Pressure infiltration of liquid aluminium into packed SiC particulate with a bimodal size distribution

Anisotropy in thermal conductivity of graphite flakes–SiCp/matrix composites: Implications in heat sinking design for thermal management applications

“…For infiltration with Al-12Si alloy, a solid piece of the metallic alloy was placed on top of the packed preform and, prior to melting, the sample was transferred into a cold-wall heating chamber where primary vacuum was applied in order to facilitate infiltration and reduce porosity (see [20,21] for equipment details; see [10,17,21,22] for details on infiltration process). Then, the temperature was raised up to 700ºC (Al-12Si alloy) and nitrogen was introduced into the pressure chamber until a pressure of 25 bars was reached.…”

Decreasing the infiltration threshold pressure of Al–12wt% Si into alumina particle compacts by Sn or Pb layers

“…Using these data, and the length of the packed powder, a particle volume fraction V p of 0.57 ± 0.01 was obtained. The density of the particles used in this determination is 3.96 g/cm 3 . In some samples a thin layer (3 mm thick) of either tin or lead was placed between the particle compact and the alumina paper.…”

“…The infiltration apparatus used to determine the threshold pressure and the infiltration kinetics was described in detail elsewhere [2,3]. The Al-12Si alloy and the pure metals were melted in alumina crucibles, degassed and cleaned by bubbling argon gas during at least 30 min.…”

“…During the last decades, gas pressure infiltration of liquid metals into preforms of ceramic or graphite particles has been put forward as a very efficient process for the fabrication of Metal Matrix Composites (MMC) [1][2][3][4]. At present, this method is one of the best suited to the fabrication of composites containing high volume fractions of reinforcement, having, in addition, the capability of near neat-net shape production.…”

Plasma And Cold Sprayed Aluminum Carbon Nanotube Composites: Quantification Of Nanotube Distribution And Multi-Scale Mechanical Properties

“…This is deduced from the fact that the specific heat capacity of C (Graphite) and Al-12%Si alloy at 2300K is equal to 2.145 J.g where h is the infiltrated depth of the metal into the porous compact, k p is the intrinsic permeability of the compact,  is the viscosity of melt, t is the infiltration time, V p is the particulate volume fraction and P is the applied pressure. P 0 is the threshold pressure for infiltration to occur and is governed by the capillary forces and is given by [234]   comes to rest in 1 s forming a splat of 100 m, the pressure generated due to impact is found to be ~4 MPa, which is orders of magnitude smaller than P 0 . Hence, it is concluded that infiltration of the CNT clusters during impact is rather unlikely.…”