Title :

On the study of tailorable interface structure in a diamond/Al12Si composite processed by selective laser melting

Author(s) :

Ma, Yu [Auteur]
Institut de Chimie Moléculaire et des Matériaux d'Orsay [ICMMO]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Ji, Gang [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Li, X.P. [Auteur]
Chen, C.Y. [Auteur]
Tan, Z.Q. [Auteur]
Addad, Ahmed [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Li, Z.Q. [Auteur]
Sercombe, T.B. [Auteur]
Kruth, J.P. [Auteur]

Journal title :

Materialia

Abbreviated title :

Materialia

Pages :

100242

Publisher :

Elsevier BV

Publication date :

2019-03

ISSN :

2589-1529

HAL domain(s) :

Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Chimie/Matériaux

English abstract : [en]

Aluminum-diamond composites were produced using selective laser melting (SLM) from mechanically mixed diamond and Al12Si powders for use in thermal management applications. The feasibility of SLM for both interface tailoring ...
Show more >Aluminum-diamond composites were produced using selective laser melting (SLM) from mechanically mixed diamond and Al12Si powders for use in thermal management applications. The feasibility of SLM for both interface tailoring and simultaneously densification, which are the key for determining the overall thermal conductivity (TC) of the composites, has been investigated. The results indicate that the interface structure of the as-built composites can be controlled, despite the complex physical and chemical nature of SLM. A ‘clean’ diffusion-bonded interface revealed at the micron scale, which is desirable for enhancing TC, was obtained at a laser energy density of 95.2 J/mm3. This demonstrates a possible new potential of SLM in creating metal matrix composites for functional applications. However, despite manipulation of the processing parameters, it was not possible to achieve a relative density above 90%. Thus, how to realize near full density, while maintaining such a ‘clean’ interface during SLM remains a key technical problem for the future. The complex metallurgical mechanisms responsible for interface evolution and microstructure formation are discussed in detail with the aid of finite element analysis, and further densification strategies are proposed.Show less >

Language :

Anglais

Audience :

Non spécifiée

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Métallurgie Physique et Génie des Matériaux

Submission date :

2019-05-29T15:28:43Z
2019-05-29T18:42:32Z
2019-10-24T15:30:04Z