Laser sintering of cold-pressed Cu powder without binder use

Loic Constantin, Lisha Fan, Bruno Mortaigne, Kamran Keramatnejad, Qiming Zou, Clio Azina, Yongfeng Lu, Jean François Silvain

Research output: Contribution to journalArticle

Abstract

In this work, laser sintering (LS) of cold-pressed copper (Cu) powder without using a binder was demonstrated. To promote the densification of the final part, the Cu powder was cold pressed beforehand, thereby forming a densely packed powder bed for the LS. The densification and microstructural evolution study show that the cold-pressed powder led to an increase of up to 11% in the relative density and a decrease of 10 times in the surface roughness. The influence of the scan speed on the densification and sintering quality was studied. A relatively slow scan speed, 25 µm/s, allowed sufficient atomic diffusion during the LS process and ultimately produced dense Cu parts without cracks and open pores. The introduction of the cold-pressing step into the LS process is critical for achieving high-density powder metallurgy parts without using binders.

Original languageEnglish (US)
Pages (from-to)178-181
Number of pages4
JournalMaterialia
Volume3
DOIs
StatePublished - Nov 1 2018

Fingerprint

Powders
Binders
Sintering
Densification
Lasers
Microstructural evolution
Powder metallurgy
Copper
Surface roughness
Cracks

Keywords

  • Cold pressing
  • Copper powder
  • Densification
  • Laser sintering (LS)

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Constantin, L., Fan, L., Mortaigne, B., Keramatnejad, K., Zou, Q., Azina, C., ... Silvain, J. F. (2018). Laser sintering of cold-pressed Cu powder without binder use. Materialia, 3, 178-181. https://doi.org/10.1016/j.mtla.2018.08.021

Laser sintering of cold-pressed Cu powder without binder use. / Constantin, Loic; Fan, Lisha; Mortaigne, Bruno; Keramatnejad, Kamran; Zou, Qiming; Azina, Clio; Lu, Yongfeng; Silvain, Jean François.

In: Materialia, Vol. 3, 01.11.2018, p. 178-181.

Research output: Contribution to journalArticle

Constantin, L, Fan, L, Mortaigne, B, Keramatnejad, K, Zou, Q, Azina, C, Lu, Y & Silvain, JF 2018, 'Laser sintering of cold-pressed Cu powder without binder use', Materialia, vol. 3, pp. 178-181. https://doi.org/10.1016/j.mtla.2018.08.021
Constantin L, Fan L, Mortaigne B, Keramatnejad K, Zou Q, Azina C et al. Laser sintering of cold-pressed Cu powder without binder use. Materialia. 2018 Nov 1;3:178-181. https://doi.org/10.1016/j.mtla.2018.08.021
Constantin, Loic ; Fan, Lisha ; Mortaigne, Bruno ; Keramatnejad, Kamran ; Zou, Qiming ; Azina, Clio ; Lu, Yongfeng ; Silvain, Jean François. / Laser sintering of cold-pressed Cu powder without binder use. In: Materialia. 2018 ; Vol. 3. pp. 178-181.
@article{56a190409ae64402b5a29460c316f486,
title = "Laser sintering of cold-pressed Cu powder without binder use",
abstract = "In this work, laser sintering (LS) of cold-pressed copper (Cu) powder without using a binder was demonstrated. To promote the densification of the final part, the Cu powder was cold pressed beforehand, thereby forming a densely packed powder bed for the LS. The densification and microstructural evolution study show that the cold-pressed powder led to an increase of up to 11{\%} in the relative density and a decrease of 10 times in the surface roughness. The influence of the scan speed on the densification and sintering quality was studied. A relatively slow scan speed, 25 µm/s, allowed sufficient atomic diffusion during the LS process and ultimately produced dense Cu parts without cracks and open pores. The introduction of the cold-pressing step into the LS process is critical for achieving high-density powder metallurgy parts without using binders.",
keywords = "Cold pressing, Copper powder, Densification, Laser sintering (LS)",
author = "Loic Constantin and Lisha Fan and Bruno Mortaigne and Kamran Keramatnejad and Qiming Zou and Clio Azina and Yongfeng Lu and Silvain, {Jean Fran{\cc}ois}",
year = "2018",
month = "11",
day = "1",
doi = "10.1016/j.mtla.2018.08.021",
language = "English (US)",
volume = "3",
pages = "178--181",
journal = "Materialia",
issn = "2589-1529",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Laser sintering of cold-pressed Cu powder without binder use

AU - Constantin, Loic

AU - Fan, Lisha

AU - Mortaigne, Bruno

AU - Keramatnejad, Kamran

AU - Zou, Qiming

AU - Azina, Clio

AU - Lu, Yongfeng

AU - Silvain, Jean François

PY - 2018/11/1

Y1 - 2018/11/1

N2 - In this work, laser sintering (LS) of cold-pressed copper (Cu) powder without using a binder was demonstrated. To promote the densification of the final part, the Cu powder was cold pressed beforehand, thereby forming a densely packed powder bed for the LS. The densification and microstructural evolution study show that the cold-pressed powder led to an increase of up to 11% in the relative density and a decrease of 10 times in the surface roughness. The influence of the scan speed on the densification and sintering quality was studied. A relatively slow scan speed, 25 µm/s, allowed sufficient atomic diffusion during the LS process and ultimately produced dense Cu parts without cracks and open pores. The introduction of the cold-pressing step into the LS process is critical for achieving high-density powder metallurgy parts without using binders.

AB - In this work, laser sintering (LS) of cold-pressed copper (Cu) powder without using a binder was demonstrated. To promote the densification of the final part, the Cu powder was cold pressed beforehand, thereby forming a densely packed powder bed for the LS. The densification and microstructural evolution study show that the cold-pressed powder led to an increase of up to 11% in the relative density and a decrease of 10 times in the surface roughness. The influence of the scan speed on the densification and sintering quality was studied. A relatively slow scan speed, 25 µm/s, allowed sufficient atomic diffusion during the LS process and ultimately produced dense Cu parts without cracks and open pores. The introduction of the cold-pressing step into the LS process is critical for achieving high-density powder metallurgy parts without using binders.

KW - Cold pressing

KW - Copper powder

KW - Densification

KW - Laser sintering (LS)

UR - http://www.scopus.com/inward/record.url?scp=85061036888&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85061036888&partnerID=8YFLogxK

U2 - 10.1016/j.mtla.2018.08.021

DO - 10.1016/j.mtla.2018.08.021

M3 - Article

VL - 3

SP - 178

EP - 181

JO - Materialia

JF - Materialia

SN - 2589-1529

ER -