scholarly journals Evaluation of the influence of selected parameters of Selective Laser Sintering technology on surface topography

2019 ◽  
Vol 1183 ◽  
pp. 012002
Author(s):  
Cz Kundera ◽  
T Kozior
Keyword(s):  
Surface Topography ◽  
Selective Laser Sintering ◽  
Laser Sintering

scholarly journals Morphology and surface topography of Ti6Al4V lattice structure fabricated by selective laser sintering

2017 ◽  
Vol 65 (1) ◽  
pp. 85-92 ◽  
Author(s):  
J. Maszybrocka ◽  
A. Stwora ◽  
B. Gapiński ◽  
G. Skrabalak ◽  
M. Karolus
Keyword(s):  
Porous Structure ◽  
Surface Topography ◽  
Lattice Structure ◽  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Interdisciplinary Approach ◽  
Porous Metal ◽  
Laser Sintering ◽  
Qualitative Assessment ◽  
Three Dimensional Model

Abstract Construction of metallic implants with a porous structure that mimics the biomechanical properties of bone is one of the challenges of orthopedic regenerative medicine. The selective laser sintering technique (SLS) allows the production of complex geometries based on three-dimensional model, which offers the prospect of preparing porous metal implants, in which stiffness and porosity can be precisely adjusted to the individual needs of the patient. This requires an interdisciplinary approach to design, manufacturing and testing of porous structures manufactured by selective sintering. An important link in this process is the ability to assess the surface topography of the struts of porous structure. The paper presents a qualitative assessment of the surface morphology based on SEM studies and methodology that allows for quantitative assessment of stereometric structure based on micro-tomographic measurements.

scholarly journals Production and Processing of a Spherical Polybutylene Terephthalate Powder for Laser Sintering

2019 ◽  
Vol 9 (7) ◽  
pp. 1308 ◽  
Author(s):  
Rob Kleijnen ◽  
Manfred Schmid ◽  
Konrad Wegener
Keyword(s):  
Mechanical Properties ◽  
Thermal Processing ◽  
Selective Laser Sintering ◽  
Spherical Shape ◽  
Laser Sintering ◽  
Polybutylene Terephthalate ◽  
Powder Production ◽  
Injection Molded ◽  
Continuous Extrusion ◽  
Matrix Powder

This work describes the production of a spherical polybutylene terephthalate (PBT) powder and its processing with selective laser sintering (SLS). The powder was produced via melt emulsification, a continuous extrusion-based process. PBT was melt blended with polyethylene glycol (PEG), creating an emulsion of spherical PBT droplets in a PEG matrix. Powder could be extracted after dissolving the PEG matrix phase in water. The extrusion settings were adjusted to optimize the size and yield of PBT particles. After classification, 79 vol. % of particles fell within a range of 10–100 µm. Owing to its spherical shape, the powder exhibited excellent flowability and packing properties. After powder production, the width of the thermal processing (sintering) window was reduced by 7.6 °C. Processing of the powder on a laser sintering machine was only possible with difficulties. The parts exhibited mechanical properties inferior to injection-molded specimens. The main reason lied in the PBT being prone to thermal degradation and hydrolysis during the powder production process. Melt emulsification in general is a process well suited to produce a large variety of SLS powders with exceptional flowability.

Inner strut morphology is the key parameter in producing highly porous and mechanically stable poly(ε-caprolactone) scaffolds via selective laser sintering

2021 ◽  
pp. 111986
Author(s):  
Tortorici Martina ◽  
Gayer Christoph ◽  
Torchio Alessandro ◽  
Cho Simone ◽  
Schleifenbaum Johannes Henrich ◽  
...  
Keyword(s):  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Highly Porous ◽  
Key Parameter
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