Optimization of Selective Laser Sintering Process Parameters Based on PA12 Powders for Bone Tissue Scaffolds

2021 ◽  
Author(s):  
Ran Yan ◽  
Changjiang Xie ◽  
Ze Zhao ◽  
Junchao Li
Keyword(s):  
Bone Tissue ◽  
Process Parameters ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Tissue Scaffolds ◽  
Sintering Process

Experimental Study on Warping Height of PA12/HDPE Specimen by Selective Laser Sintering

2010 ◽  
Vol 43 ◽  
pp. 430-433
Author(s):  
Nai Fei Ren ◽  
Pan Wang ◽  
Yan Luo ◽  
Hui Juan Wu
Keyword(s):  
Process Parameters ◽  
Selective Laser Sintering ◽  
Single Layer ◽  
Dimensional Accuracy ◽  
Laser Sintering ◽  
Sintering Process ◽  
Influence Of Process Parameters ◽  
Optimum Parameters ◽  
Scan Speed ◽  
The Relationship

The dimensional accuracy and mechanics properties of parts made by Selective Laser Sintering depend greatly on the sintering process parameters. The influence of process parameters on warping weight of parts sintered by blends of polyamide (PA12) and high density polyethylene (HDPE) was studied. The relationship between the process parameters and the warping height was presented. The surface morphology of the part and uniformity of powder mixed were analyzed by SEM. The optimum parameters of minimum warping height were obtained: preheat temperature 110°C, scan speed 300mm/s, laser power 21W, thickness of single layer 0.2mm.

Optimization of Selective Laser Sintering Process Parameters on Surface Quality

2018 ◽  
pp. 141-157 ◽  
Author(s):  
M. Akilesh ◽  
P. R. Elango ◽  
A. Achith Devanand ◽  
R. Soundararajan ◽  
P. Ashoka Varthanan
Keyword(s):  
Surface Quality ◽  
Process Parameters ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Sintering Process

Preparation and Selective Laser Sintering Mechanism of Polymer-Coated Mo Powder

2010 ◽  
Vol 148-149 ◽  
pp. 511-514 ◽  
Author(s):  
Bin Liu ◽  
Pei Kang Bai ◽  
Yu Xin Li
Keyword(s):  
Viscous Flow ◽  
Process Parameters ◽  
Early Stage ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Molybdenum Powder ◽  
Sintering Process ◽  
Major Mechanism ◽  
Sintering Mechanism

A multi-component polymer-coated molybdenum powder was chosen for selective laser sintering (SLS). A novel preparing method of polymer-coated molybdenum powder was presented. The effect of the process parameters on the part’s characteristics is investigated. Based on our study for dynamic laser sintering process of polymer-coated molybdenum powder, its laser sintering mechanism was reported as follows: at the early stage of laser sintering, the viscous flow is the major mechanism; during the laser sintering, the melting/solidification is the major mechanism. Furthermore, a model corresponding to the mechanism was discussed schematically, which could be used to explain the material migrating mode during laser sintering process.

scholarly journals Influence of the selective laser sintering process parameters on the physical properties of spatial model of the ceramic implant

Mechanik ◽  
2016 ◽  
pp. 1196-1197
Author(s):  
Barbara Staniewicz-Brudnik ◽  
Andrzej Stwora ◽  
Małgorzata Karolus ◽  
Grzegorz Skrabalak ◽  
Elżbieta Bączek
Keyword(s):  
Physical Properties ◽  
Process Parameters ◽  
Spatial Model ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Sintering Process ◽  
Ceramic Implant

Researches Concerning the Phenomena at the Interface for the Sintered Compacts of Titan-Hydroxyapatite

2013 ◽  
Vol 856 ◽  
pp. 164-168 ◽  
Author(s):  
Diana Irinel Băilă
Keyword(s):  
Specific Surface ◽  
Bone Tissue ◽  
Contact Zone ◽  
Cellular Differentiation ◽  
Selective Laser Sintering ◽  
Important Process ◽  
Sintering Process ◽  
Cellular Processes ◽  
Hydroxyapatite Powder ◽  
Ti Powder

The behaviour of metallic powders is very important for manufacturing parts and for realize the prototypes. Manufacturing of the orthopaedic implants by selective laser sintering process can be used in medicine. The powders necessary for SLS process are biomaterials who must assure a good osteointegration of endobone implants like the Ti powder (Ti-6Al-4V) and the hydroxyapatite powder. The conditioned powders is a very important process and is necessary in SLS to obtain medical prothesis and influence the final properties of prothesis. Materials must present a gradient for porosity and one for composition (presents of a bioactive phase in titan matrix). The exterior porosity, in the contact zones with the bone tissue, favors the incipient cellular processes (the adhesion and attachment of osteoblastes, proliferation and cellular differentiation and nucleation of mineral bone). The pores must be open and with a specific surface more great. Its preferred the exterior intercommunicating porosity. The presence of phosphates of calcium in the contact zone of the implant with bone favors the mineral kernel on bone. The report Ca/P of phosphates mineral bone has an ascending evolution towards 10/6 according to hydroxyapatite.

Research on Warpage of Polystyrene in Selective Laser Sintering

2010 ◽  
Vol 43 ◽  
pp. 578-582 ◽  
Author(s):  
C.Y. Wang ◽  
Q. Dong ◽  
X.X. Shen
Keyword(s):  
Layer Thickness ◽  
Process Parameters ◽  
Laser Power ◽  
Selective Laser Sintering ◽  
Scanning Speed ◽  
Laser Sintering ◽  
Main Process ◽  
Influence Of Process Parameters ◽  
Temperature Changes ◽  
Hatch Spacing

Warpage is a crucial factor to accuracy of sintering part in selective laser sintering (SLS) process. In this paper, The influence of process parameters on warpage when sintering polystyrene(PS) materials in SLS are investigated. The laser power, scanning speed, hatch spacing, layer thickness as well as temperature of powder are considered as the main process parameters. The results showed that warpage increases with the increase of hatch space. Contary to it, warpage decreases with the increase of laser power. Warpage decreases with the increase of layer thickness between 0.16~0.18mm and changes little with increase of the thickness. Warpage increases along with the increase of scanning speed but decreases when the speed is over about 2000mm/s. When the temperature changes between 82°C-86°C, warpage decreases little with the increase of temperature. But further increase of temperature leads to warpage decreasing sharply when the temperature changes between 86°C-90°C.

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