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Influence of carbon nanoparticle addition (and impurities) on selective laser melting of pure copper

Influence of carbon nanoparticle addition (and impurities) on selective laser melting of pure copper
Influence of carbon nanoparticle addition (and impurities) on selective laser melting of pure copper
The addition of 0.1 wt % carbon nanoparticles significantly improved the optical absorption and flowability of gas-atomized copper powder. This facilitated selective laser melting (SLM) by reducing the required laser energy density to obtain 98% dense parts. Moreover, the carbon addition led to an in situ de-oxidation of the copper parts during the SLM process. The properties of the as-built copper parts were limited to a tensile strength of 125 MPa, a ductility of 3%, and an electrical conductivity of 22.7 × 106 S/m, despite the advantageous effect of carbon on the powder characteristics and SLM behavior. The modest mechanical properties were associated with the segregation of carbon nanoparticles and other impurities, such as phosphorus and oxygen along grain boundaries of epitaxially grown grains. Whereas, the low electrical conductivity was mainly attributed to the phosphorus impurity in solid-solution with copper.
selective laser melting, copper, carbon-mixed-copper, laser reflection, laser absorption
Jadhav, Suraj Dinkar
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Dadbakhsh, Sasan
ca4ee743-78d6-4a8a-83da-2b406667c290
Vleugels, Jozef
3eafcc8d-ae5b-41d4-953a-20174acf372c
Hofkens, Johan
f17ac1c6-06b6-4948-b52c-300d2a866137
Van Puyvelde, Peter
6cd5b07e-88b3-4093-814d-f559f7d8d3b4
Yang, Shoufeng
e0018adf-8123-4a54-b8dd-306c10ca48f1
Kruth, Jean-Pierre
da276ce2-fd88-4b4b-9ffa-d19c53f68ead
Van Humbeeck, Jan
fc9c31da-4b2d-411e-9254-986adf81188c
Vanmeensel, Kim
275e05a1-05ad-4ab7-b654-f08f8d7dbc07
Jadhav, Suraj Dinkar
9f348ba6-bd2a-4d41-9e03-a74d72f9e580
Dadbakhsh, Sasan
ca4ee743-78d6-4a8a-83da-2b406667c290
Vleugels, Jozef
3eafcc8d-ae5b-41d4-953a-20174acf372c
Hofkens, Johan
f17ac1c6-06b6-4948-b52c-300d2a866137
Van Puyvelde, Peter
6cd5b07e-88b3-4093-814d-f559f7d8d3b4
Yang, Shoufeng
e0018adf-8123-4a54-b8dd-306c10ca48f1
Kruth, Jean-Pierre
da276ce2-fd88-4b4b-9ffa-d19c53f68ead
Van Humbeeck, Jan
fc9c31da-4b2d-411e-9254-986adf81188c
Vanmeensel, Kim
275e05a1-05ad-4ab7-b654-f08f8d7dbc07

Jadhav, Suraj Dinkar, Dadbakhsh, Sasan, Vleugels, Jozef, Hofkens, Johan, Van Puyvelde, Peter, Yang, Shoufeng, Kruth, Jean-Pierre, Van Humbeeck, Jan and Vanmeensel, Kim (2019) Influence of carbon nanoparticle addition (and impurities) on selective laser melting of pure copper. Materials, 12 (15), [2469]. (doi:10.3390/ma12152469).

Record type: Article

Abstract

The addition of 0.1 wt % carbon nanoparticles significantly improved the optical absorption and flowability of gas-atomized copper powder. This facilitated selective laser melting (SLM) by reducing the required laser energy density to obtain 98% dense parts. Moreover, the carbon addition led to an in situ de-oxidation of the copper parts during the SLM process. The properties of the as-built copper parts were limited to a tensile strength of 125 MPa, a ductility of 3%, and an electrical conductivity of 22.7 × 106 S/m, despite the advantageous effect of carbon on the powder characteristics and SLM behavior. The modest mechanical properties were associated with the segregation of carbon nanoparticles and other impurities, such as phosphorus and oxygen along grain boundaries of epitaxially grown grains. Whereas, the low electrical conductivity was mainly attributed to the phosphorus impurity in solid-solution with copper.

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materials-12-02469-v2 - Version of Record
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More information

Accepted/In Press date: 2 August 2019
e-pub ahead of print date: 2 August 2019
Keywords: selective laser melting, copper, carbon-mixed-copper, laser reflection, laser absorption

Identifiers

Local EPrints ID: 436339
URI: http://eprints.soton.ac.uk/id/eprint/436339
PURE UUID: 542f67b6-9864-4ad8-be8f-a34d07061ecf
ORCID for Shoufeng Yang: ORCID iD orcid.org/0000-0002-3888-3211

Catalogue record

Date deposited: 06 Dec 2019 17:30
Last modified: 25 Nov 2021 22:57

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Contributors

Author: Suraj Dinkar Jadhav
Author: Sasan Dadbakhsh
Author: Jozef Vleugels
Author: Johan Hofkens
Author: Peter Van Puyvelde
Author: Shoufeng Yang ORCID iD
Author: Jean-Pierre Kruth
Author: Jan Van Humbeeck
Author: Kim Vanmeensel

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