Glasartiger Kohlenstoff Sigradur® – ein Werkstoff für Chemie und Technik

Dübgen, R.; Popp, G.

doi:10.1002/mawe.19840151003

Cited by 31 publications

(14 citation statements)

References 5 publications

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“…These requirements lead to a spherical mirror with the properties as listed in Since a self-supporting mirror shell made from a single piece was ruled out, we have developed and constructed, together with DSS 1 , a mirror with a segmented substrate shell and a six-fold radial support structure with spokes matched to the coil cases of the superconducting magnet. As substrate material we have chosen glassy Carbon, an isotropic and homogeneous material produced by pyrolytic conversion of Phenol type resins [17] and commercially available as Sigradur R from the company HTW 2 . After production, the eighteen substrate panels (3 for each sector) have been individually grinded to 2 mm thickness, polished to the required surface roughness and finally machined to the desired shape.…”

Section: Vuv Mirror Caf 2 Window and Gasesmentioning

confidence: 99%

The high-acceptance dielectron spectrometer HADES

et al. 2009

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HADES is a versatile magnetic spectrometer aimed at studying dielectron production in pion, proton and heavy-ion induced collisions. Its main features include a ring imaging gas Cherenkov detector for electron-hadron discrimination, a tracking system consisting of a set of 6 superconducting coils producing a toroidal field and drift chambers and a multiplicity and electron trigger array for additional electron-hadron discrimination and event characterization. A two-stage trigger system enhances events containing electrons. The physics program is focused on the investigation of hadron properties in nuclei and in the hot and dense hadronic matter. The detector system is characterized by an 85 % azimuthal coverage over a polar angle interval from 18• to 85• , a single electron efficiency of 50 % and a vector meson mass resolution of 2.5 %. Identification of pions, kaons and protons is achieved combining time-of-flight and energy loss measurements over a large momentum range. This paper describes the main features and the performance of the detector system.

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Section: Vuv Mirror Caf 2 Window and Gasesmentioning

confidence: 99%

The high-acceptance dielectron spectrometer HADES

et al. 2009

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“…According to Dübgen and Popp[13], the specific resistivity of GC (Sigradur Ò G) is approximately 0.004 X cm 3. Features related to passivation or anodic dissolution of tungsten (according to Lantalme and Salmi[5], at about -0.5 V versus Cl 2 / Cl -) and lithium intercalation in BDD at very negative potentials have also been observed in some cases, but will not be discussed here 4.…”

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confidence: 95%

Deposition of titanium on SiC fibres from chloride melts

Gussone

Hausmann

2011

J Appl Electrochem

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The present study examined the feasibility of producing titanium matrix composites based on a molten salt fibre coating process. It is demonstrated that sufficiently thick and coherent titanium coatings can be deposited on SiC fibres in LiCl-KCl-TiCl 2 at 700 K. One important aspect of the study was the behaviour of the substrate during electrolysis. Therefore, additional features related to carbon-coated SiC fibres and carbonaceous substrates in general are outlined. The morphologies and microstructures of electrolytically coated SiC fibres were investigated by scanning electron microscopy and compared to fibres coated by a physical vapour deposition technique. The cause and relevance of the growth failures that were observed in this study are also discussed.

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“…Copper films of about 1.3 µm thickness were deposited by magnetron sputtering on a 10 × 20 × 1.85 mm 3 vitreous carbon substrate (Sigradur G [11]). For some samples 5 nm to 30 nm thick, carbide-forming bonding layers of other metals were added at the interface.…”

Section: Methodsmentioning

confidence: 99%

Photothermal Evidence of Laterally Inhomogeneous Interfacial Thermal Resistance in Copper-Coated Carbon Samples

et al. 2012

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In this study, the heat transport in copper-carbon flat model systems was studied by frequency-dependent photothermal radiometry (PTR). The samples consist of Cu films of about 1 µm thickness deposited by magnetron sputtering on vitreous carbon (Sigradur). Particular interest was devoted to the influence of interface defects on the interfacial thermal conductance (or resistance) of the CuC systems. The PTR data were analyzed in the frame of a heat diffusion equation for one-and threedimensional heat transport. By comparing PTR signals from as-prepared and from heat-treated samples, the lateral inhomogeneities of the interfacial thermal conductance could be quantified. The measured phase differences were analyzed in the scope of a model where a small part of the surface area has a different interfacial thermal conductance than the major part of the surface.

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Glasartiger Kohlenstoff Sigradur® – ein Werkstoff für Chemie und Technik

Cited by 31 publications

References 5 publications

The high-acceptance dielectron spectrometer HADES

The high-acceptance dielectron spectrometer HADES

Deposition of titanium on SiC fibres from chloride melts

Photothermal Evidence of Laterally Inhomogeneous Interfacial Thermal Resistance in Copper-Coated Carbon Samples

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