Characterization of the porous structures of the green body and sintered biomedical titanium scaffolds with micro-computed tomography
Journal Article
·
· Materials Characterization
The present research was aimed at gaining an understanding of the porous structure changes from the green body through water leaching and sintering to titanium scaffolds. Micro-computed tomography (micro-CT) was performed to generate 3D models of titanium scaffold preforms containing carbamide space-holding particles and sintered scaffolds containing macro- and micro-pores. The porosity values and structural parameters were determined by means of image analysis. The result showed that the porosity values, macro-pore sizes, connectivity densities and specific surface areas of the titanium scaffolds sintered at 1200 °C for 3 h did not significantly deviate from those of the green structures with various volume fractions of the space holder. Titanium scaffolds with a maximum specific surface area could be produced with an addition of 60–65 vol% carbamide particles to the matrix powder. The connectivity of pores inside the scaffold increased with rising volume fraction of the space holder. The shrinkage of the scaffolds prepared with > 50 vol% carbamide space holder, occurring during sintering, was caused by the reductions of macro-pore sizes and micro-pore sizes as well as the thickness of struts. In conclusion, the final porous structural characteristics of titanium scaffolds could be estimated from those of the green body. - Highlights: •Porous structures of green body and sintered titanium scaffolds was studied. •Porous structures of both samples were quantitatively characterized with micro-CT. •Porous structures of scaffolds could be controlled from the green body. •Shrinkage mechanisms of titanium scaffolds during sintering was established.
- OSTI ID:
- 22689647
- Journal Information:
- Materials Characterization, Journal Name: Materials Characterization Vol. 121; ISSN 1044-5803; ISSN MACHEX
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effects of Sintering Temperature on the Porosity and Mechanical Behavior of Porous Titanium Scaffolds Prepared by Freeze-Casting
Microstructure, Mechanical Properties and Corrosion Behavior of Porous Mg-6 wt.% Zn Scaffolds for Bone Tissue Engineering
Micro-CT analysis and mechanical properties of Ti spherical and polyhedral void composites made with saccharose as a space holder material
Journal Article
·
Sun Sep 15 00:00:00 EDT 2019
· Journal of Materials Engineering and Performance
·
OSTI ID:22970495
Microstructure, Mechanical Properties and Corrosion Behavior of Porous Mg-6 wt.% Zn Scaffolds for Bone Tissue Engineering
Journal Article
·
Thu Mar 15 00:00:00 EDT 2018
· Journal of Materials Engineering and Performance
·
OSTI ID:22858043
Micro-CT analysis and mechanical properties of Ti spherical and polyhedral void composites made with saccharose as a space holder material
Journal Article
·
Sat Feb 14 23:00:00 EST 2015
· Materials Characterization
·
OSTI ID:22476027