Adoption of powder metallurgy technique used aluminum as the metal matrix with 99.7% purity and ≥03μm particle size reinforced with alumina (Al2O3) 99.7% purity with 53 μm in size and Silicon Carbide (SiC) 99.7% purity with ≥95μm in size to prepare the (Al - 10wt% Al2O3– 20wt%SiC) composite, these composites were cold pressed through uniaxial pressing at different pressure of (500,600,700,800,900)MPa and sintered at 550oC for one hour. The composite products were treated thermally using both rapid isothermal heating and traditional heating at temperature 400oC for 15min and then cooled in steady air. The research aims to study the effect of pressing pressure, heat treatments on the properties of the samples since it was found that the physical properties (density, porosity and thermal conductivity) increases with increasing pressing pressure and increase significantly after heat treatment (rapid isothermal heating and traditional heating) was accompanied by an increase in the mechanical properties (hardness, compressive strength ).

The current research aimed to study the effect of fraud in the diesel fuel on environmental pollution, the study included two samples of diesel fuel., first sample is used currently in all diesel engines vehicles, and it produced in colander of oil of Baiji, the second sample is producer manually from mixing of the Lubricating oils and kerosene with ratio (1/40), were prepared and tested in research laboratories and quality control of the North Refineries Company /BAIJI by using standard engine (CFR). comparison between two models of fuel in terms of the properties of the mixing fuel and the properties of diesel fuel standard. The results proved that the process of mixing these , leading to the minimization of Cetane number and flash point. While the viscosity increase in mixing fuel, comparison with fuel producer in the refinery, and which identical to the minimum standard specifications of diesel fuel. The tests had been carried out using the engine of (TQ) four stroke type (TD115) with a single-cylinder and compression ratio (21:1) a complement to the hydraulic type Dynamo meter (TD115). Results proved that, by using manually mixed fuel the performance of the engine is decreased, and the break power is reduced to (6.49%) compared with (5.6%) for fuel produced in refinery at speed (2750 RP.M). also at the same speed the specific fuel consumption increase (5.6%) for the same compared . At the same speed the brake thermal efficiency and the volumetric efficiency are decreased by 5.7% and 3.12% respectively. While m the exhaust temperature are increased by 3.9% . The emissions also increase from the engine when using the fuel which produced from the mixing operation, were the increasing of (CO) and (HC) (9.5%) and (4.6%) respectively, from their values upon using the fuel which was produced in refinery.