Titre :

In‑depth investigation of the evolution of microstructure and its influence on the mechanical properties of medium‑phosphorus electroless nickel coatings after thermomechanical treatments

Auteur(s) :

Le Tran, Hoang Long [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Bonvalet Rolland, Manon [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Proriol Serre, Ingrid [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Roussel, Pascal [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Balloy, David [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207

Titre de la revue :

Journal of Materials Science

Date de publication :

2024

ISSN :

0022-2461

Discipline(s) HAL :

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

Résumé en anglais : [en]

To understand and further improve the corrosion resistance of a medium electroless phosphorus nickel coating (9 wt% P) under high-temperature and corrosive conditions, the microstructural evolution of the coating after ...
Lire la suite >To understand and further improve the corrosion resistance of a medium electroless phosphorus nickel coating (9 wt% P) under high-temperature and corrosive conditions, the microstructural evolution of the coating after various treatments, including thermal and mechanical methods (such as Hammer Peening), was extensively studied. Complementary analytical techniques, including SEM, EDS, in situ and ex situ XRD, and micro-indentation, were employed for detailed analysis. The transformation of the deposit from its amorphous state to a distinct structure comprising Ni, Ni3P, and NiO due to thermal treatment (ranging from 20 to 800 °C) was examined. The evolution of microstructure with temperature and annealing duration was discussed, correlating with alterations in mechanical properties, particularly micro-hardness. At temperatures exceeding 310 °C, a phase transition occurred, characterized by co-precipitation of Ni and Ni3P, leading to a significant change in the coating’s mechanical behavior. With further temperature elevation, nickel diffused toward the surface, initiating NiO formation at 500 °C. The coating’s oxidation behavior during isothermal treatment at varied temperatures (up to 800 °C) was also explored. This investigation was supported by thermodynamic calculations. Additionally, simplified kinetic simulations with the Dictra module from Thermo-Calc were proven to be able to reproduce the oxidation behavior. Hammer peening treatment enhanced the coating’s hardness in its as-deposited state by introducing residual stresses that affected the precipitation kinetics during subsequent heat treatment. However, this hardening effect was no longer evident after the thermal treatment.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS
INRAE
ENSCL

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
• Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Métallurgie Physique et Génie des Matériaux

Date de dépôt :

2024-11-06T20:16:12Z
2024-11-08T09:24:47Z