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Deformation behavior of crystalline/amorphous Al-Si nanocomposites with nanolaminate or nanofibrous microstructures

Journal Article · · Physical Review Materials
 [1];  [2];  [2];  [3]
  1. Univ. of Michigan, Ann Arbor, MI (United States); OSTI
  2. Univ. of Nebraska, Lincoln, NE (United States)
  3. Univ. of Michigan, Ann Arbor, MI (United States)

Deformation mechanisms in sputter-deposited crystalline Al/amorphous Si nanocomposites with nanolaminate or nanofibrous morphology are characterized by nanoindentation, micropillar compression testing and transmission electron microscopy (TEM). The nanofibrous composite having crystalline Al nanofibers with ~40–50 nm in length and 15–20 nm in diameter embedded in amorphous Si exhibits strain hardening to a maximum flow stress of 2.9 GPa and no shear band (SB) formation in compression up to plastic strain exceeding 24%. On the other hand, nanolaminate composite that is composed of 80 nm crystalline Al layers and 20 nm amorphous Si layers exhibits catastrophic SBs starting at plastic strains in the range of 5–10%. Cross-sectional TEM of the deformed samples reveals a high density of stacking faults and twin boundaries in Al nanofibers and no microshear bands in the nanofibrous composite, suggesting plastic deformation in amorphous Si phase and crystalline Al nanofibers. Further, molecular dynamics simulations revealed that the plastic deformation in amorphous Si phase in the cosputtered films could be favored by the decrease in flow strength of amorphous Si with increasing Al solute concentration trapped in Si.

Research Organization:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0016808
OSTI ID:
1980353
Journal Information:
Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 9 Vol. 6; ISSN 2475-9953
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (59)

Nanolaminates Utilizing Size-Dependent Homogeneous Plasticity of Metallic Glasses journal September 2011
Suppression of Catastrophic Failure in Metallic Glass-Polyisoprene Nanolaminate Containing Nanopillars journal February 2012
Room Temperature Homogeneous Ductility of Micrometer-Sized Metallic Glass journal July 2014
“Ductile” Fracture of Metallic Glass Nanolaminates journal August 2017
Fast Parallel Algorithms for Short-Range Molecular Dynamics journal March 1995
Influence of Composition on Nanoindentation Response of Ni-Zr Alloy Thin Films journal October 2019
The relation between load and penetration in the axisymmetric boussinesq problem for a punch of arbitrary profile journal May 1965
The effect of compression and tension on shear-band structure and nanocrystallization in amorphous Al90Fe5Gd5: a high-resolution transmission electron microscopy study journal August 2003
Size dependence of mechanical properties of gold at the micron scale in the absence of strain gradients journal April 2005
Length-scale-dependent deformation mechanisms in incoherent metallic multilayered composites journal October 2005
Yield point of metallic glass journal September 2006
Effects of size on the mechanical response of metallic glasses investigated through in situ TEM bending and compression experiments journal January 2010
Compression testing of metallic glass at small length scales: Effects on deformation mode and stability journal October 2010
Compressive flow behavior of Al–TiN multilayers at nanometer scale layer thickness journal June 2011
Transition from homogeneous-like to shear-band deformation in nanolayered crystalline Cu/amorphous Cu–Zr micropillars: Intrinsic vs. extrinsic size effect journal December 2012
Mechanical behavior of nanoscale Cu/PdSi multilayers journal August 2013
Intrinsic and extrinsic size effects in the deformation of amorphous CuZr/nanocrystalline Cu nanolaminates journal November 2014
Zr alloying effect on the microstructure evolution and plastic deformation of nanostructured Cu thin films journal June 2017
Amorphous intergranular films mitigate radiation damage in nanocrystalline Cu-Zr journal March 2020
Numerical simulation of a silicon-based latent heat thermal energy storage system operating at ultra-high temperatures journal May 2019
Ultra-strong and ductile Ta/Co nanolaminates strengthened via grain-boundary expanding and interfacial sliding journal June 2021
Optimized interatomic potential for study of structure and phase transitions in Si-Au and Si-Al systems journal November 2020
Strain hardening in nanolayered thin films journal February 2014
Enhanced mechanical properties of multilayered micropillars of amorphous ZrCuTi and nanocrystalline Ta layers journal July 2011
Structural and mechanical properties of Zr1−x Mox thin films: From the nano-crystalline to the amorphous state journal December 2017
Mechanism of negative strain rate sensitivity in metallic glass film journal May 2019
Mechanical properties of crystalline Cu/Zr and crystal–amorphous Cu/Cu–Zr multilayers journal August 2012
Strain gradients in Cu–Fe thin films and multilayers during micropillar compression journal January 2016
Strain-rate dependent deformation mechanisms in single-layered Cu, Mo, and multilayer Cu/Mo thin films journal March 2022
Silicon as high-temperature phase change medium for latent heat storage: A thermo-hydraulic study journal August 2021
Substrate bias effect on Al–Si and Al–Ge thin film structure journal October 2008
Microscale deformation behavior of amorphous/nanocrystalline multilayered pillars journal October 2010
Transition from dislocation controlled plasticity to grain boundary mediated shear in nanolayered aluminum/palladium thin films journal March 2011
Effect of Zr content on structure property relations of Ni-Zr alloy thin films with mixed nanocrystalline and amorphous structure journal August 2018
Nanomechanical properties of thin films manufactured via magnetron sputtering from pure aluminum and aluminum-boron targets journal January 2020
Transition from a strong-yet-brittle to a stronger-and-ductile state by size reduction of metallic glasses journal February 2010
Tension–compression asymmetry in amorphous silicon journal May 2021
Plastic Deformation Modes of CuZr/Cu Multilayers journal March 2016
Deformation and failure mechanisms of electrochemically lithiated silicon thin films journal January 2017
First-principles calculations for understanding microstructures and mechanical properties of co-sputtered Al alloys journal January 2021
Measurement of thermal diffusivity of thin films and foils using a laser scanning microscope journal January 1995
Deformation mechanism in nanocrystalline Al: Partial dislocation slip journal July 2003
Formation mechanism of wide stacking faults in nanocrystalline Al journal May 2004
Phase-separated Al–Si thin films journal August 2005
Suppression of the shear band instability during plastic flow of nanometer-scale confined metallic glasses journal December 2007
Layer thickness dependent strain rate sensitivity of Cu/amorphous CuNb multilayer journal April 2017
Ductile crystalline-amorphous nanolaminates journal June 2007
A transmission electron microscopy study of the deformation behavior underneath nanoindents in nanoscale Al–TiN multilayered composites journal May 2010
In situ characterization of tensile behavior of laser rapid solidified Al–Si heterogeneous microstructures journal October 2021
Compressibility and structural stability of ultra-incompressible bimetallic interstitial carbides and nitrides journal April 2012
In situspectroscopic study of the plastic deformation of amorphous silicon under nonhydrostatic conditions induced by indentation journal December 2015
Evaluation of Micro-Pillar Compression Tests for Accurate Determination of Elastic-Plastic Constitutive Relations journal September 2012
Enhancing strength and ductility via crystalline-amorphous nanoarchitectures in TiZr-based alloys journal March 2022
Deformation Twinning in Nanocrystalline Aluminum journal April 2003
Transmission electron microscopy study of the deformation behavior of Cu/Nb and Cu/Ni nanoscale multilayers during nanoindentation journal March 2009
Tailoring plasticity of metallic glasses via interfaces in Cu/amorphous CuNb laminates journal July 2017
Theory of Shear Banding in Metallic Glasses and Molecular Dynamics Calculations journal January 2007
The Effect of a Taper Angle on Micro-Compression Testing of Mo-B-C Coatings journal July 2020
Ultra-Hard Nanostructured Al-Si Thin Films journal September 2005