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
Filter
Collection
Keywords
Publisher
Years
  • 11
    Electronic Resource
    Electronic Resource
    Preparation of SiOC Foam Ceramics Using Polysiloxane (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 368-372 (Feb. 2008), p. 920-922 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The SiOC foam ceramics were prepared using polyurethane sponge and polysiloxane as rawmaterials. The effects of the pyrolysis temperature, the concentration of polysiloxane solutions, and thecontent of SiC nano-powder on compression strength of the SiOC foam ceramics have been investigatedrespectively. The optimum compression strength of SiOC foam ceramics is obtained at the pyrolysistemperature of 1250ºC and the concentration of solution PSO of 0.8 g/ml. Adding SiC nano-powder intoPSO can effectively increase compression strength of samples, and the maximum compression strength,20.8 MPa, is obtained when the content of SiC nano-powder is 5 wt%. Microstructural study reveals thatthe foam ceramics have an open, uniform and interconnected porous structure with high porosity of 80%
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.920.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 12
    Electronic Resource
    Electronic Resource
    Joining of SiC Ceramic to Graphite Using Ni-51Cr Powders as Filler (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 368-372 (Feb. 2008), p. 1600-1602 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Joining of SiC ceramic to graphite is important from both technical and economical points ofview. High temperature brazing of recrystallized SiC ceramic to high strength graphite has been realizedusing Ni-51Cr (consisting of Ni + 51wt% Cr powders) powders as filler. The obtained maximumthree-point bending strength of joints is 32.3MPa, which is equal to 80.8% of the strength of the graphite.Microstructure and phase analysis reveals that interdiffusions and chemical reactions take place in theweld zone. A reaction layer and an interlayer form in the interfacial area. The reaction layer, of which thethickness is about 60-100μm, is contacted with the SiC ceramic. The interlayer with the thickness ofabout 200μm exists between the graphite and the reaction layer. The reaction layer is mainly composed ofNi2Si, while the interlayer is mainly composed of Cr23C6 and Ni2Si
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.1600.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 13
    Electronic Resource
    Electronic Resource
    Effects of Cold Working and Heat Treatment on Caustic Stress Corrosion Cracking of Alloy 800M (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 297-300 (Nov. 2005), p. 993-998 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The effects of cold working and heat treatment on caustic stress corrosion cracking (SCC) of mill annealed (MA) alloy 800M in boiling solution of 50%NaOH+0.3%SiO2+0.3%Na2S2O3 were investigated by means of microstructure examination, tensile test, X-ray stress analysis, SCC testing of C-rings, Auger electron spectroscopy (AES), scanning electron microscopy (SEM) and metallography.The microstructure of alloy 800M under tested conditions was austenite. With a train of 25% by cold working, the grains of alloy 800M became longer, yield strength (YS) and ultimate tensile strength (UTS) increased, elongation (δ ) decreased, residual stress and the susceptibility to SCC increased. With increasing temperature of heat treatment of alloy 800M with cold working, the grains became bigger , residual stress, YS and UTS decreased and δ increased, the susceptibility to SCC of alloy 800M decreased. In boiling caustic solution, SCC cracks on the surfaces of C-ring specimens polarized potentiostatically at –20mV/SCE initiated from pitting and propagated along grain boundaries. AES analysis indicated that the surface films on MA alloy 800M were enriched in nickel and depleted in iron and chromium
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/50/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.297-300.993.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 14
    Electronic Resource
    Electronic Resource
    Effects of Environmental Factors on Stress Corrosion Cracking of Pipeline Steels (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 297-300 (Nov. 2005), p. 939-944 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Effects of some environmental factors on stress corrosion cracking (SCC) of pipeline steel X-70 both in near-neutral pH environments, including NS4 solution and several solutions containing main types of soil in the eastern part of China, and in high pH solution were studied by means of electrochemical measurement and slow strain rate testing (SSRT). The anodic polarization curves showed different features in near-neutral pH and high pH solutions in terms of active-passive transition behavior. In near-neutral pH solutions, the cracking mode was transgranular with the feature of quasi-cleavage, the susceptibility to SCC increased with decreasing potential, pH and temperature as well as increasing CO2, indicating a dominant mechanism of hydrogen induced cracking (HIC). In high pH solutions, the cracking behavior was similar to that in near-neutral pH solutions when the specimens were polarized at cathodic potentials, but quite different at anodic potentials. A comparison of the electrochemical behavior with the SCC potential region indicated a dominant SCC mechanism associated with anodic dissolution (AD) of X70 in high pH solution at anodic potentials. A preliminary experimental potential (E)-pH-SCC diagram has been established for X70 in near-neutral pH environments
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/50/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.297-300.939.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 15
    Electronic Resource
    Electronic Resource
    Joining of SiC Ceramic by High Temperature Brazing Using Ni-Cr-SiC Powders as Filler (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 2394-2397 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Joining of ceramics is of importance from both technical and economical points of view.Brazing is a widely used process to join ceramics. In order to increase the working temperature and weldstrength of joints, a high temperature brazing process using Ni-Cr-SiC powders (consisting of Ni, Cr andSiC powders) as filler to join recrystallized SiC ceramic has been investigated. The obtained optimizedtechnological parameters are joining temperature of 1360°C, holding time of 5min and filler mass of280mg. Under these conditions the maximum relative bending strength of joints, 70.5%, is achieved.Microstructure and phase analysis reveals that interdiffusions and chemical reactions take place in theweld zone. A reaction layer, of which the major phase is Ni2Si, exists between the welding base materialSiC ceramic and the filler reaction product layer, called as interlayer, of which the major phase is Cr23C6
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.2394.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 16
    Electronic Resource
    Electronic Resource
    Effect of Cyclic Loading on Crack Propagation of X-70 Pipeline Steel in Near-Neutral pH Solution (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 297-300 (Nov. 2005), p. 2501-2507 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Crack propagation of X-70 pipeline steel in near-neutral pH solution was studied under different modes of cyclic loading. A revised equation of crack growth rate vs. Δ K was obtained. Average crack growth rate increased with cycles under conditions of different R values. Linear shape notch specimen made cracks much easier to initiate and propagate than V-shaped notch specimen did. For different R values, the curves of crack growth rate with cycles were similar, but the platformpropagation period and quick propagation period were different obviously. Crack growth rate at both periods increased and thus failure time decreased markedly with decrease of R value. The propagation directions of cracks were different under different cyclic loading conditions. Under mode I (single tensile stress) cyclic loading, cracks were straight and perpendicular to the tensile stress axis, while under mixed-mode I/III (tensile/shear stress) cyclic loading, cracks were sinuousand did not propagate in the direction perpendicular to the main tensile stress axis
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/50/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.297-300.2501.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 17
    Electronic Resource
    Electronic Resource
    FCVA-Synthesized Tetrahedral Amorphous Carbon Films for Biomedical Applications (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 1577-1580 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Tetrahedral amorphous carbon (ta-C) films were deposited onto Si(100) wafers by usingfiltered cathodic vacuum arc technique (FCVA). The influence of the negative bias voltage applied tosubstrates on film structures was studied by Raman spectroscopy, X-ray photoemission spectroscopy(XPS). The ta-C films showed maximal sp3 fractions 87%, the hardness and elastic modulus of the ta-Cfilm is 72 and 480 GPa, respectively. In vitro measurements of contact angle and platelet adhesion wereapplied to evaluate the biocompatibility of the ta-C films in comparison with that of NiTi, 316L and puretitanium. The results show that the ta-C films have hydrophobicity and exhibit better hemocompatibilitywhich are very suitable for biomedical applications
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.1577.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 18
    Electronic Resource
    Electronic Resource
    Joining of SiC Ceramic by Hot Pressing Reaction Joining Process Using Ni-51Cr Powders as Filler (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 2398-2401 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Joining of ceramics is of importance from both technical and economical points of view.Joining of recrystallized SiC ceramic to itself has been realized by hot pressing reaction joining processusing Ni-51Cr powders (consisting of Ni+51wt%Cr powders) as filler. The optimized technologicalparameters have been obtained by orthogonal experiment, which are joining temperature of 1150°C,holding time of 20min, joining pressure of 10MPa and cooling rate of 0.25°C/s. The most effective factorto influence the weld strength is joining pressure within the range of testing. Under the optimizedconditions, the maximum relative bending strength of joint, 70.7%, is achieved. The microstructure andphase composition of the weld zone were examined by SEM, EDX and XRD. The results show thatinterdiffusions and chemical reactions take place in the joining process. A reaction layer, which is mainlycomposed of Ni2Si and Ni3C with a little Cr, exists between the welding base material SiC ceramic andthe filler reaction product layer called as interlayer, which is mainly composed of Ni2Si and Cr
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.2398.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 19
    Electronic Resource
    Electronic Resource
    Synthesis, characterization and function of ternary copper(II) complexes (1997)
    Springer
    Transition metal chemistry 22 (1997), S. 109-112 
    Details
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Ternary complexes of glycine, alanine, β-alanine, serine and ethylenediamine with copper iminodiacetate have been prepared and characterized by their i.r., u.v.-vis. and e.s.r. spectra. The data suggest that the complexes possess axial symmetry and a distorted octahedral configuration in aqueous solution. The H2O molecule on the axial copper site can be replaced by O2−. The bonding parameters, which fall between 0.84 and 0.88, indicate that the bonds between copper(II) and the ligands possess more ionic character. The ternary complex containing serine displays the highest catalytic activity in dismutation of the superoxide radical O2−. This activity may be explained on the basis of the stabilization of CuII-O2− by hydrogen bonding.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018498626343
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 20
    Electronic Resource
    Electronic Resource
    Preparation of Spherical Hydrous Silica Oxide Particles under Acidic Condition via Sol-Gel Processing (2000)
    Springer
    Journal of sol gel science and technology 19 (2000), S. 329-332 
    Details
    ISSN: 1573-4846
    Keywords: sol-gel processing ; acidic condition ; spherical silica particles ; particle size control ; encapsulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Preparation of spherical hydrous silica oxide particles via sol-gel processing was rarely reported. In this study, spherical silica particles were obtained in TEOS/AcOEt/AcOH 50% aq. system. The combination of AcOEt and AcOH 50% aq. widened the spherical particle-forming region. Their size ranged from some ten micrometers to some hundreds micrometers. Hydrophilic molecules or powders like Rhodamine 6G and phosphorescent powders were encapsulated in the spherical particles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008737800303
    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...