method, and eventually the lamellar Al2O3p/Al composite was fabricated by mechanical-pressure infiltration method. The Al matrix was infiltrated well into the large pores of the Al2O3 scaffold, and the lamellar structure of the Al2O3 was well preserved. The hardness of the lamellar Al2O3p/Al composite was isotropic in transvers and perpendicular directions. However, the compressive strengths of the lamellar Al2O3p/Al composite were significant anisotropic while the compressive strength in transvers direction was 127.7% higher than that in the perpendicular direction, indicating the integrality of the lamellae microstructure (especially the bridging layers). Due to the mismatched deformability, weak debonding was observed between Al and Al2O3p/Al layers in the fracture surface of the lamellar Al2O3p/Al composite. It indicates that the interfacial bonding between Al and Al2O3p/Al layers is rather strong, which is beneficial for higher strength in transvers direction but lead to lower strength in perpendicular direction.

Infiltration Characteristics of Carbon Fiber Reinforced MMCs

2010 ◽  
Vol 659 ◽  
pp. 229-234 ◽  
Author(s):  
Imre Norbert Orbulov ◽  
Árpád Németh
Keyword(s):  
Carbon Fiber ◽  
Carbon Fibers ◽  
Amorphous Carbon ◽  
Volume Fraction ◽  
Matrix Material ◽  
Intermetallic Phase ◽  
Aluminum Matrix ◽  
Fiber Reinforced ◽  
Pressure Infiltration ◽  
Carbon Fiber Reinforced

Carbon fiber reinforced aluminum matrix composite blocks and a pipe (as semi-product) were produced by pressure infiltration technique. In this paper the authors deal with the production method and investigations of the blocks and the pipe. In our composites AlSi12 eutectic aluminium-silicon alloy was used as matrix material. The reinforcements were ‘A’ and ‘B’ type carbon fibers (‘A’ having lower amorphous carbon content than ‘B’). The volume fraction of the fibers was outstanding – at least 55 vol%. Scanning electron microscopic investigations were done in order to observe the rather rough surface of the carbon fibres. X-ray diffraction and energy dispersive spectrometry was done in order to estimate the quantity of Al4C3 intermetallic phase at the carbon fiber/matrix interface region. The measurements showed that the quantity of Al4C3 strongly depends on the amorphous carbon quantity in carbon fibers. Much more Al4C3 was formed in the case of ‘A’ type reinforcement (less amorphous carbon), than in the case of ‘B’ type reinforcement (more amorphous carbon). The presence of Al4C3 crystals caused large scatter in the mechanical properties, the UTS was decreased, while the compressive strength was increased. Fracture surfaces were investigated: the composite showed rigid fracture.

scholarly journals Manufacturing process of short carbon fiber reinforced Al matrix with preformless and their properties

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yongbum Choi ◽  
Xuan Meng ◽  
Zhefeng Xu
Keyword(s):  
Composite Material ◽  
Carbon Fiber ◽  
Fiber Orientation ◽  
Manufacturing Process ◽  
Low Pressure ◽  
Matrix Composites ◽  
Pressure Infiltration ◽  
Short Carbon Fiber ◽  
Short Carbon ◽  
Infiltration Method

AbstractThe conventional manufacturing process of fiber-reinforced metal matrix composites via liquid infiltration processes, preform manufacturing using inorganic binders is essential. However, the procedure involves binder sintering, which requires high energy and long operating times. A new fabrication process without preform manufacturing is proposed to fabricate short carbon fiber (SCF)-reinforced aluminum matrix composites using a low-pressure infiltration method. To improve the wettability between fiber and matrix, fibers were plated copper using an electroless plating process. The low-pressure infiltration method with preformless succeeded in manufacturing a composite with a volume fraction of about 30% of carbon fibers.The fiber orientation of the composite material manufactured without preform and the fiber orientation of the composite material manufactured using an inorganic binder was almost the same. The manufactured composites with preformless have high hardness and high thermal conductivity.

Fabrication of Continuous Nickel-Coated Carbon Fiber Reinforced Aluminum Matrix Composites Using Low Gas Pressure Infiltration Method

2013 ◽  
Vol 634-638 ◽  
pp. 1914-1917 ◽  
Author(s):  
Zhen Jun Wang ◽  
Zhi Feng Xu ◽  
Huan Yu ◽  
Qing Song Yan ◽  
Bo Wen Xiong
Keyword(s):  
Carbon Fiber ◽  
Gas Pressure ◽  
Aluminum Matrix Composites ◽  
Pressure Casting ◽  
Fiber Reinforced ◽  
A357 Alloy ◽  
Pressure Infiltration ◽  
Infiltration Pressure ◽  
Carbon Fiber Reinforced ◽  
Coated Carbon

Based on the principle of vacuum counter-pressure casting, a low gas pressure infiltration technology was developed to fabricate the Ni-coated carbon fiber reinforced A357 alloy composites. The soundness and microstructure of the as-cast composites were investigated. The results show the relative density increases with the increase of melt temperature, while it firstly increases and then declines as the fiber temperature and infiltration pressure increased. The enhancement of melt and fiber temperature can eliminate the incomplete infiltration defects and improve the uniformity of fiber distribution. The insufficient infiltration pressure leads to some micro-pores in the matrix alloy. However, the over high fiber temperature and infiltration pressure may result in the separation of nickel coating and the fiber aggregation respectively, both of which are responsible for the partial un-infiltrated or insufficient filling defects. The appropriate infiltration parameters identified in this study could provide a reference for inhibition of the hazard interfacial reactions by optimizing the low gas pressure infiltration process.

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