High-strength bioresorbable Fe–Ag nanocomposite scaffolds: Processing and properties

Journal Article · Tue Oct 27 00:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4932934· OSTI ID:22492601

Sharipova, Aliya ^[1]; Psakhie, Sergey G. ^[2]; Swain, Sanjaya K. ^[1]; Gotman, Irena ^[1]

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1. Department of Materials Science and Technology, Techion-Israel Institute of Technology, Haifa, 32000 Israel (Israel)
2. Skolkovo Institute of Science and Technology, Skolkovo, 143025 (Russian Federation)

High strength ductile iron-silver nanocomposite scaffolds were fabricated employing high energy attrition milling of micron-submicron powders, followed by cold sintering/high pressure consolidation. Particulate leaching method with soluble Na{sub 2}SO{sub 4} and K{sub 2}CO{sub 3} salts as porogens was used to create scaffolds with 50, 55, 60 and 73% volume fraction of pores. Part of specimens was annealed at 600, 800 and 900°C. Specimens were characterized employing X-ray diffraction, scanning electron microscopy (SEM) with electron probe microanalysis (EDS) and high resolution SEM. Mechanical properties were measured in compression and permeability was measured in permeameter based on Darcy’s law. Scaffolds with 50% and 55% porosity exhibited high compressive strength (18–22 MPa), compressive strength of 8–12 MPa was observed for scaffolds with 73% porosity. Treatments at 800 and 900°C result in increase of strength and ductility with some coarsening of microstructure. Best combination of compressive strength (15 MPa) and permeability (0.6{sup −6} cm{sup 2}) is close to the range of trabecular bone.

• OSTI ID: 22492601
• Journal Information: AIP Conference Proceedings, Vol. 1683, Issue 1; Conference: International conference on advanced materials with hierarchical structure for new technologies and reliable structures 2015, Tomsk (Russian Federation), 21-25 Sep 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
COMPRESSION
COMPRESSION STRENGTH
DUCTILITY
ELECTRON MICROPROBE ANALYSIS
IRON
LEACHING
MICROSTRUCTURE
MILLING
PERMEABILITY
POROSITY
POTASSIUM CARBONATES
POWDERS
PRESSURE RANGE MEGA PA 10-100
SCANNING ELECTRON MICROSCOPY
SILVER
SINTERING
SODIUM SULFATES
TRABECULAR BONE
X-RAY DIFFRACTION