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  • 1
    Electronic Resource
    Electronic Resource
    Chemistry of 1,2-Dithiins. Synthesis of the Potent Antibiotic Thiarubrine A (1994)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 116 (1994), S. 10793-10794 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00102a058
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  • 2
    Electronic Resource
    Electronic Resource
    The stereocontrolled synthesis of phthalic acid 4,5-cis-dihydrodiol. An unambiguous structural assignment of the bacterial metabolite of phthalic acid (1992)
    s.l. : American Chemical Society
    The @journal of organic chemistry 57 (1992), S. 3836-3839 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00040a023
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  • 3
    Electronic Resource
    Electronic Resource
    Joining of SiC Ceramic to High Strength Graphite Using Polysiloxane with Active Additive (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 353-358 (Sept. 2007), p. 2092-2095 
    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: In order to contribute to the development of the joining technique of Cf/SiC, joining ofSiC ceramic to high strength graphite was investigated. This joining has been successfully realizedby reaction joining process using a preceramic polymer, polysiloxane, mixed with the activeadditive Al-Si powder as joining material. The weld strength is strongly affected by thetechnological parameters and the ingredient ratio (polysiloxane:Al-Si powder). The optimizedfactors have been obtained by orthogonal experiments, under which the achieved three-pointbending strength of the joints is 96.8% of the strength of the welding base material graphite. Themicrostructure and composition of the weld zone were analyzed by SEM, EDX and XRD. Theresults show that the joining material has transformed into a densified interlayer with the thicknessof about 15μm. Also, diffusion takes place in the interfacial area, which contributes to a soundinterfacial bonding. The interlayer is composed of SiC, Al2O3 and Si
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.2092.pdf
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  • 4
    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
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  • 5
    Electronic Resource
    Electronic Resource
    MPACVD Nanocrystalline Diamond for Biomedical Applications (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 280-283 (Feb. 2007), p. 1595-1598 
    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: In the present paper, nanocrystalline diamond films (NDFs) were fabricated on optical glass using microwave plasma assisted chemical vapor deposition (MPACVD). The suitable processing parameters are as followings: methane concentration 3% in argon, total deposition pressure 13.3 kPa, substrate temperature 500 ℃. The diamond films were characterized by means of scanning electron microscopy (SEM), X-ray diffraction (XRD) and Raman spectroscopy. In vitro osteoblast cell cultures and platelet adhesion tests were applied to evaluate the biocompatibility of the nanocrystalline diamond films (NDFs). All results indicate that the diamond films exhibit better tissue compatibility and hemocompatibility which are very suitable for biomedical applications
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/49/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.280-283.1595.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Characteristics and Mechanism of High pH Stress Corrosion Cracking of Pipeline Steel X70 (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 353-358 (Sept. 2007), p. 219-222 
    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
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.219.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Stress Corrosion Cracking of Pipeline Steel in Soil Environments of Eastern China (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 353-358 (Sept. 2007), p. 223-226 
    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: Stress corrosion cracking (SCC) behaviors of pipeline steel X70 in various near-neutral pHsoil environments with characteristics of eastern China have been studied through electrochemicalmeasurements and slow strain rate tests (SSRT) at various electrode potentials in four solutionscontaining different typical soils in eastern China as well as in NS-4 solution. The SCC susceptibilityin the four soil solutions was generally higher than that in NS-4 solution. There was a general trendthat SCC susceptibility increased with decreasing the potential, suggesting that hydrogen inducedcracking probably plays a key role in the cracking at least at low potentials and the parameters ofcathodic protection in engineering should be carefully optimized to avoid SCC
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.223.pdf
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  • 8
    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
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  • 9
    Electronic Resource
    Electronic Resource
    Wettability of Graphite/Ni plus Cr System (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 368-372 (Feb. 2008), p. 1621-1624 
    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: Carbon fiber reinforced CMCs (ceramic matrix composites) are promising high temperaturestructural materials for aeronautical and astronautical industries. But the engineering application of thematerials strongly depends on the joining technique. As a fundamental research, high strength graphitecan be used to simulate carbon fiber. The study of wettability of graphite by liquid metals contributes tothe development of joining technique of carbon fiber reinforced CMCs. The wettability of graphite/Niplus Cr system was investigated using the sessile drop method. The contact angle was determined by hightemperature photography. The microstructure and composition of the interfacial zone were analyzed bySEM, EDX and XRD. The contact angle of graphite/Ni plus Cr system decreases with increasing the Crcontent. It becomes zero, when the Cr content reaches 50wt%. The wetting of graphite/Ni plus Cr systemis chemical wetting. The contact angle of the system decreases with increasing the wetting temperature orprolonging the holding time. The higher the Cr content, the more remarkable the effects of thetemperature and the holding time on the contact angle are. Microstructure and phase analysis reveals thatinter-diffusions and interfacial reactions take place in the wetting process. The reaction products includeCr3C2. The formation of Cr3C2 contributes to the interfacial bonding and results in the accumulation of Crin the interfacial zone
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.1621.pdf
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  • 10
    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
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