Shock-wave studies of anomalous compressibility of glassy carbon

Молодец, А. М.; Голышев, А. А.; Савиных, А. С.; Kim, V. V.

doi:10.1134/s1063776116020102

Cited by 7 publications

(3 citation statements)

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“…A larger upper bound in feature sizes is further substantiated by literature in the field of carbon production, where non‐porous glassy carbon is reported to have an upper transport distance of 4.5 mm prior to carbonization. [ 14,37 ] Here, we deal with a 0.5 mm transport distance, which is far from the reported limitation.…”

Section: Resultsmentioning

confidence: 99%

“…The fracture surface seems unlike the one reported for glassy carbon, which usually has distinct striations or is completely smooth. [ 37 ] Figure 7e shows a closer view of the grainy region which could be due to a porosity at the 100 nm scale. This is far from the porosity reported by Rezaei et al.…”

Section: Resultsmentioning

confidence: 99%

“…Interestingly, the fracture zones close to the surfaces, Figure 7c, in contrast, seem similar to those reported for glassy carbon, which may be indicative that bulk material deviates from the one close to the surface. [ 37 ]…”

Section: Resultsmentioning

confidence: 99%

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Overcoming the Transport Limitations of Photopolymer‐Derived Architected Carbon

Baglo

Sauermoser

Lid

et al. 2023

Adv Materials Technologies

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Photopolymer derived carbon grows in popularity, yet the range in available feature sizes is limited. Here the focus is on expanding the field to low surface to volume ratio (SVR) structures. A high temperature acrylic photopolymerizable precursor with FTIR and DSC is described and a thermal inert‐gas treatment is developed for producing architected carbon in the mm scale with SVR of 1.38×10−3 µm−1. Based on thermogravimetric analysis and mass spectrometry, two thermal regimes with activation energies of ≈79 and 169 kJ mol−1 are distiguished, which is reasoned with mechanisms during the polymer's morphologic conversion between 300 and 500 °C. The temperature range of the major dimensional shrinkage (300–440 °C, 50%) does not match the range of the largest alteration in elemental composition (440–600 °C, O/C 0.25–0.087%). The insights lead to an optimized thermal treatment with an initial ramp (2 °C min−1 to 350 °C), isothermal hold (14 h), post hold ramp (0.5 °C min−1 to 440 °C) and final ramp (10 °C min−1 to 1000 °C). The resulting carbon structures are dimensionally stable, non‐porous at the µm scale, and comprise an unprecedented variation in feature sizes (from mm to µm scale). The findings shall advance architected carbon to industrially relevant scales.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%