Polymer-derived ceramic molten metal filters

Semerci, Tugce; Dizdar, Kerem Can; Kulkarni, Apoorv; Dışpınar, Derya; Sorarù, Gian Domenico; Vakifahmetoğlu, Çekdar

doi:10.1007/s10853-022-07542-9

Cited by 4 publications

(4 citation statements)

References 46 publications

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“…Initially, PU foams were cut into desired sizes (diameter of ∼35 mm and thickness of ∼5 mm), and solid PMS resin powder was dissolved in acetone while stirring at 500 rpm at room temperature (RT) for 10 min. The resulting solutions were then transferred into separate glass Petri dishes, and foams were impregnated with a solution following a previously published procedure 5,33 . After the drying step of 1 h, the curing procedure was carried out at 200°C for 6 h. Finally, all the cured foams were pyrolyzed under Argon (Ar) flow (200 mL/min) at two different temperatures (400 and 1000°C) in an alumina tube furnace PROTERM PTF 16/75/450, Ankara, Turkey) with a heating rate of 2°C.min −1 for 2 h (dwell time).…”

Section: Methodsmentioning

confidence: 99%

“…The resulting solutions were then transferred into separate glass Petri dishes, and foams were impregnated with a solution following a previously published procedure. 5,33 After the drying step of 1 h, the curing procedure was carried out at 200 • C for 6 h. Finally, all the cured foams were pyrolyzed under Argon (Ar) flow (200 mL/min) at two different temperatures (400 and 1000…”

Section: Foamsmentioning

confidence: 99%

“…Conventionally, foams have randomly distributed pores (open‐cells have three‐dimensional [3D]‐interconnected pores allowing fluid permeability), defined with pores per inch (PPI) and relative density generally below 0.3, that is, total porosity > 70 vol% 4 . The replica method is one of the most straightforward approaches for foam processing, particularly in producing PDC foams, due to the simplicity of controlling the processing conditions 5 …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

SiOC foam‐aerogel composites: Optimal balance of lightness and excellent thermal insulation

Icin,

Abebe,

Soraru

et al. 2024

J Am Ceram Soc.

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Foam‐aerogel composites are synthesized in polymeric, hybrid, and ceramic states by completing the open cells of the foam with a solution forming a wet gel, carbon dioxide (CO2) supercritically dried, and pyrolyzed. Thermal diffusivity measurements are conducted using the laser flash, and for mechanical performance, cold crushing tests are done to obtain compressive strengths. Samples possess a range of specific surface area (SSA) values up to ∼650 m2/g contingent upon the material state, that is, polymeric, hybrid, or ceramic. While SSA values can be deliberately altered, almost all samples demonstrated a total porosity of ∼90 vol%, with superb specific compressive strength reaching around 2 MPa. In addition to adjustable surface characteristics granting hydrophobic and hydrophilic features, the study revealed the potential use of these foam‐aerogel composites as thermal insulators with low thermal conductivities of 0.02 W·m−1·K−1 at RT and 0.05 W·m−1·K−1 at 500°C. When exposed directly to a butane flame gun with a flame temperature reaching ∼1200°C, from the backside of a 5 mm‐thick foam‐aerogel composite, only ∼200°C is recorded, which is lower than a comparable commercial insulator panel tested under the same conditions.

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Section: Methodsmentioning

confidence: 99%

Section: Foamsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

SiOC foam‐aerogel composites: Optimal balance of lightness and excellent thermal insulation

Icin,

Abebe,

Soraru

et al. 2024

J Am Ceram Soc.

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“…7 The emergence of polymer-derived ceramics (PDCs) technique has greatly promoted the development of advanced ceramics and related materials. By combining with the PDCs method, various strategies have been developed for the fabrication of porous ceramic foams, including replica, 6,[8][9][10][11][12] sacrificial template, [13][14][15] and direct foaming 6,[16][17][18][19][20] techniques. These approaches have been widely used in the preparation of SiOC ceramic foams, 17,18,[21][22][23] and several works have also reported the application of solid or liquid polycarbosilanes as preceramic polymers and binders in slurries to produce SiC foams by combining with replica, 11,12 direct foaming, 6 or other forming methods.…”

Section: Introductionmentioning

confidence: 99%

A synergetic poring strategy to prepare high porosity SiC ceramic foam with good mechanical strength

Jing,

Guo,

Luo

et al. 2023

Int J Applied Ceramic Tech

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Microstructure‐tailored high porosity silicon carbide (SiC) ceramic foams were successfully fabricated using polymeric precursor slurry through a synergetic pore‐forming strategy that combines direct foaming and sacrificial template method together. The slurry is composed of a vinyl‐containing liquid polycarbosilane, poly(methyl methacrylate) (PMMA) microspheres, and composite inorganic fillers. The expandable PMMA served a dual role as both foaming agent and sacrificial template, while the liquid polycarbosilane was used as both binder and preceramic polymer. The green bodies foamed from precursor slurry were pyrolyzed at 1150, 1400, and 1600°C, respectively, to produce corresponding SiC ceramic foams. The pyrolysis behavior of the green body foams and the crystallization behavior of the SiC ceramic foams were studied. Notably, the SiC ceramic foam derived from the slurry containing 65 wt% filler exhibited low density (0.26 g/cm3), high porosity (90.3%), high compressive strength (3.87 MPa), and low thermal conductivity (0.34 W/mK). The SiC ceramic foams displayed attractive oxidation resistance, and the foams with a porosity of 90.3% can retain 75.2% of their initial compressive strength after oxidation for 10 h at 1400°C.

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Microstructure and thermal shock resistance of ZrO2–Al2O3–A3S2 composites for casting filter materials

Wu,

Wei,

Xie

et al. 2024

Ceramics International

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Polymer-derived ceramic molten metal filters

Cited by 4 publications

References 46 publications

SiOC foam‐aerogel composites: Optimal balance of lightness and excellent thermal insulation

SiOC foam‐aerogel composites: Optimal balance of lightness and excellent thermal insulation

A synergetic poring strategy to prepare high porosity SiC ceramic foam with good mechanical strength

Microstructure and thermal shock resistance of ZrO2–Al2O3–A3S2 composites for casting filter materials

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