title: Preparation and properties of biomedical porous titanium alloys by gelcasting.
abstract: Porous titanium alloys have been prepared by gelcasting in this study. The elastic solid green body was first polymerized and then vacuum sintered to porous titanium alloys with low contamination by controlling sintering conditions. The microstructure and the total porosity of the vacuum sintered porous Ti-Co and Ti-Mo alloys were analyzed by using scanning electron microscopy and x-ray diffraction. Moreover, compression and bending tests were conducted to investigate their mechanical properties. The results show that open and closed three-dimensional pore morphologies and total porosity ranging from 38.34% to 58.32% can be achieved. In contrast to porous Ti by gelcasting, the compression and bending strengths of porous titanium alloys were significantly increased by adding Mo and Co with Young's modulus ranging between 7-25 GPa, which is close to that of human cortical bone, therefore being suited for potential application in load-bearing implants.
authors: Advanced Material & Technology Institute, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China. ydh190@gmail.com
authors: Donghua
authors: D
authors: Yang
authors: Huiping
authors: H
authors: Shao
authors: Zhimeng
authors: Z
authors: Guo
authors: Tao
authors: T
authors: Lin
authors: Lianpeng
authors: L
authors: Fan
mesh_terms: D000497:Alloys / Q000737:chemistry*; D001672:Biocompatible Materials / Q000737:chemistry; D018786:Bone Substitutes; D001842:Bone and Bones / Q000473:pathology; D003035:Cobalt / Q000737:chemistry; D019245:Compressive Strength; D004867:Equipment Design; D005782:Gels; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning / Q000379:methods; D008982:Molybdenum / Q000737:chemistry; D016062:Porosity; D011312:Pressure; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D000497:Alloys; D001672:Biocompatible Materials; D018786:Bone Substitutes; D005782:Gels; D003035:Cobalt; D008982:Molybdenum; D014025:Titanium