Incidence of nanoscale heterogeneity on the nanoindentation of a semicrystalline polymer: Experiments and modeling

Bédoui, Fahmi; Sansoz, Frédéric; Murthy, N. Sanjeeva

doi:10.1016/j.actamat.2008.01.021

Cited by 20 publications

(7 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The loading/unloading sections appear to have discontinuities or small jumps in force over the recorded indentation on the PET film. The presence of force discontinuities in the loading/unloading sections on a semi-crystalline polymer was recently investigated using AFM indentation and finite element analysis (Bédoui et al, 2008). Here, these authors report that the discontinuity effect arises from variation in the yield phenomena at the lamellar level (Bédoui et al, 2008).…”

Section: Resultsmentioning

confidence: 93%

Nano-scale temperature dependent visco-elastic properties of polyethylene terephthalate (PET) using atomic force microscope (AFM)

Grant

Alfouzan

Gough

et al. 2013

Micron

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 93%

Nano-scale temperature dependent visco-elastic properties of polyethylene terephthalate (PET) using atomic force microscope (AFM)

Grant

Alfouzan

Gough

et al. 2013

Micron

View full text Add to dashboard Cite

Section: ■ Introductionmentioning

confidence: 99%

“…In particular, nanoindentation can reveal heterogeneities in the mechanical response on the nano- and microscales. Heterogeneous mechanical response can correspond with compositional and structural variation, as demonstrated in bone, − shale, , polymers, and battery electrode materials. , In some cases, heterogeneity at the nanoscale has been shown to benefit the mechanical performance of the bulk material . Furthermore, material defects that may lead to separator failure, such as surface cracks, subsurface (partially penetrating) pores, voids, and pinholes can be detected and characterized via nanoindentation. , …”

Section: Introductionmentioning

confidence: 99%

Multi-Scale Mechanical Behavior of the Li₃PS₄ Solid-Phase Electrolyte

Baranowski

Heveran

Ferguson

et al. 2016

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

The need for smaller, lighter, and longer lasting rechargeable batteries is projected to increase rapidly in the coming years because of high demand for portable electronics and electric vehicles. While traditional Li-ion batteries use liquid-phase electrolytes, these suffer from safety risks and low energy density. Solid-phase electrolytes can avoid these issues by enabling a Li metal anode, but tend to fail during cycling due to Li metal dendrite growth between the electrodes. Because Li dendrite nucleation and growth can be viewed in terms of the mechanical behavior of the battery components, it is critical to understand the mechanical response of candidate electrolyte materials. In this work, we use nanoindentation and bulk acoustic techniques to characterize the mechanical properties of β-LiPS, a promising Li-ion conducting ceramic. We find that the bulk and shear moduli of an 80% dense bulk LPS sample are 10-12 GPa and 5-6 GPa, respectively. Although this value of shear modulus may be too low to prevent Li dendrite propagation, it is likely that there are many other mechanical properties that must be taken into account to fully understand Li dendrite nucleation and growth. Ultimately, this work represents a first step in understanding the relationship between LiPS separator manufacture and its mechanical properties.

show abstract

“…The atomistic simulations presented here allow us to conclude that size effects on the mechanical properties of sub-100 nm metal nanowires may be studied experimentally using sharp indentation probes, such as depth-sensing nanoindentation 18 or atomic force microscopy-based indentation. 44…”

Section: Discussionmentioning

confidence: 99%

Molecular dynamics study of crystal plasticity during nanoindentation in Ni nanowires

Dupont

Sansoz

2009

J. Mater. Res.

Self Cite

View full text Add to dashboard Cite

Molecular dynamics simulations were performed to gain fundamental insight into crystal plasticity, and its size effects in nanowires deformed by spherical indentation. This work focused on <111>-oriented single-crystal, defect-free Ni nanowires of cylindrical shape with diameters of 12 and 30 nm. The indentation of thin films was also comparatively studied to characterize the influence of free surfaces in the emission and absorption of lattice dislocations in single-crystal Ni. All of the simulations were conducted at 300 K by using a virtual spherical indenter of 18 nm in diameter with a displacement rate of 1 mÁs À1 . No significant effect of sample size was observed on the elastic response and mean contact pressure at yield point in both thin films and nanowires. In the plastic regime, a constant hardness of 21 GPa was found in thin films for penetration depths larger than 0.8 nm, irrespective of variations in film thickness. The major finding of this work is that the hardness of the nanowires decreases as the sample diameter decreases, causing important softening effects in the smaller nanowire during indentation. The interactions of prismatic loops and dislocations, which are emitted beneath the contact tip, with free boundaries are shown to be the main factor for the size dependence of hardness in single-crystal Ni nanowires during indentation.

show abstract

Incidence of nanoscale heterogeneity on the nanoindentation of a semicrystalline polymer: Experiments and modeling

Cited by 20 publications

References 44 publications

Nano-scale temperature dependent visco-elastic properties of polyethylene terephthalate (PET) using atomic force microscope (AFM)

Nano-scale temperature dependent visco-elastic properties of polyethylene terephthalate (PET) using atomic force microscope (AFM)

Multi-Scale Mechanical Behavior of the Li₃PS₄ Solid-Phase Electrolyte

Molecular dynamics study of crystal plasticity during nanoindentation in Ni nanowires

Contact Info

Product

Resources

About

Incidence of nanoscale heterogeneity on the nanoindentation of a semicrystalline polymer: Experiments and modeling

Cited by 20 publications

References 44 publications

Nano-scale temperature dependent visco-elastic properties of polyethylene terephthalate (PET) using atomic force microscope (AFM)

Nano-scale temperature dependent visco-elastic properties of polyethylene terephthalate (PET) using atomic force microscope (AFM)

Multi-Scale Mechanical Behavior of the Li3PS4 Solid-Phase Electrolyte

Molecular dynamics study of crystal plasticity during nanoindentation in Ni nanowires

Contact Info

Product

Resources

About

Multi-Scale Mechanical Behavior of the Li₃PS₄ Solid-Phase Electrolyte