Fabrication of Ti/cluster diamond/TiC in situ composites

The present study describes on the fabrication process utilizing in situ method, and the microstructures and mechanical properties of Ti/CD/TiC composites. Ti powder of commercial purity, and GCD are mechanically mixed at 300 rpm, and are then consolidated by hot pressing in vacuum. In order to investigate the influence of processing parameters on the microstructure and mechanical properties, the mechanical mixing time and consolidating temperature are varied. XRD analysis indicates that the addition of GCD to Ti derived the in situ reaction of TiC under all of the consolidating temperatures used, consequently it could achieve to fabricate the Ti/CD/TiC composite expected. Microstructural observation shows that the Ti/CD/TiC composite fabricated had fine grain structure, in which many fine particles composed of TiC and diamond were dispersing. The resulting mechanical strength was enhanced substantially with an increase in the consolidating temperature and mechanically mixing time.