Synthesis, crystallographic characterization, and mechanical behavior of alumina chromia alloys

Powder mixtures of Alumina and Chromia, blended in different proportions (1, 3, 5 10%wt) by attrition milling, were fired either pressureless sintering air hot pressing under vacuum. The resulting materials, characterized X-ray diffraction, Raman spectroscopy, SEM, hardness fracture toughness showed that all the compositions form complete solid solution which maintain same crystal structures corundum; chromia addition retards materials' densification samples but not hot-pressed samples. Data from spectroscopy SEM/EDXS appearance Ti- Mn-based impurities near indentation print, particular on fractured grains. improves hardness, does affect is, other hand, greatly influenced materials’ residual porosity.