A new casting process for carbon (or SiC-based) fibre-aluminium matrix low-cost composite materials

Processing of silicon carbide–boron carbide–aluminium composites

“…In all these cases the molten metal matrix is hindered from coming into contact with the surface of the individual particles. [3][4][5][6][7] Various procedures have been recommended to improve the wetting of ceramic particles by liquid metal, and include: (i) increasing metal liquid temperature, 8 (ii) the addition of some surface-active/reactive elements such as Mg, Li, Ca, Ti, or Zr into the matrix alloy, [9][10][11][12][13] (iii) coating or oxidising the ceramic particles, [14][15][16][17][18] and (iv) cleaning the particles, for example by preheat treatment. [19][20][21] The principle methods to improve wetting * Corresponding author.…”

Fabrication and Studying the Mechanical Properties of A356 Alloy Reinforced with Al<sub>2</sub>O<sub>3</sub>-10% Vol. ZrO<sub>2</sub> Nano-particles through Stir Casting

“…Generally, wettability of the reinforcement ceramic particles by a liquid metal is very poor. Good wetting between ceramic particles and liquid metals leads to a proper bonding between these two during and after casting.Various techniques like pretreatment of particles [11], adding elements such as magnesium and lithium into the matrix as surface active agents [12,13], coating or oxidizing the ceramic particles [14,15], cleaning the particle surface by ultrasonication and different etching methods [16,17] have been tried to improve wettability. Among various techniques to fabricate metal matrix composites reinforced with ceramic particles, stir casting is one of acceptable routes for commercial production.…”

Studies on carbon fibre reinforced aluminium composite processed using pre-treated carbon fibres

“…In the present case the Zr 3d5/2 peak was found at 182.2 eV strongly suggesting the presence of ZrO 2 on the carbon fibres extracted from the C/A1 composite. Rocher et al [5] suggested that depending on the composition of the matrix, K2ZrF 6 reacts with aluminium matrix leading to the formation of either ZrA13 or ZrSi 2 as represented by the following reactions 3KzZrF 6 + 4A1 --* 4A1F 3 + 6KF + 3Zr…”

“…in order to achieve good wetting during infiltration [1][2][3][4]. More recent and entirely different approach to overcome the problem of wetting in C/A1 composites is by pre-treatment of the carbon fibre with KzZrF 6 [5,6]. Present work deals with characterization of the C/A1 composite fabricated by KzZrF 6 pre-treatment route.…”