Abstract
The porous titanium sheet of 0.5 mm thickness was developed by the method of doctor blade using the spherical titanium powder with high quality. In this study, material properties of the Ti sheet were investigated by various evaluation methods. The properties investigated are porosity, mean pore diameter, tensile strength, deflective strength, bubble point pore diameter and air flow rate characteristic. This sheet made from spherical powder can keep its original particle shape and point contact each other by selecting the optimum sintering temperature. When the sintering temperature goes up, its porosity becomes lower than 45%. Tensile strength and deflective strength increase linearly with reducing the porosity, and can reach more than 100 MPa. Bubble point pore diameter ranges from 32 to 44μm. Differential pressure of this sheet by air flow is lower than that of the filter made from the irregular shape powder, and it can be further decreased by reducing the thickness of the sheet. The results mentioned above suggest that this porous titanium sheet has the excellent characteristics as the sintered metal filter.
