Preparation and pore properties of Cu doped Ti-Si porous membrane materials
The Cu-doped Ti-Si intermetallic porous membrane materials were successfully prepared by pressure in-situ reaction sintering.The Ti-Si porous membrane materials prepared at different sintering temperature and Cu doping amounts were characterized by scanning electron microscope(SEM),energy dispersive spectrometer(EDS),X-ray diffractometer(XRD)and electronic universal testing machine.The experimental results showed that the main phase of the membrane was Ti5Si3,accompanied by a small amount of TiCu and Ti-O compound secondary phase formation.The surface particle size of the Ti-Si porous membrane was 0.5-2 μm,and the thick-ness of the membrane layer was 6-10 μm.With the increase of Cu powder doping amounts or sintering tempera-ture,the maximum bubble pore size and the relative permeability coefficient decreased.The maximum bubble pore size is between 24-29 μm,and the relative permeability coefficient ranged from 33 to 97 m3/(m2·h·kPa).Cu doping can promote the in-situ reaction of Ti-Si system.It accelerated the formation of Ti5Si3 porous membrane and increased the bonding strength between the membrane layer and the substrate.When the Cu do-ping amount was 5wt％with the sintering temperature of 900 ℃,the membrane/substrate bonding strength of the prepared sample reached up to 19.18 MPa.
万方数据
维普
