Abstract
A new fabrication process without preform manufacturing has been developed for carbon short fiber (CSF) reinforced various aluminum matrix composites. And their mechanical and thermal properties were evaluated. Electroless Ni plating was conducted on the CSF for improving wettability between the carbon fiber (CF) and aluminum. It was confirmed that pores in Ni plated CSF/Al and Al alloy matrix composites prepared by applied pressure, 0.8 MPa, had some imperfect infiltration regions between the CF/CF and CF/matrix in all composites. However, pores size in the region between the CF/CF and CF/matrix to use the A336 matrix was about 1 µm. This size is smaller than that of other aluminum-based composites. Vickers hardness of Ni plated CSF/A1070, A356 alloy, and A336 alloy composites were higher as compared to matrix. However, the A1070 pure aluminum matrix composite had the highest hardness improvement. The Ultimate tensile strength of the A1070 and A356 aluminum matrix composite was increased due to carbon fiber compared to only aluminum, but the Ultimate tensile strength of the A336 aluminum matrix composite was rather lowered due to the highest content of Si precipitate and large size of Al3Ni compounds. The Thermal Conductivity of Ni plated CSF/A1070 composite has the highest value (167.1 W·m−1·K−1) as compared to composites.
Highlights
In the fields of thermal management and engineering applications, composite materials with high thermal conductivity (TC) and high mechanical properties that are lightweight are expected to be utilized as an alternative to existing materials such as heat sink material [1,2] or internal engine parts [3,4]
Aluminum is a dominant matrix for fabricating composite, carbon fiber (CF)-reinforced aluminum composite can combine the superior characteristics of CF and Al matrix; CF/Al matrix composites can be the promising materials for the heat sink components or structural material with high TC, are lightweight, and have good workability
3a–c, it is observed that the carbon short fiber (CSF) were randomly distributed in the composites, white phases were formed that the CSFs were randomly distributed in the composites, white phases were formed around CSFs and some were dispersed in the matrix
Summary
In the fields of thermal management and engineering applications, composite materials with high thermal conductivity (TC) and high mechanical properties that are lightweight are expected to be utilized as an alternative to existing materials such as heat sink material [1,2] or internal engine parts [3,4]. The analysis of the effect of the matrix with various alloying elements on the properties of CF/Al matrix composites has been rarely studied. The alloying elements of the matrix (such as silicon and nickel) make an important impact thermal and mechanical properties of composites. A suitable manufacturing process for AMCs is the point for achieving high-performance composites with a good combination of reinforcement and matrix. The problems associated with the fabrication of CF-reinforced Al matrix composites are the poor wettability and chemical reactions between the carbon and Al matrix. A new process without preform manufacturing was developed for carbon short fiber (CSF) reinforced various aluminum matrix composites, and the effect of the matrix with various alloying elements on the thermal and mechanical properties of composites has been investigated
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
