Publication detail

Pressure-less spark plasma sintering of 3D-plotted titanium porous structures

KASHIMBETOVA, A. SLÁMEČKA, K. DÍAZ DE LA TORRE, S. HERNÁNDEZ-MORALES, B. MENDEZ-GARCIA, J. PINA-BARBA, M. HUI, D. ČELKO, L. MONTUFAR JIMENEZ, E.

Original Title

Pressure-less spark plasma sintering of 3D-plotted titanium porous structures

Type

journal article in Web of Science

Language

English

Original Abstract

Additive manufacturing of titanium porous structures by direct ink writing involves the removal of the binder needed for powder extrusion and subsequent sintering to consolidate the 3D-plotted body. In this work, pressure-less spark plasma sintering (PL-SPS) was systematically studied for fast consolidation of titanium porous structures. Furthermore, poloxamer 407 was used as the binder and the lowest temperature possible was identified for its thermal elimination. The results show for the first time that PL-SPS generated sintering conditions similar to those generated by conventional pressure-less sintering, producing hierarchical titanium porous structures with equivalent densification, shrinkage, and surface roughness, but with minimal grain growth. The thermal responses of the die and material showed efficient radiation heat transfer, allowing fast heating (100 °C/min) of one sample per run, promoting the formation of sintering necks and powder densification in 10 min, which is much faster than conventional sintering that requires at least 2 h of dwell time. However, the process operates at a sintering temperature 200-300 °C above the conventional sintering temperature, and at the expense of high consumption of electrical energy to achieve such a high heating rate. The mechanical strength of the resulting titanium structures increases with increasing strand densification at nearly constant strand separation, resulting in strong and plastic porous structures.

Keywords

Direct ink writing; Metal porous structure; Robocasting; Scaffold; Spark plasma sintering; Titanium

Authors

KASHIMBETOVA, A.; SLÁMEČKA, K.; DÍAZ DE LA TORRE, S.; HERNÁNDEZ-MORALES, B.; MENDEZ-GARCIA, J.; PINA-BARBA, M.; HUI, D.; ČELKO, L.; MONTUFAR JIMENEZ, E.

Released

14. 12. 2022

Publisher

Elsevier

Location

Brazilská federativní republika

ISBN

2238-7854

Periodical

Journal of Materials Research and Technology

Year of study

22

Number

1

State

Federative Republic of Brazil

Pages from

2147

Pages to

2157

Pages count

11

URL

https://www.sciencedirect.com/science/article/pii/S2238785422019627

Full text in the Digital Library

http://hdl.handle.net/11012/209267

BibTex

@article{BUT183243,
  author="Adelia {Kashimbetova} and Karel {Slámečka} and Sebastian {Díaz de la Torre} and Bernardo {Hernández-Morales} and Jose C. {Mendez-Garcia} and Maria Cristina {Pina-Barba} and David {Hui} and Ladislav {Čelko} and Edgar Benjamin {Montufar Jimenez}",
  title="Pressure-less spark plasma sintering of 3D-plotted titanium porous structures",
  journal="Journal of Materials Research and Technology",
  year="2022",
  volume="22",
  number="1",
  pages="2147--2157",
  doi="10.1016/j.jmrt.2022.12.072",
  issn="2238-7854",
  url="https://www.sciencedirect.com/science/article/pii/S2238785422019627"
}