ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Multi-Walled Carbon Nanotube Coatings Using Electrophoretic Deposition (EPD) (2005)
    Oxford, UK : Blackwell Science Inc
    Journal of the American Ceramic Society 88 (2005), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A method based on electrophoretic deposition (EPD) has been developed to produce uniform deposits of multi-walled carbon nanotubes on stainless-steel substrates. Aqueous suspensions were used under constant voltage conditions in the range of 5–50 V, with deposition times ranging from 0.5 to 10 min. The thickness of the coatings was controlled by variation of voltage and deposition time during EPD. Coatings of up to 10 μm thickness were achieved, with a homogeneous microstructure. The EPD technique is fast, effective, and can be applied to complex shapes. Possible applications are in heat extraction devices or porous coatings for tissue engineering scaffolds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1551-2916.2005.00155.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    FRACTURE CHARACTERISTICS OF BOROSILICATE GLASSES REINFORCED BY METALLIC PARTICLES (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Fatigue & fracture of engineering materials & structures 20 (1997), S. 0 
    Details
    ISSN: 1460-2695
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract— The fracture behaviour of borosilicate glass reinforced by molybdenum and/or vanadium particles has been investigated. For the addition of 5 vol% molybdenum particles, two processing procedures have been tested and the influence of volume fraction of vanadium particles (in the range 2 to 30 vol%) on fracture resistance has been assessed. The use of chevron-notched specimens in three-point bending has been shown to be a reliable method for the evaluation of fracture toughness even at toughness levels of order 0.7 to 1.3 MPa √m. The existence of subtle differences in fracture behaviour of glass-composites having comparable volume fractions of molybdenum particles but obtained by two different processing procedures has been established by statistical treatment of the fracture toughness data. An increase in the volume fraction of metallic particles results in an increase of the fracture resistance and the measured fracture toughness level. Toughening mechanisms which have been identified include both the plastic deformation of particles and the bridging of cracks by ductile particles. Some particle cleavage and debonding has been observed, which indicates that a decrease in particle plasticity, probably induced by processing or due to constraints imposed by the rigid matrix, is responsible for a smaller than expected enhancement of the fracture toughness.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb01484.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Alternative Uses of Waste Glasses: Issues on the Fabrication of Metal Fibre Reinforced Glass Matrix Composites (1998)
    Springer
    Applied composite materials 5 (1998), S. 207-222 
    Details
    ISSN: 1573-4897
    Keywords: recycling ; waste glass ; composites ; metal fibre reinforcement ; electrophoretic deposition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract In order to investigate a potential use for recycled speciality glasses (specifically those containing hazardous elements), a processing route has been developed for the fabrication of metallic fibre mat reinforced glass matrix composites. Commercially available 3-dimensional stainless steel 316L fibre mats were used as the metal reinforcement, and a borosilicate glass which had been used previously in radiation experiments was used as the glass matrix. The fibre mats were infiltrated with a commercially available silica sol using electrophoretic deposition (EPD), and the glass matrix was laid in between infiltrated fibre mats prior to consolidation using uniaxial cold pressing. It was found that composites with sufficient integrity could be obtained from this recycled waste glass after sintering in air at 850°C for 1 h. The deposited silica remained amorphous at the processing temperature, providing a porous interface between the metallic reinforcement and the waste glass matrix. The processing issues involved in composite fabrication, namely, the EPD infiltration parameters for the silica sol, the quantity and subsequent effect of the impurities present in the waste glass, and the densification of the composite material on sintering, have been discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008858405686
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Thermoschockbeständigkeit und das Verhalten von SiC-faserverstärkten Glas-Matrix-Verbundwerkstoffen bei einer thermischen Wechselbeanspruchung (1998)
    Springer
    Forschung im Ingenieurwesen 64 (1998), S. 143-156 
    Details
    ISSN: 1434-0860
    Source: Springer Online Journal Archives 1860-2000
    Topics: Technology
    Description / Table of Contents: Abstract The damage evolution of commercially available SiC-NicalonTM fiber-reinforced glass matrix composites under thermal shock and thermal cycling conditions in oxidizing atmospheres was investigated. The thermal shock tests involved quenching the samples from high temperatures (590–710°C) to room temperature in a water bath. For the thermal cycling tests the samples were quickly alternated between high temperature (T = 700°C) and room temperature air for different number of cycles. Both destructive and non-destructive techniques were employed to characterize the samples and to detect differences in behavior for the various thermal loading conditions. In thermally shocked samples, damage in the form of matrix microcracks was induced by quenching from intermediate temperatures, e.g. 660°C. The extent of damage increased with the number of thermal shock cycles, as detected by a decrease in the Young's modulus and a simultaneous increase in the internal friction measured non-destructively be a mechanical force resonance technique. In thermally cycled samples, material degradation was ascribed to porosity formation in the matrix as a consequence of the extended exposures at high temperatures. With increasing number of cycles, also interfacial oxidation was detected. An attempt was made also to explore the possibility of healing the induced microcracks in thermally shocked samples by an optimized post-thermal shock heat-treatment (annealing) schedule, exploiting the viscous flow of the glass matrix.
    Notes: Zusammenfassung  Das Schädigungsverhalten von kommerziellen SiC-Nicalon TM faserverstärkten Glas-Matrix-Verbundwerkstoffen bei einer Thermoschockbelastung und thermischen Wechselbeanspruchung in einer oxidierenden Atmosphäre wurde untersucht. Die Thermoschockprüfung bestand aus Abkühlen von hohen Temperaturen (590°C–710°C) auf Raumtemperatur in einem Wasserbad. Bei der Wechselbeanspruchung wurde der Werkstoff in Luftatmosphäre von einer hohen Temperatur (T = 700°C) in Raumtemperaturumgebung eine definierte Anzahl von Zyklen bewegt. Zerstörende sowie zerstörungsfreie Prüfverfahren wurden zur Werkstoffcharakterisierung angewendet, mit dem Ziel die Unterschiede im Werkstoffverhalten bei verschiedenen Bedingungen der thermischen Belastung zu finden. Schädigung in Form von Matrixrissen wurde nach der Thermoschockbelastung beim Abkühlen von mittleren Temperaturen, ca. 660°C, festgestellt. Die Schädigung wuchs mit der steigenden Anzahl von Thermoschockzyklen, was durch einen Abfall des Elastizitätsmoduls bei gleichzeitigem Anstieg der inneren Reibung mittels mechanischer Kraftresonanzmethode zerstörungsfrei nachgewiesen werden konnte. Bei der Wechselbeanspruchung kam es zur Werkstoffdegradation aufgrund der Porositätsbildung in Folge eines länger andauernden Einflusses von hohen Temperaturen. Die Möglichkeiten der Heilung von Mikrorissen, die bei der Thermoschockbelastung entstanden sind, wurden untersucht. Hierzu wurde der beanspruchte Werkstoff einer optimierten Wärmebehandlung (Tempern), die zum viskosem Fließen des Glasmatrix führte, ausgesetzt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00010771
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Processing and mechanical properties of biocompatible Al2O3 platelet-reinforced TiO2 (1996)
    Springer
    Journal of materials science 31 (1996), S. 4375-4380 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The mechanical behaviour of Al2O3 platelet-reinforced TiO2 bioceramics produced by hot-pressing has been investigated. The variation of the elastic constants, fracture strength and fracture toughness with the volume fraction of platelet content was studied. The addition of platelets did not affect the critical flaw size of the composites. This fact, and the good matrix/platelet interfacial bond resulted in a simultaneous increase of the fracture strength and toughness. The mechanical properties increased from KIc=2.4 MPa m1/2 and σ0=215 MPa for pure TiO2 to KIc=3.3 MPa m1/2 and σ0=265 MPa for a 30 vol% platelet-containing composite. The indentation technique demonstrated the anisotropic behaviour of the fracture toughness in the composites due to platelet orientation during hot-pressing. Load transfer was identified as the main reinforcing mechanism and the toughening effect could be assessed by a load transfer-based model equation. Fracture surface analysis showed mainly intercrystalline fracture for the TiO0 matrix, whilst with the composites, fracture became more transcrystalline with increasing platelet content.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00356463
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Theoretical and experimental considerations on the thermal shock resistance of sintered glasses and ceramics using modelled microstructure-property correlations (1996)
    Springer
    Journal of materials science 31 (1996), S. 463-469 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The thermal shock resistance of brittle materials such as glass and ceramics is one of their weaknesses. Pores and other incorporated second phases in these materials alter these properties which are decisive for thermal shock behaviour, and may therefore increase this behaviour in a precalculable manner. It has been theoretically demonstrated when and why porosity leads to an improvement in thermal shock resistance. The thermal shock resistance for porous borosilicate sintered glass and porous eutectic calcium titanate ceramic have been calculated and compared to experimental values. The results confirm that low porosities lead to an improvement in thermal shock resistance, that the thermal shock resistance has a maximum at a certain porosity, and that above certain porosities, the presence of pores deteriorates the thermal shock resistance. If porous materials are considered as a special case of composite materials, then relations valid for porous materials can be transferred to composite materials and vice versa (“composite concept”). This has been investigated using the examples of borosilicate sintered glass with incorporated antimony particles and eutectic calcium titanate ceramic with incorporated paladium particles. In the case of the glass-antimony composite material, improvements in thermal shock resistance of about 15% with 10 vol % antimony incorporation, were calculated and confirmed experimentally, while for calcium titanate-palladium composite materials, a 15% improvement in thermal shock resistance was already achieved with about 5 vol % metallic phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01139165
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Prediction of the Poisson's ratio of porous materials (1996)
    Springer
    Journal of materials science 31 (1996), S. 1643-1646 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract An equation is presented for the prediction of the Poisson's ratio of porous materials. The equation is strictly derived for spherical porosity and isotropic materials and it is valid for the whole porosity range. For low porosity, the equation coincides with a published equation, which has been verified in the past by comparison with extensive experimental data. For the high-porosity range, the theoretical variation of the Poisson's ratio exhibits a trend converging to a value ν P =0.5, when the porosity increases to P=1, A similar converging trend has been found in other theoretical studies, but a rigorous experimental verification of such variations has still to be carried out.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00357876
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Influence of Stress Concentrations on the Mechanical Property– porosity Correlation in Porous Materials (1998)
    Springer
    Journal of materials science 17 (1998), S. 1273-1275 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006503524162
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Thermal shock resistant Al2TiO5-glass matrix composite (1999)
    Springer
    Journal of materials science 18 (1999), S. 1907-1909 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006660510436
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Colloidal processing of mullite ceramics: Are silica-alumina “composite” precursor particles essential? (2000)
    Springer
    Journal of materials science 19 (2000), S. 1687-1688 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006738809679
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...