Open-cell tungsten nanofoams: Scaling behavior and structural disorder dependence of Young’s modulus and flow strength

Zhao, Mi; Schlueter, K.; Wurmshuber, Michael; Reitgruber, Maria; Kiener, Daniel

doi:10.1016/j.matdes.2020.109187

Cited by 12 publications

(9 citation statements)

References 52 publications

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“…Normalizing the strength by the density (1.73 g/cm 3 , see the Supporting Information), the specific strength is 640 MPa/(Mg/m 3 ) at 30 °C. This specific strength is significantly higher than those reported for other porous materials such as 3DOM W (52 MPa/(Mg/m 3 )), 3DOM nickel (220 MPa/(Mg/m 3 )), nanoporous tungsten (120–250 MPa/(Mg/m 3 )), and 3DOM SiO 2 /TiO 2 composites (125–460 MPa/(Mg/m 3 )) . In fact, the specific strength of 3DOM W–SiOC remains high even at high temperatures, decreasing to 460 MPa/(Mg/m 3 ) at 225 °C, 170 MPa/(Mg/m 3 ) at 425 °C, and 58 MPa/(Mg/m 3 ) by 575 °C.…”

Section: Resultsmentioning

confidence: 64%

“…CRFP: carbon-fiber-reinforced polymer. Data points: 3DOM W−SiOC (squares, from black to green: increasing temperature, this study), NP W (triangles, from black to green: increasing relative density), 62 SiO 2 /TiO 2 inverse opals (IO) (circles, from black to green: increasing TiO 2 thickness), 32 nickel IO (star), 29 3DOM W (X). 30 S12b) and 575 °C (Figure 7b), compaction (collapse) bands appear in the local strain maps, indicating that the material is behaving like a low-density solid at 425 °C and above.…”

Section: Resultsmentioning

confidence: 99%

“…Additionally, it can be compacted at higher temperatures, which could further increase the observed mechanical properties. 62…”

Section: Resultsmentioning

confidence: 99%

“…CRFP: carbon-fiber-reinforced polymer. Data points: 3DOM W–SiOC (squares, from black to green: increasing temperature, this study), NP W (triangles, from black to green: increasing relative density), SiO 2 /TiO 2 inverse opals (IO) (circles, from black to green: increasing TiO 2 thickness), nickel IO (star), 3DOM W (X) …”

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

3D Periodic and Interpenetrating Tungsten–Silicon Oxycarbide Nanocomposites Designed for Mechanical Robustness

Wang

Schmalbach

Penn

et al. 2021

ACS Appl. Mater. Interfaces

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Metal−ceramic nanocomposites exhibit exceptional mechanical properties with a combination of high strength, toughness, and hardness that are not achievable in monolithic metals or ceramics, which make them valuable for applications in fields such as the aerospace and automotive industries. In this study, interpenetrating nanocomposites of three-dimensionally ordered macroporous (3DOM) tungsten−silicon oxycarbide (W−SiOC) were prepared, and their mechanical properties were investigated. In these nanocomposites, the crystalline tungsten and amorphous silicon oxycarbide phases both form continuous and interpenetrating networks, with some discrete free carbon nanodomains. The W− SiOC material inherits the periodic structure from its 3DOM W matrix, and this periodic structure can be maintained up to 1000 °C. In situ SEM micropillar compression tests demonstrated that the 3DOM W− SiOC material could sustain a maximum average stress of 1.1 GPa, a factor of 22 greater than that of the 3DOM W matrix, resulting in a specific strength of 640 MPa/(Mg/m 3 ) at 30 °C. Deformation behavior of the developed 3DOM nanocomposite in a wide temperature range (30−575 °C) was investigated. The deformation mode of 3DOM W−SiOC exhibited a transition from fracturedominated deformation at low temperatures to plastic deformation above 425 °C.

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Section: Resultsmentioning

confidence: 64%

Section: Resultsmentioning

confidence: 99%

“…Additionally, it can be compacted at higher temperatures, which could further increase the observed mechanical properties. 62…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

3D Periodic and Interpenetrating Tungsten–Silicon Oxycarbide Nanocomposites Designed for Mechanical Robustness

Wang

Schmalbach

Penn

et al. 2021

ACS Appl. Mater. Interfaces

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“…The high performance of porous NS is due to their enhanced surfaceto-volume ratio over their nonporous counterparts. Due to their convenient mechanical properties, porous materials have fueled numerous studies to unveil their mechanical properties in almost every kind of material [31][32][33][34][35]. In this aspect, porous NS with hollow designs can present the attractive mechanical properties as observed in hollow NS, but coupled with the unique mechanical behavior of porous materials.…”

Section: Introductionmentioning

confidence: 99%

Probing the Mechanical Properties of Porous Nanoshells by Nanoindentation

et al. 2022

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In this contribution, we present a study of the mechanical properties of porous nanoshells measured with a nanoindentation technique. Porous nanoshells with hollow designs can present attractive mechanical properties, as observed in hollow nanoshells, but coupled with the unique mechanical behavior of porous materials. Porous nanoshells display mechanical properties that are dependent on shell porosity. Our results show that, under smaller porosity values, deformation is closely related to the one observed for polycrystalline and single-crystalline nanoshells involving dislocation activity. When porosity in the nanoparticle is increased, plastic deformation was mediated by grain boundary sliding instead of dislocation activity. Additionally, porosity suppresses dislocation activity and decreases nanoparticle strength, but allows for significant strain hardening under strains as high as 0.4. On the other hand, Young’s modulus decreases with the increase in nanoshell porosity, in agreement with the established theories of porous materials. However, we found no quantitative agreement between conventional models applied to obtain the Young’s modulus of porous materials.

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In-Situ Precipitated Needle Like Nanocrystalline β-Ti Reinforced Porous Titanium Alloy via Molten Salt Electrolysis

Wang

Zhao

et al. 2023

Met. Mater. Int.

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Open-cell tungsten nanofoams: Scaling behavior and structural disorder dependence of Young’s modulus and flow strength

Cited by 12 publications

References 52 publications

3D Periodic and Interpenetrating Tungsten–Silicon Oxycarbide Nanocomposites Designed for Mechanical Robustness

3D Periodic and Interpenetrating Tungsten–Silicon Oxycarbide Nanocomposites Designed for Mechanical Robustness

Probing the Mechanical Properties of Porous Nanoshells by Nanoindentation

In-Situ Precipitated Needle Like Nanocrystalline β-Ti Reinforced Porous Titanium Alloy via Molten Salt Electrolysis

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