The strengthening of Al2O3-Cr2O3/Cr3C2 nanocomposites has been investigated using nano-indentation technique. These composites are fabricated by metal organic chemical vapor deposition (MOCVD) using Cr(CO)6 as a precursor and Al2O3 as the matrix followed by spark plasma sintering (SPS). The nanocomposites have a higher elastic modulus and are able to endure higher plastic deformation than monolithic alumina. The microstructures of the dislocation, transgranular and stepwise fracture surfaces are observed. Moreover, Al2O3-Cr2O3/Cr3C2 nanocomposites have high hardness, fracture toughness and facture strength due to strengthening by second phase Cr3C2 particles and the solid solution of Al2O3-Cr2O3.
All Science Journal Classification (ASJC) codes
- Materials Science(all)