Processing of preceramic polymer to low density silicon carbide foam

Jana, Prasanta; Zera, Emanuele; Sorarù, Gian Domenico

doi:10.1016/j.matdes.2016.12.010

Cited by 66 publications

(38 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Interestingly, unlike the foams obtained through the replica method using ceramic slurries, which have hollow struts, in the present case the struts are dense. The SiC foams have bulk and skeletal density of 0.16 and 2.41 g/cm 3 , respectively, resulting in 93% open porosity (see Table ) and they are X‐ray amorphous …”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Polymer‐derived ceramic aerogels as sorbent materials for the removal of organic dyes from aqueous solutions

et al. 2017

Self Cite

View full text Add to dashboard Cite

Polymer‐derived SiC and SiOC aerogels have been synthesized and characterized both from the microstructural point of view and as sorbent materials for removing organic dyes (Methylene Blue, MB, and Rhodamine B, RB) from water solutions. Their adsorbent behavior has been compared with a polymer‐derived SiC foam and a commercial mesoporous silica. The aerogels can efficiently remove MB and RB from water solution and their capacity is higher compared to the SiC foams due to the higher surface area. The SiOC aerogel remains monolithic after the water treatment (allowing for an easy removal without the need of a filtration step) and its maximum capacity for removing MB is 42.2 mg/g, which is higher compared to the studied mesoporous silica and many C‐based porous adsorbents reported in the literature. The reason for this high adsorption capacity has been related to the unique structure of the polymer‐derived SiOC, which consists of an amorphous silicon oxycarbide network and a free carbon phase.

show abstract

Section: Resultsmentioning

confidence: 99%

“…Thermogravimetric analysis (TGA) was recorded with a Netzsch STA 409 equipment (Netzsch Geraetebau Gmbh, Selb, Germany) at 5°C/min in air flow (30 cc/min) up to 1300°C. Microstructural characterization of the SiC foam was already performed in a previous work and the details are available in the literature …”

Section: Methodsmentioning

confidence: 99%

Polymer‐derived ceramic aerogels as sorbent materials for the removal of organic dyes from aqueous solutions

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…The closest research work to this approach was proposed by Szczurek et al when they showed the possibility of processing carbon periodic cellular architectures by coating, using hydrothermal conditions, a 3D printed polymeric lattice with a resorcinol‐formaldehyde resin followed by high‐temperature pyrolysis. On the other hand, the PDC process was used to replicate polyurethane foams and, accordingly, different reticulated ceramic foams in the general Si–C–O system have been obtained . This method has been shown to be simple and cost effective, and allows for the control of the density of the final ceramic foam by varying the polymer/PU foam mass ratio used in the impregnation step.…”

Section: Introductionmentioning

confidence: 99%

Polymer‐derived SiCN cellular structures from replica of 3D printed lattices

et al. 2018

Self Cite

View full text Add to dashboard Cite

In comparison with metals and polymers, ceramics and/or carbon are more difficult to process into well‐defined cellular architectures (e.g., cubic, tetrakaidecadehron, etc.) using Additive Manufacturing techniques. The present work reports a simple method for generating complex and precise SiCN ceramic lattices using a preceramic polymer and applying the replica approach to structures fabricated using stereolithography of plastic materials, with the associated ease of fabrication. Three‐dimensional printed plastic lattices impregnated with a polysilazane were converted to SiCN by pyrolysis at 1000°C in inert atmosphere. In spite of the high amount of mass loss (~58%) and volume shrinkage (~65%), the impregnated structures did not collapse during pyrolysis, leading to highly porous (total porosity ~93 vol%) components possessing suitable strength for handling and potential use as lightweight components.

show abstract

“…However, due to the lack of defect tolerance, catastrophic failures may occur when ceramics were subject to machining processes 9 . The polymer to ceramic transformation route, denoted as polymer‐derived ceramic (PDC), is one of the key technique breakthroughs in ceramic manufacturing field; the liquid polymer precursors can provide ceramics with a designed chemical composition and prefect workability 10–15 . Many scholars have therefore explored the application of PDC in sensor manufacture.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of high‐fracture‐strength and gas‐tightness PDC films via PIP process for pressure sensor application

Liu

Zhang

et al. 2020

J Am Ceram Soc

View full text Add to dashboard Cite

High‐fracture‐strength and high‐gas‐tightness thin‐film gas‐pressure sensors were fabricated using a silicon oxycarbonitride polymer‐derived‐ceramic (SiCNO‐PDC) material via a multiple polymer‐infiltration‐pyrolysis (PIP) process. To obtain dense SiCNO ceramic films, two types of liquid polyvinylsilazane (PVSZ) precursors were chosen; a high‐ceramic‐yield precursor with high viscosity (PVSZ‐1) was designed to construct the skeleton of ceramic film, whereas a relatively high‐ceramic‐yield precursor with low viscosity (PVSZ‐2) was designed to infiltrate in ceramic defects. The results confirmed that the PVSZ‐2 can effectively fill both intergranular and intragranular defects of ceramic films pyrolyzed by the PVSZ‐1, and produce the sponge‐like structures with nanosized pores. Although the density of the ceramic films only increased by 2.2%‐5.2% after PIP process, the gas tightness was fundamentally improved, and all ceramic films after PIP process could keep gas‐tight condition without loss of pressure after 72 hours. Similarly, the fracture strengths of the ceramic films after PIP cycles have also been improved, and the value could reach 108 MPa after only three PIP cycles. In addition, because a linear relationship among the load, resonant frequency, and deflection was detected in our ceramic films, the wireless passive gas‐pressure sensors with high‐sensitivity and high‐temperature resistance have been fabricated. It strongly indicates that the ceramic films obtained by our PIP process have real potential to be used as thin‐film gas‐pressure sensing elements in high‐temperature and high‐pressure fields.

show abstract

Processing of preceramic polymer to low density silicon carbide foam

Cited by 66 publications

References 45 publications

Polymer‐derived ceramic aerogels as sorbent materials for the removal of organic dyes from aqueous solutions

Polymer‐derived ceramic aerogels as sorbent materials for the removal of organic dyes from aqueous solutions

Polymer‐derived SiCN cellular structures from replica of 3D printed lattices

Fabrication of high‐fracture‐strength and gas‐tightness PDC films via PIP process for pressure sensor application

Contact Info

Product

Resources

About