Innovative fabrication of porous titanium coating on titanium by cold spraying and vacuum sintering

A porous titanium coating on titanium is fabricated by cold spraying "Mg+Ti" powders followed by vacuum sintering. The porous coating is interconnected, possesses the porosity of 48.6% with pore sizes in the range of 70-150 mu m, and firmly bonds to titanium substrate with a bond strength higher than 42 MPa. The bending Young's modulus and bending strength of the porous coating are 14.47 +/- 1.21 GPa and 106.93 +/- 10.79 MPa, respectively. The compressive Young's modulus and compressive yield strength of the porous coating are 3.99 +/- 0.12 GPa and 178.66 +/- 13.20 MPai, respectively. The porous titanium coating has sufficient strength and matched Young's modulus with nature natural bone for clinical use under load bearing conditions. (c) 2008 Elsevier B.V. All rights reserved.