STUDY ON MECHANICAL PROPERTY OF POROUS TITANIUM BY ADDING POWDER CARBON

摘要

Titanium alloys have a wide variety of applications in the aerospace, automotive and biomedical industries. Furthermore, titanium carbide (TiC) has been used for reinforcement of titanium alloy matrices due to its compatibility. In this paper, under the experimental condition of 0.1 Pa, the sintering temperature of 1250°C and sintering time of 2h, the porous titanium is fabricated by powder metallurgy blend element method. The conclusions manifest that porosity has a decreasing trend with increasing the addition of carbon; however, apparent increase of porosity appears when the addition of carbon increases to 2.5 wt%. The TiC is generated in the matrix manifested from the detection results of XRD. When the carbon content achieves 1.5 wt% and 2.0wt%, the initial yield strength reaches the highest with 339.8 ±15MPa and 331.1±10MPa separately. When the content of carbon powder achieves 2.5 wt%, the initial yield strength decreases to 195.1 ± 15MPa.