Publication detail

Evaluating the suitability of fast sintering techniques for the consolidation of calcium phosphate scaffolds produced by DLP

PAREDES SÁNCHEZ, C. ROLEČEK, J. PEJCHALOVÁ, L. SPUSTA, T. SALAMON, D. MIRANDA, P.

Original Title

Evaluating the suitability of fast sintering techniques for the consolidation of calcium phosphate scaffolds produced by DLP

Type

journal article in Web of Science

Language

English

Original Abstract

Porous scaffolds were fabricated via Digital Light Processing (DLP) from beta-TCP powder and sintered by conventional sintering in air (CSA), rapid sintering in air (RSA) and pressure-less spark plasma sintering in vacuum (pl-SPS), at four different temperatures: 1200, 1300, 1400 and 1500 degrees C. Each sintering strategy resulted in scaffolds with different phase composition, microstructure and mechanical properties. Long dwell times or high temperatures were required to achieve a complete beta ->alpha transformation, and rapid cooling rates avoided the reverse transformation. The presence of graphite in the sintering chamber played a crucial role in stabilising the alpha-TCP phase, phase prevailing in SPS-treated scaffolds, hindered their densification and avoided the generation of transformation-induced cracks. All scaffolds exhibited compressive strengths within the range of cancellous bone, with the highest average value of 22 +/- 4 MPa achieved by the RSA scaffolds sintered at 1300 degrees C, thanks to their greater densification and fine microstructure.

Keywords

Scaffolds; Calcium phosphate; Mechanical properties; Digital Light Processing; Spark Plasma Sintering

Authors

PAREDES SÁNCHEZ, C.; ROLEČEK, J.; PEJCHALOVÁ, L.; SPUSTA, T.; SALAMON, D.; MIRANDA, P.

Released

1. 11. 2023

Publisher

ELSEVIER SCI LTD

Location

OXFORD

ISBN

1873-619X

Periodical

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY

Year of study

43

Number

14

State

United Kingdom of Great Britain and Northern Ireland

Pages from

6493

Pages to

6503

Pages count

11

URL

https://www.sciencedirect.com/science/article/pii/S0955221923004272?via%3Dihub

Full text in the Digital Library

http://hdl.handle.net/11012/245109

BibTex

@article{BUT185512,
  author="Claudia Isabel {Paredes Sánchez} and Jakub {Roleček} and Lucie {Pejchalová} and Tomáš {Spusta} and David {Salamon} and Pedro {Miranda}",
  title="Evaluating the suitability of fast sintering techniques for the consolidation of calcium phosphate scaffolds produced by DLP",
  journal="JOURNAL OF THE EUROPEAN CERAMIC SOCIETY",
  year="2023",
  volume="43",
  number="14",
  pages="6493--6503",
  doi="10.1016/j.jeurceramsoc.2023.05.052",
  issn="1873-619X",
  url="https://www.sciencedirect.com/science/article/pii/S0955221923004272?via%3Dihub"
}