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  • 1
    Electronic Resource
    Electronic Resource
    Research on the In Situ Fabrication of Bioceramic Composite Coatings by Laser Cladding (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 330-332 (Feb. 2007), p. 625-628 
    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: Hydroxyapatite(HAP) has excellent osteoconductive properties. By controlling the Ca/Pratio better biphasic calcium phosphate ceramics can be produced than pure HAP ceramics. β-calcium pyrophosphate(β-Ca2P2O7) is a new biodegradable ceramic material and its biologicalresponse is quite similar to HAP. Obtaining HAP and other bioactive calcium phosphate ceramiccoatings has been a popular research field in the past. In our research a new bioceramic compositecoating was obtained by laser cladding with pre-depositing mixed powders of CaHPO4·2H2O andCaCO3 directly on the metal substrate. Its main constituents are HAP and β-Ca2P2O7. Themicrostructure of the coating consists of minute granular HAP that is distributed among theoverlapped club-shaped or needle-like β-Ca2P2O7. The hardness distribution in the cladding layer iseven and its value is much higher than that in the substrate. There is a bonded structure of theepitaxial planar growth between the substrate and cladding layer, and both a typical cellularmicrostructure in the middle and an equiaxed microstructure at the top of the cladding layer
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.330-332.625.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Mouse-related dermatosis (2004)
    Oxford, UK : Blackwell Science Ltd
    International journal of dermatology 43 (2004), S. 0 
    Details
    ISSN: 1365-4632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-4632.2004.02299.x
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  • 3
    Electronic Resource
    Electronic Resource
    Phase and Morphological Transformation of Preformed AZ91D Magnesium Alloys in Remelting (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 475-479 (Jan. 2005), p. 473-476 
    Details
    ISSN: 1662-9752
    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 phase and morphological transformation during the remelting process was investigated by isothermal soaking and rapidly quenching of preformed AZ91D magnesium alloys in semisolid state. It was revealed that the morphological transformation of preformed alloys is crucial to obtain homogenously fine spheroidal grains and affect the final forming ability. The transformation is divided into two stages, local remelting of the whole experiment and partial remelting of the respective grains, which behave as liquid bands and liquid cells structures, respectively. In the partial melting, the lower melting point phase, β-Mg17Al12, diffused to the grains boundary and center of the grains and separated to Al2Mg and Mg. The Al2Mg and Mg phases with lower melting points melt into cells structures. The final microstructure of the remelting experiments is composed of cells structures, spheroidal grains and liquid phase
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/09/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.475-479.473.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    The Electromagnetic Confinement and Shaping Process of Liquid Metal (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 475-479 (Jan. 2005), p. 281-284 
    Details
    ISSN: 1662-9752
    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 Electromagnetic Confinement and Shaping (EMCS) process is a crucibleless melting and mouldless shaping technology by alternating magnetic field. In this paper, stability of the shaping, effect factors of the electromagnetic force and the temperature field and the procedure of the EMCS process are systemically analyzed. The Results indicate that a good coupling of the temperature field and the electromagnetic force is important to stably shape for liquid metal, and the gravity force of liquid metal is more sensitive to change of the temperature (or the current through the inductor) than the electromagnetic force does above the melting point of the sample. Several stainless steel samples were obtained by EMCS process
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/09/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.475-479.281.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    The Behavior of AlTiC Master Alloys in Grain Refining of Commercial and High Pure Aluminum (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 475-479 (Jan. 2005), p. 313-316 
    Details
    ISSN: 1662-9752
    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 AlTiC master alloy has been prepared in different components to refine 99.8%Aland 99.98％Al, then compared to two typical Al5Ti1B in refining efficiency and the grain nuclear. The result showed that the refining efficiency seemed better if the nucleation of high pure aluminum revealed complexity and variety. It may due to that the latency heterogeneous nucleation was efficient on the whole, consequently accelerated refining efficiency
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/09/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.475-479.313.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Microstructural Evolution of Undercooled Ni-40wt%Pb Hypermonotectic Alloy (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 475-479 (Jan. 2005), p. 2651-2654 
    Details
    ISSN: 1662-9752
    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: Microstructural evolution of bulk undercooled Ni-40wt%Pb hypermonotectic alloy was systematically investigated by using molten glass purification and superheating cycling. Within the achieved undercooling range, the microstructures were classified into three categories. When the undercooling was less than 50K, the microstructure consisted of coarse dendritic grain and interdendritic Pb lumps. Increasing undercooling to the range 100 to 198K, macrosegregation was serious. When the undercooling was up to 292K, refined granular grain with homogeneously distributed fine Pb particles on it formed. The granulation mechanism of granular grains was owing to dendritic disintegration and subsequent recrystallization
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/09/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.475-479.2651.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Directional Solidification of Undercooled Hypoeutectic Silver-Copper Alloy Melt (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 475-479 (Jan. 2005), p. 2607-2610 
    Details
    ISSN: 1662-9752
    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: Directional solidification of the undercooled melt which combines melt undercooling with conventional directional solidification is a new method of obtaining directional structure. This method is used to realize the directional solidification of the undercooled Ag70.3Cu29.7 melt. The experiment is performed in two steps: The undercooled melt is obtained by glass fluxing, and the above specimen is remelted and excited with Ga-In-Sn coolant. By this method, directional solidification dendrites of Ag70.3Cu29.7 alloy are achieved successfully. The columnar dendrites are straight and fine. The primary arm spacing is 21µm in average for a 65K undercooling, as compared to 38µm for a 32K undercooling. This confirms that higher undercooling promotes finer dendritic microstructures
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/09/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.475-479.2607.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Microstructure and Bonding Feature of the Bioceramic Composite Coating Obtained by Nd: YAG Laser Cladding (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 361-363 (Nov. 2007), p. 697-700 
    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: Undesirable phase and microstructure formation, and poor HAP/metal bonding strengthrestrict the fabrication technique to obtain HAP and other calcium phosphate ceramic coatings. In thispaper a bioceramic composite coating, which includes HAP andβ-Ca2P2O7, was obtained by lasercladding with pre-depositing mixed powders of CaHPO4·2H2O and CaCO3 directly on the 316Lstainless steel metal substrate. The phases, microstructure and bonding feature of the bioceramiccomposite coating are characterized by X-ray diffraction(XRD), scanning electronmicroscopy-energy dispersive spectroscopy(SEM-EDS). The microstructure of the coating consistsof minute granular HAP that is distributed among the overlapped club-shapedβ-Ca2P2O7. Uniformpresences of Ca, P and O in bioceramic composite coating supplie necessary elements for thesynthesis of HAP andβ-Ca2P2O7. Diffusions inwards of P and O into alloying layer help form thechemical metallurgical bonding and composition gradient distributions are present. a chemicalmetallurgical bonding was formed between the bioceramic composite coating and metal substrate
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.361-363.697.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Consecutive evaluation of immunoglobulin M and G antibodies against hepatitis E virus (1996)
    Springer
    Journal of gastroenterology 31 (1996), S. 818-822 
    Details
    ISSN: 1435-5922
    Keywords: hepatitis E virus ; IgM and IgG anti-HEV ; ELISA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Hepatitis E virus (HEV) infection is sporadic in the Guangzhou city southern China. However, the evaluation of antibodies to HEV during consecutive time periods after infection has not been reported. We utilized enzyme immunosorbent assay (ELISA) to detect IgM and IgG anti-HEV in consecutive serum specimens from patients with acute hepatitis E and compared that data with detection rates of IgM and IgG anti-HAV in patients with acute hepatitis A. IgM anti-HEV can be detected as early as 4 days after onset of disease symptoms in some patients. The detection rate of IgM anti-HEV is significantly higher in specimens collected within 4 weeks (95%) of onset than in those specimens collected 4 to 18 weeks after onset (67.6%) (P〈0.005). IgM anti-HEV had a similar pattern to IgM anti-HAV and can be used as a marker of acute HEV infection. In contrast with IgG anti-HAV, 56.8% of the specimens did not contain detectable levels of IgG anti-HEV (P〈0.005). One should be cautioned against making a diagnosis of HEV infection solely by the currently available assays for IgG anti-HEV. In conclusion, IgM anti-HEV can be used as a reliable and sensitive marker for recent HEV infection, but serum specimens should be collected within 4 weeks after onset of symptoms to avoid false-negative results. In contrast, we should be aware of the failure to develop IgG anti-HEV in some patients. These patients carry the risk of reinfection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02358608
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  • 10
    Electronic Resource
    Electronic Resource
    Some observations on wetting in the Bi2O3-ZnO system (1994)
    Springer
    Journal of materials science 13 (1994), S. 400-403 
    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/10.1007/BF00278009
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