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  • 1
    Electronic Resource
    Electronic Resource
    Fabrication and Properties of Hydroxyapatite-Ti Network Composites (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 41-42 (Apr. 2008), p. 41-48 
    Details
    ISSN: 1662-8985
    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 (HA) powder was synthesized by a sol-gel method with Ca(OH)2 andH3PO4 as reactants. The HA granules were then coated with TiH2 powder using a mechanicalmixing method. The HA-TiH2 material system produced HA-Ti composites after hot-pressing at1050ºC. The HA-Ti composites are mainly composed of HA and Ti, with small amounts of Ca2P2O7and Ca3(PO4)2 phases. Fracture toughness and bending strength are 2.4 MPa·m1/2 and 54.3 MPa,respectively for the HA-20vol%Ti composite, higher than those of the pure HA ceramic. Theimprovement in properties is because of the unique 3D network structure of Ti, which is an idealreinforcement structure for the weak and brittle HA. According to ISO/TR 7405-1984, hemolysistest was performed to evaluate the blood compatibility of the material. The results show that thehemolysis rate of the HA-20vol%Ti composite is 0.56%. Relative growth rates (RGR) of L-929cells soaked after 6 days in the HA-20vol%Ti group, pure Ti group, black group and pure Pb groupwere 132%, 100%, 90% and 6% respectively, while the level of cytotoxicity was grade 0 in HA-Ticomposite group. These results imply that the HA-20vol%Ti composite has good biocompatibilityand bioactivity
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.41-42.41.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Preparation of Open-Cell Alumina Ceramic Foam with Uniform Cell Structure Using Plant Seed Template (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 41-42 (Apr. 2008), p. 265-270 
    Details
    ISSN: 1662-8985
    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: Open-cell Al O ceramic foams with uniform cell structures and dense cell struts werefabricated by centrifugal slip casting using the plant seeds as the templates. The rheologicalcharacteristic of Al O slurries with up to 50 vol.% solid content was investigated. The shrinkagematching between the Al O green compact and the plant seeds during drying was studied. The effectof solid contents of slurries on change of green density of cell struts along the height of compacts wasanalyzed. The drying and sintering schedule of Al O green cakes were studied. The results indicatedmass segregation of Al O particles with different sizes during centrifugal process was negligible forslurries with high solid loadings with 50 vol. %. The cell struts of green bodies had high density of63.8% TD. After sintered at 1500 °C for 2 h, the final products had dense cell struts with high sintereddensity of 98.9%TD and homogeneous microstructure. The porosity and compressive strength ofsintered products was 66.5% and 5.26 MPa, respectively
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.41-42.265.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Fabrication of Transparent YAG Ceramics from Co-Precipitation Synthesized Nanopowders (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 41-42 (Apr. 2008), p. 271-276 
    Details
    ISSN: 1662-8985
    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: YAG nanopowders were synthesized by a co-precipitation method using ammoniumhydrocarbonate and ammonia water as the precipitants respectively. The influences of precipitantson chemical compositions, phase transformation and sinterability of the prepared powders, andtransmittance of the vacuum-sintered YAG ceramics were studied. The sinterability of powderssynthesized using ammonium hydrocarbonate as precipitant is better than that with ammonia water.Pure YAG phase can be obtained by calcining the hydrate precursor at 1200°C, while some impurityphases exist when calcining the carbonate precursor at the same temperature. Transparent YAGceramics were fabricated by vacuum sintering at 1700°C for 5 h using the YAG nanopowders, andtheir in-line transmittance is about 60% in the visible light range
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.41-42.271.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Surface Crystallization of ZnO-Al〈sub〉2〈/sub〉O〈sub〉3〈/sub〉-SiO〈sub〉2〈/sub〉 Glass (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 280-283 (Feb. 2007), p. 1655-1658 
    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: ZnO-Al2O3-SiO2 glasses with different surface conditions were surface crystallized by different heat treatment process. Differential thermal analysis (DTA), X-ray diffraction analysis (XRD) and scanning electronic microscope (SEM) were used to investigate the crystallization behavior of glasses, the crystalline components and microstructure of the as-got glass-ceramics.According to the DTA results, different heat treatment processes of surface crystallization on the glass were adopted. The SEM results show that surface conditions of glasses are important for the surface crystallization, and the thickness of surface crystalline layer increases with heat treatment time
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/49/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.280-283.1655.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Synthesis and Hydrogen Storage Capacity of SiC Nanotube (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 368-372 (Feb. 2008), p. 647-649 
    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: Hollow nanostructures have important applications in the field of gas adsorption, separationand storage due to their large specific surface areas. Silicon carbide nanotubes (SiCNTs) are one kind ofsuch materials. In this paper, SiCNTs were synthesized from multiwalled carbon nanotubes (MWCNTs)via chemical vapor reaction (CVR) and purification. The SiCNTs were characterized by XRD, SEM andTEM. The results revealed that C-SiC nanotubes were obtained after CVR and most carbon wereremoved after purification with some traces retained inside SiCNTs. Hydrogen storage capacitiesmeasurements indicated that SiCNTs are superior to MWCNTs
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.647.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    A Novel SiC Precursor with High Ceramic Yield: Antimony-Substituted Polysilane (APS) (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 368-372 (Feb. 2008), p. 818-820 
    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: A novel SiC precursor antimony-substituted polymethylsilane (APS) is present in this paper.First, pre-APS was synthesized from polymethylsilane (PMS) and SbCl3 at room temperature. Pre-APSwas a liquid mixture and could be used in PIP process without solvent. After the elemination of HCl andthe crosslinking of pre-APS, the novel precursor APS with the ceramic yield 91% was prepared
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.818.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Ceramic Coatings on Graphite via Polymer Vapor Pyrolysis Deposition Process (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 368-372 (Feb. 2008), p. 1297-1299 
    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: Silicon carbide coatings on graphite were prepared through polymer vapor pyrolysis depositionprocess (PVPD) under N2 atmosphere. During this process, some low molecular weight substances thatpolycarbosilane (PCS) pyrolyzed can be deposited on graphite, and they can convert into SiC in hightemperature. The results of XRD showed that amorphous SiC coatings were formed on graphite when thepyrolysis temperature was 1000°C, andβ-SiC phase formed in the coatings when the temperature up to1250°C. Effects of the coatings on the microstructure and properties were investigated. It was shown thatthe uniform dense SiC coatings could be obtained by carefully controlling the pyrolysis temperature andramping rate when the number molecular weight of PCS was in the range of 1,000~1,500
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.1297.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Effect of Heat Treatment on Specific Surface Area of Si-C-O Fibers (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 368-372 (Feb. 2008), p. 1639-1641 
    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 this paper, effect of heat treatment on the SSA of Si-C-O fibers was investigated andmorphologies of the treated fibers were studied using SEM. The results revealed that weight loss wasproportional to the treatment time at 1573K and the specific surface area (SSA) increased sharply whenthe weight loss reached above 6wt%. A rough and porous ceramic fiber with SSA of 23.76m2/g could beobtained at the weight loss of 9.1wt%, as a result of the treatment at 1573K for 32h
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.1639.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Anti-Seismic Behavior of Innovatory RC Frame Subjected to Severe Earthquake Action (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 400-402 (Oct. 2008), p. 713-718 
    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 anti-seismic behavior of RC frame with buckling restrained braces (BRBs) subjected to severe earthquake action in seismic region was investigated in this paper. A design process of the buckling restrained braces used for stiffness-deficiency concrete frame structures was given, the design of the buckling restrained braces was conducted for a common frame structure, the layout of these braces in it was given by taking an actual engineering for illustrations, and the static analysis and time-history dynamic analysis were also performed. The results of computation showed that the use of buckling restrained braces has led to several functional improvements, such as the increase in structure stiffness, reduction of story displacement, and improved energy dissipation ability when compared with the frame without such braces. Analysis results showed further that RC frame with BRBs could absorb and dissipate seismic energy more effectively, improving anti-seismic performance of the framed structure
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/58/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.400-402.713.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Effects of Oxygen Content on the Properties of Ultra-High-Temperature Resistant Si-Al-C Fibers (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 368-372 (Feb. 2008), p. 1774-1777 
    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: Ultra-high-temperature resistant Si-Al-C fibers derived from polyaluminocarbosilane wereprepared by the procedures of melt-spinning, air curing and heated at 1800°C. It was found that oxygencontent in the cured fibers has great influences on the chemical composition of the Si-Al-C fibers and itscrystalline behavior during sintering. When oxygen content of cured fibers was too high, crystallite grainsin the fiber would grow up. Oxygen evolvement in the fiber during the preparation was studied in detail bychemical analysis. It was found that oxygen is liberated mainly as CO gas from 1300°C to1600°C
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.1774.pdf
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