From Ni–P Metastable Alloy Nanoparticles to Bulk Submicrometer Grain-Sized MMCs with Tunable Mechanical and Magnetic Properties - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Metals Année : 2020

From Ni–P Metastable Alloy Nanoparticles to Bulk Submicrometer Grain-Sized MMCs with Tunable Mechanical and Magnetic Properties

Résumé

In this study, submicrometer grain-sized metal matrix composites (MMCs) based on nickel were elaborated via a bottom-up strategy combining the polyol process and a non-conventional heat treatment route. First, four sets of nano-sized NiP metastable alloy nanopowders with an average particle size centered at 50, 100, 130, and 220 nm were prepared by the polyol process modified by the addition of hypophosphite (strong reducing agent) and heterogeneous nucleation using silver nitrate and platinum salt (nucleating agents). The heat treatment step was realized by reactive spark plasma sintering (R-SPS) at identical heat treatment conditions (600 • C, 53 MPa, and 10 min as holding time). R-SPS transformed the NiP metastable alloys into bulk submicrometer grain-sized MMCs with Ni as the matrix and Ni 3 P as the reinforcement. Mechanical and magnetic properties of the four MMC samples were found to be closely related to the grain size of the Ni matrix, which varied from 247 to 638 nm. Yield stress, maximum stress, and coercive field increased when the grain size decreased, while plastic strain and magnetization saturation decreased. The reinforcement Ni 3 P phase enhanced the mechanical characteristics of the composite. Crossover behavior was observed at around 350 nm Ni grain size, where a ductile and soft magnetic composite was tuned into a hard mechanical and semi-hard magnetic one.
Fichier principal
Vignette du fichier
metals-10-00112.pdf (3.68 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-04188672 , version 1 (26-08-2023)

Identifiants

Citer

Mohamed Ali Bousnina, Frédéric Schoenstein, Silvana Mercone, Noureddine Jouini. From Ni–P Metastable Alloy Nanoparticles to Bulk Submicrometer Grain-Sized MMCs with Tunable Mechanical and Magnetic Properties. Metals, 2020, 10 (1), pp.112. ⟨10.3390/met10010112⟩. ⟨hal-04188672⟩
6 Consultations
27 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More