Publication detail

Spark plasma extrusion of binder free hydroxyapatite powder

DÍAZ DE LA TORRE, S. MUNOZ-JUAREZ, I. MENDEZ-GARCIA, J. GONZALEZ-CORRAL, G. CASAS LUNA, M. MONTUFAR JIMENEZ, E. OLIVER-URRUTIA, C. PINA-BARBA, M. ČELKO, L.

Original Title

Spark plasma extrusion of binder free hydroxyapatite powder

Type

journal article in Web of Science

Language

English

Original Abstract

This work explores the possibility of manufacturing dense and nanocrystalline hydroxyapatite (HA) large monoliths by spark plasma extrusion (SPE). This method combines uniaxial mechanical compression, high temperature, and electromagnetic field to promote the extrusion and sintering of HA powder in one single step. The results show that the binder-free extrusion of pre-compacted HA powder is feasible at a temperature similar to the temperature at which nanocrystalline HA shows superplastic behavior. The extrusion continues throughout the sliding and rotation of the particles, and also due to the grain boundary sliding, up to the point where no more material is available, thus producing monoliths of nearly 30 mm in length and 10 mm in diameter. The dehydration and smooth surface of the powder appear as paramount factors to facilitate the HA extrusion without additives. The extruded HA preserved the stoichiometry and nanometric grain size and exhibited preferential microstructural alignment in the direction of extrusion. The material experiences local thermal and pressure gradients during extrusion, producing different densification and hardness along its length. The SPE of HA will benefit the healthcare field by offering new processing approaches of bone substitutes and osteosynthesis devices.

Keywords

hydroxyapatite; spark plasma extrusion; sintering; nanocrystalline; superplasticity; grain boundary sliding; spark plasma sintering

Authors

DÍAZ DE LA TORRE, S.; MUNOZ-JUAREZ, I.; MENDEZ-GARCIA, J.; GONZALEZ-CORRAL, G.; CASAS LUNA, M.; MONTUFAR JIMENEZ, E.; OLIVER-URRUTIA, C.; PINA-BARBA, M.; ČELKO, L.

Released

17. 6. 2022

Publisher

De Gruyter

Location

WARSAW

ISBN

2191-9089

Periodical

Nanotechnology Reviews

Year of study

11

Number

1

State

Federal Republic of Germany

Pages from

2295

Pages to

2303

Pages count

9

URL

https://www.degruyter.com/document/doi/10.1515/ntrev-2022-0131/html

Full text in the Digital Library

http://hdl.handle.net/11012/208174

BibTex

@article{BUT178433,
  author="Sebastian {Díaz de la Torre} and Isaac {Munoz-Juarez} and Jose C. {Mendez-Garcia} and Gisela {Gonzalez-Corral} and Mariano {Casas Luna} and Edgar Benjamin {Montufar Jimenez} and Carolina {Oliver Urrutia} and Maria Cristina {Pina-Barba} and Ladislav {Čelko}",
  title="Spark plasma extrusion of binder free hydroxyapatite powder",
  journal="Nanotechnology Reviews",
  year="2022",
  volume="11",
  number="1",
  pages="2295--2303",
  doi="10.1515/ntrev-2022-0131",
  issn="2191-9089",
  url="https://www.degruyter.com/document/doi/10.1515/ntrev-2022-0131/html"
}