Study of fracture toughness in B4C-TiB2 Nanocomposites with Vickers indentation test method at different loads

According to widespread and increasing efficiency of ceramics in different industries, identification their mechanical properties with minimum time and cost is important for the optimal design. In this paper, B4C nanocomposite samples with a volume of 10% of TiB2were prepared and the values of density, hardness and Elasticity modulus were determined and then the fracture toughness values were calculated by using various fracture toughness formula with Vickers indentation test method in loads of 100N and 150N and their results were compared to each other. The results show that the modified equation with using cracks leads high accuracy and efficiency compared to other relations. It also concluded that the growth mechanism due to different loads affects on the results of fracture toughness values.