Abstract
New type of structural functional materials, Ti/Al2O3 composites, were successfully fabricated by vacuum hot-pressing sintering at 1350 °C, 1400 °C, 1450 °C, and 1500 °C under a pressure of 30 MPa with a holding time of 90 min. The brittle TiAl and Ti3Al phases, which were regarded as detrimental to the mechanical performance, were present in the reaction products, as observed in X-ray diffraction patterns. Therefore, metallic Nb was introduced into the system to explore its inhibitory effect between Ti and Al2O3. The EDS and EPMA results illustrated that Nb played an active role in inhibiting interfacial reactions. Moreover, the mechanical properties and microstructure of the composites were improved owing to Nb doping.
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