Herstellung und Charakterisierung von Polymerhölzern auf der Basis von niedrig-viskosen Epoxidharzen

Schroeder, P.; Parameswaran, N.

doi:10.1515/hfsg.1986.40.1.51

Cited by 70 publications

(17 citation statements)

References 3 publications

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“…As the CVD and solid-state reactions [160,166,167] used for thin-film synthesis methods are processes running close to thermodynamic equilibrium, they are nearer to the bulk synthesis methods than to physical vapour deposition (PVD) methods. In recent years, several researchers have in addition synthesised a wide range of MAX phases compositions [7,9,10,53,60,74,77,113,152,156,[168][169][170][171][172][173][174][175][176][177] and, in particular, Cr 2 AlC [7,9,71,74,77,113,156,168,176,[178][179][180][181] either by sputtering from elemental targets of the Cr 2 AlC-MAX phases or compound targets or by reactive sputtering or by using magnetron sputtering [7,9,30,31,74,77,113,168]. For laboratory-scale synthesis, the use of three elemental targets has proven to be a reliable method for the synthesis of the MAX carbides.…”

Section: Synthesis Methodsmentioning

confidence: 99%

“…Furthermore, Emmerlich et al [110] proposed a model for the decomposition mechanism of Ti 3 SiC 2 epitaxial thin films in vacuum, which was suggested to be relevant for any MAX phase vacuum annealing experiment [7]. For example, Schroeter [113] has observed similar decomposition processes for dc magnetron sputtered Cr 2 AlC coatings. It was found that these coatings decomposed slowly and continuously at temperatures of >750°C into Cr 7 C 3 due to a process of Al outward diffusion and evaporation.…”

Section: Stability and Prediction Of New Max Phasesmentioning

confidence: 99%

“…112,[221][222][223], and studies related to how the substrate temperature, pressure, substrate inclination angle, target current, voltage, substrate distance from target, pulse length (if pulsed) and bias influence the MAX phase film microstructure [e.g. 9, 30,31,71,74,113,168,176,[221][222][223], despite these dependencies having been extensively studied for other materials [e.g. [186][187][188][189][190][191][192][193][224][225][226][227][228][229][230][231].…”

Section: Max Phase Pvd Coatingsmentioning

confidence: 99%

“…However, Cr 2 AlC MAX phase has been shown to crystallise on polycrystalline substrates at a substrate temperature of 450°C [e.g. 9, 30,31,113,236]. Further lowering the deposition temperature leads to the synthesis of additional metastable solid solution or/and to the production of amorphous layer [30,71,236].…”

Section: Max Phase Pvd Coatingsmentioning

confidence: 99%

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The correlation between structure, multifunctional properties and application of PVD MAX phase coatings. Part I. Texture and room temperature properties

Berger

2019

Surface Engineering

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Recent research has highlighted the potential of MAX phase properties including its machinability, good mechanical behaviour, high electric and thermal conductivity as well as good oxidation and erosion resistance to a range of applications including electrical contact coatings, high-temperature heating elements, and barrier-and protection coatings in gasturbine engine. Successful engineering of MAX phases requires an understanding of how the manufacturing conditions and the deposition parameters influence the composition, crystallographic, electronic structure and morphology. It is, in turn, important to know how these determine the anisotropy of physical, mechanical and technological properties of the material. A focus point of this part of the review is the systemic study of the regular trends in the preparation parameter-structure-properties relationships of MAX phase coatings. In particular, the Cr-Al-C (Y) coating synthesised by the HIPIMS technique will be considered and compared with other synthesised MAX phase bulk ceramics and coatings.

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Section: Synthesis Methodsmentioning

confidence: 99%

Section: Stability and Prediction Of New Max Phasesmentioning

confidence: 99%

Section: Max Phase Pvd Coatingsmentioning

confidence: 99%

Section: Max Phase Pvd Coatingsmentioning

confidence: 99%

See 2 more Smart Citations

The correlation between structure, multifunctional properties and application of PVD MAX phase coatings. Part I. Texture and room temperature properties

Berger

2019

Surface Engineering

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“…The molecular weight of the lignin was reduced after solvent extraction (table 3). Solvent extraction, depends on the selected solvent, has been sued for extraction of low molecular weight fraction of lignin [50][51][52]55]. The fraction soluble in ethanol was about 38% of the total mass of lignin which shows the majority of lignin remains as an insoluble part.…”

Section: Results and Discussion (A) Properties Of Ligninmentioning

confidence: 99%

Upscaling of lignin precursor melt spinning by bicomponent spinning and its use for carbon fibre production

Bostan¹,

Hosseinaei

Fourné³

et al. 2021

Phil. Trans. R. Soc. A.

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Upscaling lignin-based precursor fibre production is an essential step in developing bio-based carbon fibre from renewable feedstock. The main challenge in upscaling of lignin fibre production by melt spinning is its melt behaviour and rheological properties, which differ from common synthetic polymers used in melt spinning. Here, a new approach in melt spinning of lignin, using a spin carrier system for producing bicomponent fibres, has been introduced. An ethanol extracted lignin fraction from LignoBoost process of commercial softwood kraft black liquor was used as feedstock. After additional heat treatment, melt spinning was performed in a pilot-scale spinning unit. For the first time, biodegradable polyvinyl alcohol (PVA) was used as a spin carrier to enable the spinning of lignin by improving the required melt strength. PVA-sheath/lignin-core bicomponent fibres were manufactured. Afterwards, PVA was dissolved by washing with water. Pure lignin fibres were stabilized and carbonized, and tensile properties were measured. The measured properties, tensile modulus of 81.1 ± 3.1 GPa and tensile strength of 1039 ± 197 MPa, are higher than the majority of lignin-based carbon fibres reported in the literature. This new approach can significantly improve the melt spinning of lignin and solve problems related to poor spinnability of lignin and results in the production of high-quality lignin-based carbon fibres. This article is part of the theme issue ‘Bio-derived and bioinspired sustainable advanced materials for emerging technologies (part 2)’.

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Sputtering and Characterization of MAX‐Phase Forming Cr–Al–C and Ti–Al–C Coatings and Their Application on γ‐Based Titanium Aluminides

et al. 2021

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MAX‐phases are of increasing interest as coating material for high temperature applications due to their unique metallic as well as ceramic properties. Herein, the deposition of Cr2AlC and Ti3AlC2 or Ti2AlC MAX‐phase forming coatings by magnetron sputtering is demonstrated. Using pure elemental targets, the manufacturing with a coating thickness of above 7 μm is established. The MAX‐phase forming coatings are characterized by high‐temperature X‐ray diffraction (HT‐XRD) measurements and provide a good oxidation behavior due to the development of protective thermally grown oxide layers. The performance of the MAX‐phases is strongly depended on the substrate material and the accompanying interdiffusion processes. Therefore, the Ti–Al–C coating is favored for TiAl alloys due to the thermodynamic stability of the Ti2AlC MAX phase in particular in the presence of the γ‐TiAl phase. An excellent oxidation behavior is confirmed up to 300 h at 850 °C due to the development of an alumina layer above a homogenous Ti2AlC phase coating. The Cr2AlC MAX‐phase coating degrades after 100 h at 800 °C due to interdiffusion processes between coating and substrate and the accompanying development of carbides and nitride phases. Nevertheless, the oxidation resistance of the Cr–Al–C‐coated TiAl alloy is given by the formation of the Ti2AlC MAX‐phase.

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Herstellung und Charakterisierung von Polymerhölzern auf der Basis von niedrig-viskosen Epoxidharzen

Cited by 70 publications

References 3 publications

The correlation between structure, multifunctional properties and application of PVD MAX phase coatings. Part I. Texture and room temperature properties

The correlation between structure, multifunctional properties and application of PVD MAX phase coatings. Part I. Texture and room temperature properties

Upscaling of lignin precursor melt spinning by bicomponent spinning and its use for carbon fibre production

Sputtering and Characterization of MAX‐Phase Forming Cr–Al–C and Ti–Al–C Coatings and Their Application on γ‐Based Titanium Aluminides

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