Microstructural, Surface Topology and Nanomechanical Characterization of Electrodeposited Ni-P/SiC Nanocomposite Coatings

Abstract

In the present study, nickel phosphorous alloys (Ni-P) and Ni-P/ silicon carbide (SiC) nanocomposite coatings were deposited by electrodeposition on steel substrates in order for their microstructural properties to be assessed while using SEM, XRD, and three-dimensional (3D) profilometry as well as nanoindentation. The amorphisation of the as-plated coatings was observed in all cases, whereas subsequent heat treatment induced crystallization and Ni3P intermetallic phase precipitation. Examination of the surface topology revealed that the surface roughness follows the deposition characteristics and heat treatment induced microstructural changes. Additionally, substantial improvements in mechanical properties, including hardness, yield stress, and elasticity modulus, were obtained for the Ni-P, Ni-P/SiC nanocomposites when heat treated as seen from the nanoindentation results. A Finite Element Analysis (FEA) was developed to simulate the nanoindentation tests that enable the precise extraction of the Ni-P and Ni-P/SiC nanocomposite coatings’ stress-strain behavior. It is shown that the correlation between the nanoindentation tests and the computational models was satisfactory, while the stress-strain curves revealed higher yield points for the heat-treated samples.

Influence of Reactive Chain Extension on the Properties of 3D Printed Poly(Lactic Acid) Constructs

“…The values of hardness and elastic modulus of neat PLA and PLA/J filaments were determined based on previous work [ 50 , 51 , 52 , 53 , 54 , 55 ]. Figure 6 a,b show the average values of hardness and elastic modulus depending on Joncryl concentration obtained from nanoindentation testing of PLA/Joncryl filaments.…”

“…The range of nanoindentation depth was 2.73 to 2.88 μm for neat PLA, 2.72 to 2.81 μm for PLA/J1 samples, 2.60 to 2.65 μm for PLA/J2 samples, and 2.83 to 2.87 μm for PLA/J3 samples. The values of hardness and elastic modulus of neat PLA and PLA/J filaments were determined based on previous work [50][51][52][53][54][55]. Figure 6a,b show the average values of hard- The values of hardness and elastic modulus of neat PLA and PLA/J filaments were determined based on previous work [50][51][52][53][54][55].…”

Effect of ball milling on the mechanical properties and crystallization of graphene nanoplatelets reinforced short chain branched‐polyethylene

“…The nanoindentation experiments have been computationally generated considering the simulation of the loading stage of the indenter penetrating into the SCB‐PE specimens. Other work 53,54 has shown that kinematic hardening leads to a rapid convergence in the corresponding FEA calculations, so this method was utilized in the developed curve fitting procedure.…”

Anodic synthesis of TiO2 nanotubes by step-up voltages

“…where, P max is the maximum load applied to the material, h max maximum depth penetration, and (A) is measured as the maximum measured contact between the indenter and specimen. For Berkovich indenter, A surface contact is expressed as a function of connection between specimen and indentation depth hf as shown in equation ( 2) [45][46][47] A ¼ 3 Then h f contact with the material can be expressed using equation (3) as…”