This study focuses on the use of bio-nanocomposite microspheres, consisting of carbonated hydroxyapatite (CHAp) nanospheres within a poly(L: -lactide) (PLLA) matrix, to produce tissue engineering (TE) scaffolds using a modified selective laser sintering (SLS) machine. PLLA microspheres and PLLA/CHAp nanocomposite microspheres were prepared by emulsion techniques. The resultant microspheres had ...

A new approach to the fabrication of individual implants and scaffolds for tissue engineering—surface selective laser sintering (SSLS)—is proposed and realized. In contrast to the conventional selective laser sintering, the SSLS method makes it possible to sinter polymer microparticles and melt the near-surface layer rather than the microparticle as a whole. The effect of the laser radiation pa...

Diamond exhibits many attractive properties including extreme hardness, high thermal conductivity, high Young’s modulus, low coefficient of friction, low wear rate, biocompatibility and chemical inertness the Institutional Repository. Therefore, diamond tools have attracted number of applications in manufacturing of various microdevices and ductile machining of brittle materials. However, just ...

Selective Laser Sintering Irem Y. Tumer David C. Thompson Graduate Research Asst. Graduate Research Asst. Richard H. Crawford Kristin L. Wood Assistant Professor Associate Professor Mechanical Engineering Department The University of Texas at Austin Abstract Surfaces of polycarbonate Selective Laser Sintering parts are investigated to determine the characteristics a ecting part quality. Surface...

This paper deals with design method for structure of injection mold fabricated by Metal Laser Sintering, which is one of the rapid prototyping technologies. This technology provides mold with more sophisticated function and improvement of formability and productivity. To realize structure of mold with these advantages, the method has been developed by following processes : (1)Specifying importa...

With more and more materials used in the Selective Laser Sintering (SLS) process, it is becoming necessary to use a database to manage the process efficiently. In this paper, a relational database for the SLS process is described. The database includes powdered material data, sintering parameters, machine characteristics, mechanical properties and surface quality of prototypes. Use of this data...

This paper investigates thermal modelling of the selective laser sintering process for amorphcus polycarbonate powders. The aim is to develop a simulation for process accuracy and control which are key areas of developement for the new layer manufacturing rapid prototyping technologies. A state-of-the-art adaptive mesh 2 0 finite difference code is used simultaneously to consider heating and si...

The use of rapid prototyping (RP) technology for rapid tooling and rapid manufacturing has given rise to the development of application-oriented composites. The present paper furnishes succinct notes of the composites formed using main rapid prototyping processes such as Selective Laser Sintering/Melting, Laser Engineered Net Shaping, Laminated Object Manufacturing, Stereolithography, Fused Dep...

OBJECTIVES This work focuses on a titanium alloy implants incorporating a gradient of porosity, from the inner core to the outer surface, obtained by laser sintering of metal powder. Surface appearance, microstructure, composition, mechanical properties and fractography were evaluated. METHODS All the specimens were prepared by a selective laser sintering procedure using a Ti-6Al-4V alloy pow...