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Experimental and Theoretical NANOTECHNOLOGY

About the Journal :

Experimental and Theoretical NANOTECHNOLOGY (ETN) abbreviated as Exp. Theo. NANOTECHNOLOGY is a multidisciplinary peer-reviewed and open access journal. It includes specialized research papers, short communications, reviews and selected conference papers in special issues on the characterization, synthesis, processing, structure and properties of different principles and applications of nanotechnology with focus on advantageous achievements and applications for the specialists in engineering, chemistry, physics, materials science and medicine. ETN covers and publishes all aspects of fundamental and applied researches of experimental and theoretical nanoscale technology dealing with materials synthesis, processing, nanofabrication, nanoprobes, spectroscopy, properties, biological systems, nanostructures, nanoelectronics, nano-optics, nano-mechanics, nanodevices, nanobiotechnology, nanomedicine, nanotoxicology within the scope of the journal. ETN aims to acquire the recent and outstanding researches for the benefit of the human being.



DEVELOPMENT OF STEP-WISE FUNCTIONALLY GRADED MATERIALS NANO (3YPSZ/AL2O3) WITH IMPROVED FRACTURE TOUGHNESS AND LOW THERMAL DEGRADATION FOR HIP JOINT REPLACEMENTS


Abstract:

In this work high order (10 layers) step – wise functionally graded materials (FGM) of nano 3Y- tetragonal zirconia poly crystals (3YPSZ) and nano alumina (Al2O3) successfully prepared by powder technology technique. “Fracture toughness and hardness were measured by using indentation methods”. Low thermal degradation (LTD) was done at 134 ºC and 0.2 bar in autoclave, the amount of monoclinic phase of ZrO2 (m – phase) on the exposed surface was calculated by X-ray’s diffraction (XRD). Results showed prevent of m – t transformation after 40 hr in all FGM specimens, high fracture toughness along cross – section of specimens due to increase of zirconia content, which tetragonal phase is toughening agent. SEM observations and EDS analytic a long cross – section of specimen showed good distributed of 3YPSZ from EDS analytic and there were no agglomerates, some pores appear due to binder material that was used in pressing process.

Keywords: FGM; alumina; 3YPSZ; LTD; fracture toughness.