Composites matching the properties of human cortical bones: The design of porous titanium-zirconia (Ti-ZrO2) nanocomposites using polymethyl methacrylate powders
MetadataShow full item record
Bone-like low elastic modulus micro-porous titanium (Ti) and titanium-zirconia (Ti-ZrO2) nanocomposites were fabricated by a pressureless sintering process with biocompatible polymethyl methacrylate (PMMA) powders as the pore-forming agents. A microstructural analysis revealed that the method can successfully make randomly distributed pores in the sintered monolithic and nanocomposite, and the pore-forming agents can be removed by a heat treatment process. The material properties, i.e., the relative density, pore morphology, microhardness and elastic modulus, can be dramatically altered with the pore-forming agent. Moreover, the porous Ti-based nanocomposites produced in this way (50 vol% PMMA) have interconnected pores, higher biocompatibility, better mechanical properties and well controlled the Ti grain size, when compared with the monolithic porous Ti bodies through the second phase strengthening mechanism. The elastic moduli of the highly porous monolithic Ti and Ti-ZrO2 nanocomposites can be controlled to be about 20.0 and 22.4 GPa, respectively, which are almost the same as human cortical bones (7-25 GPa).
Showing items related by title, author, creator and subject.
Li, Chao (2012)The purpose of this dissertation was to synthesize and evaluate porous poly(2- hydroxyethyl methacrylate) (PHEMA) and PHEMA composite hydrogels containing various concentrations of titanium dioxide (TiO2) nanoparticles, ...
Rajaeian, Babak (2012)Thin film composite (TFC) membranes have long been used by many large-scale applications (i.e., water and wastewater treatment). Recently, conventional polymeric TFC membranes are facing with short longevity due to high ...
Liu, Huihua; Nakagawa, K.; Chaudhary, Deeptangshu; Asakuma, Y.; Tade, Moses (2011)Freeze-dried macroporous foams were prepared from an aqueous colloidal suspension of chitosan/xanthangum/Na+-montmorillonite nanoclay (MMT). The suspension formed gel structure as a consequence of freezing, named cryogel. ...