scholarly journals Comparative Analysis of the Oxygen Supply and Viability of Human Osteoblasts in Three-Dimensional Titanium Scaffolds Produced by Laser-Beam or Electron-Beam Melting

Materials ◽  
2013 ◽  
Vol 6 (11) ◽  
pp. 5398-5409 ◽  
Author(s):  
Anika Jonitz-Heincke ◽  
Jan Wieding ◽  
Christoph Schulze ◽  
Doris Hansmann ◽  
Rainer Bader
Keyword(s):  
Electron Beam ◽  
Comparative Analysis ◽  
Laser Beam ◽  
Electron Beam Melting ◽  
Oxygen Supply ◽  
Three Dimensional ◽  
Human Osteoblasts

scholarly journals Electron beam melting in the fabrication of three-dimensional mesh titanium mandibular prosthesis scaffold

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Rongzeng Yan ◽  
Danmei Luo ◽  
Haitao Huang ◽  
Runxin Li ◽  
Niu Yu ◽  
...  
Keyword(s):  
Electron Beam ◽  
Electron Beam Melting ◽  
Three Dimensional

scholarly journals Validation experiments for LBM simulations of electron beam melting

2014 ◽  
Vol 25 (12) ◽  
pp. 1441009 ◽  
Author(s):  
Regina Ammer ◽  
Ulrich Rüde ◽  
Matthias Markl ◽  
Vera Jüchter ◽  
Carolin Körner
Keyword(s):  
Electron Beam ◽  
Electron Beam Melting ◽  
Three Dimensional ◽  
Numerical Data ◽  
Process Window ◽  
Line Energy ◽  
Good Surface ◽  
Experimental Process ◽  
Numerical Process ◽  
Best Parameter

This paper validates three-dimensional (3D) simulation results of electron beam melting (EBM) processes by comparing experimental and numerical data. The physical setup is presented which is discretized by a 3D thermal lattice Boltzmann method (LBM). An experimental process window is used for the validation depending on the line energy injected into the metal powder bed and the scan velocity of the electron beam. In the process window, the EBM products are classified into the categories, porous, good and swelling, depending on the quality of the surface. The same parameter sets are used to generate a numerical process window. A comparison of numerical and experimental process windows shows a good agreement. This validates the EBM model and justifies simulations for future improvements of the EBM processes. In particular, numerical simulations can be used to explain future process window scenarios and find the best parameter set for a good surface quality and dense products.

Hydrothermal Modification of Products Fabricated by Electron Beam Melting

2012 ◽  
Vol 529-530 ◽  
pp. 580-583
Author(s):  
Hidetsugu Fukuda ◽  
Masato Ueda ◽  
Masahiko Ikeda ◽  
Takayoshi Nakano
Keyword(s):  
Aqueous Solution ◽  
Electron Beam ◽  
Hydrothermal Treatment ◽  
Electron Beam Melting ◽  
Three Dimensional ◽  
Free Form ◽  
Hard Tissue ◽  
Hydrothermal Modification ◽  
Ceramic Films ◽  
Surface Modification Techniques

Electron beam melting (EBM) method is one of the free-form fabrication techniques that enable near-net-shape manufacturing of complex three-dimensional, porous, and graded products, and is expected to facilitate the development of new methods for manufacturing biomaterials that could be used for hard-tissue substitutes. Titanium and its alloys have been used widely as biomaterials for hard-tissue substitutes because of their excellent mechanical properties and biocompatibility. However, the osteointegration of these materials is less than that of bioactive ceramics. Therefore, various surface-modification techniques have been developed to improve the osteointegration. The simplest way is to synthesize bioactive ceramic films on the surface of titanium or its alloys. The purpose of the present work was to synthesize a bioactive TiO2 film on Ti-6Al-4V (hereafter, abbreviated as Ti-64) substrates fabricated from powders using the EBM method and treated by a combination of chemical and hydrothermal treatment. Ti-64 plates fabricated by the EBM method were chemically treated with a H2O2/HNO3 aqueous solution under appropriate conditions. The plates were then hydrothermally treated with a NH3 aqueous solution. TiO2-gel films were produced by chemical treatment with a H2O2/HNO3 aqueous solution on the surface of a Ti-64 substrate. Anatase-type TiO2 films with high crystallinity were synthesized by the hydrothermal treatment of the TiO2-gel films.

Production and Properties of Amorphous Layers on Metal Substrates by Laser and Electron Beam Melting

1981 ◽  
Vol 8 ◽  
Author(s):  
H.W. Bergmann ◽  
B.L. Mordike
Keyword(s):  
Electron Beam ◽  
Laser Beam ◽  
Single Crystals ◽  
Electron Beam Melting ◽  
Cold Working ◽  
Amorphous Layer ◽  
Laser Glazing ◽  
Surface Layers ◽  
Metal Substrates ◽  
Amorphous Surface

ABSTRACTVarious techniques of laser glazing are presented. Rules are given for the choise of systems which are suitable for producing amorphous surface layers. Methods of demonstrating the existence of a truly amorphous layer are discussed. Two examples are given: I) electron beam glazing of Ni-Nb coated single crystals 2) laser beam glazing of Fe-B coated Fe-Cr-C cold working steel.

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