Boron nitride‐reinforced polysilazane‐derived ceramic composites via direct‐ink writing

Kemp, James W.; Hmeidat, Nadim S.; Compton, Brett G.

doi:10.1111/jace.17084

Cited by 38 publications

(17 citation statements)

References 41 publications

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“…[3][4][5] Material extrusion AM processes, on the other hand, are amenable to printing finescale features with a variety of complex architectures and multi-material configurations. [6][7][8] In this work, we formulate, print, and characterize new stainless steel and nickel powder inks for the material extrusion AM process of direct ink write (DIW) to broaden the potential application space of metal AM. DIW utilizes direct deposition of viscoelastic feedstock materials at ambient temperatures, enabling a wide range of materials to be independently or jointly deposited during a build to achieve specific structural or functional properties.…”

Section: Introductionmentioning

confidence: 99%

Material Extrusion Additive Manufacturing of Metal Powder‐Based Inks Enabled by Carrageenan Rheology Modifier

Pack

Compton

2020

Adv Eng Mater

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A new carrageen‐based route to produce metal powder‐based inks tailored for direct ink write additive manufacturing is presented. Aqueous‐based inks are formulated with carrageenan, a red seaweed‐derived polysaccharide, that serves as both a binder and viscosifier, along with 316L stainless steel or nickel powders and dispersants. Thermogravimetric analysis, scanning electron microscopy, and rheological measurements are performed to characterize carrageenan burnout, metal particle morphology, and formulated ink behavior, respectively. Simple (rectangular) and complex (honeycomb and lattice) metallic architectures are 3D‐printed via material extrusion, dried, and pressurelessly sintered in an inert argon atmosphere to produce densified structures. 316L structures exhibit up to 94% theoretical density, attributed to a high solids loading (spherical particle morphology) compared with nickel samples, which display up to 88% theoretical density due to lower solids loading (irregular particle morphology). Micro‐hardness testing and microstructure evaluation are conducted on sintered samples to investigate material properties and sintering behavior. This new carrageenan‐based route is not only simple and non‐toxic but also robust and highly versatile, showing potential to expand application of metal and metal hybrid 3D printing.

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Section: Introductionmentioning

confidence: 99%

Material Extrusion Additive Manufacturing of Metal Powder‐Based Inks Enabled by Carrageenan Rheology Modifier

Pack

Compton

2020

Adv Eng Mater

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“…Ceramic structures were obtained by adding boron nitride powder to polysilazane ink solution to achieve superior mechanical properties. [ 40 ] Similarly, ceramic composites were obtained by adding silicon carbide powder and carbon fiber chops to the polysiloxane ink solution. [ 41 ] A novel method is also described where a solution of polysiloxane preceramic polymer was printed in a support bath/gel made from mixing fumed silica and mineral oil.…”

Section: Introductionmentioning

confidence: 99%

SiOC(N) Cellular Structures with Dense Struts by Integrating Fused Filament Fabrication 3D Printing with Polymer‐Derived Ceramics

et al. 2021

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Great advances have been made in various 3D printing methods for ceramics. Fabrication of Si‐based ceramics using polymer‐derived ceramics (PDCs) is gaining popularity. Using this route, preceramic polymers can be shaped in the polymer state and then pyrolyzed to produce different types of ceramics. Cellular ceramics can be manufactured using this technique. Herein, the novel fabrication of cellular ceramics with a two‐step process using PDCs is reported. First cellular structures are 3D printed with fused filament fabrication (FFF) using thermoplastic polyurethane and impregnated with preceramic polymer polysilazane. Second, pyrolysis of the impregnated structure produces a self‐similar ceramic cellular structure. The impact of 1) catalysts, 2) curing environment, and 3) pyrolysis sequence optimization to form cellular ceramics with fully dense SiOC(N) struts are systemically evaluated. The resultant custom ceramic components can tolerate operating temperatures of 1500 °C and can be manufactured for less than 5% of the cost of competing methods. The ceramic material is shown to be biocompatible and promotes fast cell adhesion. Finally, early‐stage cell activation on the SiOC(N) structure is shown to be tunable by adjusting the porosity with this 3D printing to mimic the bone tissue geometry for bone regeneration.

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“…In recent years, polymer-derived ceramics (PDCs) based on silicon precursor such as polyorganosilazane have been used as precursors for ceramics [ 1 ], as they offer many advantageous properties, in particular excellent adhesion on numerous surfaces [ 2 , 3 ] as well as high thermal and chemical stability [ 4 ]. In addition, polysilazane serves as a component for the preparation of ceramic matrix composites produced by means of additive manufacturing [ 5 , 6 ]. Polyorganosilazane consists of an alternating silicon and nitrogen backbone and is produced on a large scale via ammonolysis of dichlorosilane (R 2 SiCl 2 ) [ 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Crosslinking Behavior of UV-Cured Polyorganosilazane as Polymer-Derived Ceramic Precursor in Ambient and Nitrogen Atmosphere

2021

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Polymer-derived ceramics (PDCs) based on silicon precursor represent an outstanding material for ceramic coatings thanks to their extraordinary versatile processibility. A promising example of a silicone precursor, polyorganosilazane (Durazane 1800), was studied concerning its crosslinking behavior by mixing it with three different photoinitiators, and curing it by two different UV-LED sources under both nitrogen and ambient atmosphere. The chemical conversion during polymerization and pyrolysis was monitored by FTIR spectroscopy. Pyrolysis was performed in a nitrogen atmosphere at 950 °C. The results demonstrate that polyorganosilazane can be cured by the energy-efficient UV-LED source at room temperature in nitrogen and ambient atmosphere. In nitrogen atmosphere, already common reactions for polysilazanes, including polyaddition of the vinyl group, dehydrogenation reactions, hydrosilylation, and transamination reaction, are responsible for crosslinking. Meanwhile, in ambient atmosphere, hydrolysis and polycondensation reactions occur next to the aforementioned reactions. In addition, the type of photoinitiator has an influence on the conversion of the reactive bonds and the chemical composition of the resulting ceramic. Furthermore, thermogravimetric analysis (TGA) was conducted in order to measure the ceramic yield of the cured samples as well as to study their decomposition. The ceramic yield was observed in the range of 72 to 78% depending on the composition and the curing atmosphere. The curing atmosphere significantly impacts the chemical composition of the resulting ceramics. Depending on the chosen atmosphere, either silicon carbonitride (SiCN) or a partially oxidized SiCN(O) can be produced.

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Boron nitride‐reinforced polysilazane‐derived ceramic composites via direct‐ink writing

Cited by 38 publications

References 41 publications

Material Extrusion Additive Manufacturing of Metal Powder‐Based Inks Enabled by Carrageenan Rheology Modifier

Material Extrusion Additive Manufacturing of Metal Powder‐Based Inks Enabled by Carrageenan Rheology Modifier

SiOC(N) Cellular Structures with Dense Struts by Integrating Fused Filament Fabrication 3D Printing with Polymer‐Derived Ceramics

Crosslinking Behavior of UV-Cured Polyorganosilazane as Polymer-Derived Ceramic Precursor in Ambient and Nitrogen Atmosphere

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