Study On Effect Of Nanosilica Sand Addition On Physical And Mechanical Properties Of Alumina Powder

Ceramic Matrix Composites is becoming more and more reliable materials in the industry. Advanced Ceramic Engineering development has been done making the process as well as cost in producing the Ceramic Matrix Composites become lesser and more reliable. The study is being done to observe the effects or differences that occur due to variation of alumina and silica sand nanoparticle to the alumina-silica sand nanoparticles composites. The objective of the study is to establish the effect of silica sand nanoparticles addition on the mechanical and physical properties of alumina based composites. The problem of the study is to find the most optimum or suitable composition in order to enhance the composites usage in the industry. The powder metallurgy technique was used with an uniaxial dry pressing. The green samples were sintered at 1100 °C temperature in argon atmosphere for two, four and six hours of sintering time according to the sample set. It was observed that the green and sintered density of the samples decreased along with the increase in the silica-sand nanoparticles content. The hardness of the sintered composites increased with the increased of silica sand nanoparticles content. The sintered density of the samples was increased with the sintering time up to four hours and decreased at six hours sintering time. The sintered microstructure analysis indicated that the diffusion of silica sand nanoparticles to the pores was formed. The maximum density produced is 3.367 g/cm3. The maximum hardness produced is 70.8 HRB. As a conclusion to this, the experiment proves that different composition of alumina powder and silica sand nanoparticles mixture will produced different mechanical and physical properties of the alumina-silica sand nanoparticles composites produced.