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In Situ Synthesis of Al-Based MMCs Reinforced with AlN by Mechanical Alloying under NH3 Gas

 

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Opened Access In Situ Synthesis of Al-Based MMCs Reinforced with AlN by Mechanical Alloying under NH3 Gas
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Author: Sánchez Caballero, Eduardo
Cuevas, F. G.
Ternero Fernández, Fátima
Astacio López, Raquel
Montes Martos, Juan Manuel
Cintas Físico, Jesús
Department: Universidad de Sevilla. Departamento de Ingeniería y Ciencia de los Materiales y del Transporte
Date: 2018
Published in: Materials, 11 (823), 1-9.
Document type: Article
Abstract: Aluminum matrix composites (AMCs) reinforced by aluminum nitride were prepared by mechanical alloying followed by a simple press and sintering method. Milling began under vacuum and after a period of between 1 and 4 h, NH3 gas flow (1 cm3/s) was incorporated until the total milling time of 5 h was reached. Results show that in addition to the strain hardening taking place during mechanical alloying, NH3 plays an additional role in powder hardening. Thereby, the properties of the sintered compacts are strongly influenced by the amount of N incorporated into the powders during milling and the subsequent formation of AlN during the consolidation process. The obtained AMC reaches tensile strengths as high as 459 MPa and hardness much higher than that of the as-received aluminum compact.
Cite: Sánchez Caballero, E., Cuevas, F.G., Ternero Fernández, F., Astacio López, R., Montes Martos, J.M. y Cintas Físico, J. (2018). In Situ Synthesis of Al-Based MMCs Reinforced with AlN by Mechanical Alloying under NH3 Gas. Materials, 11 (823), 1-9.
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URI: https://hdl.handle.net/11441/77504

DOI: 10.3390/ma11050823

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