Microstructure and Mechanical Properties of Ti-TiH2 Based Matrix Composites Reinforced with xTiB2 Particles Processed by Powder Metallurgy

The structure changes, microstructure evolution, and mechanical properties during Powder Metallurgy (PM) through High Vacuum Sintering of a Ti-TiH2 matrix reinforced with Titanium Diboride (TiB2) particles were investigated. Composites fabricated at 850, 1100, 1300 °C. strategy for the fabrication process was to use PM route employing titanium hydride (TiH2) reduce consumption Commercially Pure (CP-Ti). composites analyzed using X-Ray Diffraction (XRD), while Optical Microscopy (OM), Field-Emission Scanning Electron (FE-SEM) analysis used study microstructure. Vickers microhardness nanoindentation performed evaluate elastoplastic properties. According results, unreinforced sample presented higher sinter-ability, attaining relative density values 93% sintering temperature. Composite samples showed TiB TiB2 phases without presence any TiH2 residual phase. highest measured 30 vol.% TiB2, sintered °C, showing 509.29 HV 4.94 GPa microindentation essays, respectively, which resulted in 8.5% than sample. In addition, their H/Er H3/Er2 ratios are those CP-Ti suggesting better wear resistance matrix-reinforced samples, combined its makes it more suitable potential biomedical applications.