I.c.engines

Investigation of thermal properties of epoxy composites embedded with Aluminum Nitride (AlN) micro-fillers is estimated in the present thesis with help of the experimental and ANSYS results. Thermal conductivity of AlN powder filled epoxy composite is calculated by measuring temperature difference at two surfaces by using instruments thermal heater and thermal laser gun. The samples of composites prepared with AIN for three different sizes of AIN powder particles [AIN particles size 1)70µm 2)80µm 3)90µm]. For each size three samples are prepared with different concentration of AIN powder[AIN concentration by wt. 1)10 gm 2)20 gm 3)30 gm].The numerical results obtained by using the ANSYS software. The effective thermal conductivity values obtained from experimentally validate with ANSYS results. It is observed that The conductivity values measured experimentally are compared with the ANSYS results. These Epoxy composites with AlN and glass fiber have been fabricated and thermal conductivities of the samples are calculated by using experimentally obtained temperature values. Observations can be made that with At highest testing temp. 80ºC for size 70µm of AIN particles we get  thermal conductivity of epoxy composites for sample 20weight %(30gm AIN powder out of total weight of sample) has increased by 30 times than epoxy. Epoxy composites with 80µm size of AIN particles the sample with 20 % of AIN gives thermal conductivity at heater temp.80ºC has increased by about 32 times than epoxy. For 90 µm size AIN particles samples at heater temp.80ºC we found better thermal conductivity for sample with 20%AIN particles out of the nine samples the thermal conductivity of epoxy has increased by 34 times as compare to epoxy. A conclusion to draw from the measured values we got better thermal conductivity of epoxy composites with 20% of AIN with size of 90µm.Increase of thermal conductivity of epoxy composites with increase of size and percentage of AIN powder.