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  • 1
    Electronic Resource
    Electronic Resource
    The Processing of Anti-Rust Boronizing Layer on Steel Surface (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 353-358 (Sept. 2007), p. 1822-1825 
    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: This paper dealt with the processing of anti-rust boronizing layer on steel surface andphosphating as post-treatment to improve the corrosion resistance of the boronized layer. A smoothprotective layer with black brightness on the surface of the boronizing layer was obtained. Theappearance of the boronized work pieces was greatly improved. The technical parameters of theblack phosphating solution were optimized by the experiments and the microstructure and theinoxidizability of the black phosphated coating was also analyzed
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.1822.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Some Crystallographic Features of the Boron-Doped Diamond Single Crystals Synthesized by Fe-Ni-C-B System under HTHP (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 353-358 (Sept. 2007), p. 1370-1373 
    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: Boron-doped diamond single crystals were synthesized with Fe-Ni-C-B System catalystswhich content of boron carbide (B4C) were different, and their crystallographic features were testedwith electron probe microanalysis (EPMA), X-rays diffraction (XRD), Raman spectrum and fieldemission scanning electron microscopy (FESEM). The experimental results showed that dopedboron in the diamond could result in the changes of its crystallographic features. There weredifferent X-ray peak intensities in the different boron-doped diamond crystals, and the intensitieswere changed with the content of B4C in the catalysts. With the increase of boron content in thediamond, the boron atoms resulted in the change of growing rate in different crystalline face of thediamond. The quality of diamond synthesized with catalyst which contained 0.2 w.t.% boroncarbide was worse than others
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.1370.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Processing of Environment Protective Phosphating and its Coating Properties (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 353-358 (Sept. 2007), p. 1846-1849 
    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: This paper dealt with an environment protective phosphating with hydroxylaminesulphate as main accelerant. There were no nickel ion, nitrite, benzene and other harmful substancesin the phosphated coatings. The structure, component and properties of the coatings were analyzed.The phosphating process and its influence on powder, electrophoresis and heavy anti-erosioncoatings were also studied. The results showed that this processing had some virtues, all of theprocessing was carried out at room temperature; the phosphated coating was fine and the servicelife of the phosphating solution is longer. And also the phosphated coating had good properties
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.1846.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Effects of Temperature and Concentration on the Nano-Sized Hydroxyapatite Whisker Prepared by Chemical Precipitation Method (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 353-358 (Sept. 2007), p. 2191-2194 
    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: Chemical precipitation is a popular method for the preparation of hydroxyapatite(Ca10(PO4)6 (OH)2, HA) because of its simple operation. In this work, nano-sized HA whiskers weresynthesized at various synthetic temperatures and concentration by chemical precipitation with Ca(NO3) 2·4H2O and (NH4) 2HPO4 as raw materials. Heat treatment was carried out after they weresynthesized. The HA powders were analyzed by using X-ray diffraction (XRD), transmissionelectron microscope (TEM) and strength test in order to find the favorable growing condition forHA whiskers. The results show that the HA prepared at different synthetic temperatures show noimpurity diffraction peak, indicating that they have a high purity. Prior to heat treatment, thecrystallinity and length/diameter ratio of the HA whiskers become larger with the increasing ofsynthetic temperature. So a higher synthetic temperature can promote the growth of the HAwhiskers. There is no obvious difference in crystallinity after the heat treatment. Besides, a lowerreaction concentration can also promote the growth of HA whiskers. The strength test results showthat the compressive strength of the HA prepared gets a maximum value at 50°C
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.2191.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Analysis of Valence Electron Theory on the Catalytic Mechanism of Diamond Single Crystal Growth (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 353-358 (Sept. 2007), p. 2998-3001 
    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: Large numbers of experimental results show that carbides Me3C (Me means Fe, Ni, Co,Mn) are the primary carbon source to form diamond structure under the high temperature and highpressure (HPHT). In this paper, based on the empirical electron theory of solids and molecules (EET),the valence electron structure (VES) and interface structure factors of diamond and various carbidesare calculated, and the boundary condition of electron movement in the improved Thomas-Fermi-Dirac theory by Cheng (TFDC) is applied to the carbide/diamond interfaces. It is found that theelectron density of crystal plane in Me3C formed by C-C bonds is continuous with that in diamond atthe first order of approximation. Compared with Ni-based carbides [Ni3C, (NiMn)3C)], the electrondensity difference of Fe-based carbides [Fe3C, (FeNi)3C, (FeMn)3C]/diamond interfaces is lower, andthat of (FeNi)3C/diamond interface is minimum. The results show that the energy needed to transformcarbon atomic groups into diamond structure is lower for Fe-based carbides than Ni-based carbides
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.2998.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Bioactivity, Wear and Corrosion Resistant Properties of Rare Earth/Calcium Phosphate Composite Coatings (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 368-372 (Feb. 2008), p. 1194-1197 
    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: Rare earth/calcium phosphate composite coatings were fabricated on the surface of Ti-6Al-4Vby micro-arc oxidation (MAO) technique. The wear properties and corrosion resistant of rare earth/calcium phosphate composite coatings in the simulated body fluid (SBF) have been investigated and thebioactivity of the composite coatings were evaluated. The results show that the friction coefficient of thecomposite coatings in the SBF is only 0.15~0.18 and the anode polarization potential of the coating hasbeen obviously enhanced about 0.18V compared with that of coatings of calcium phosphate coatings. Sothe composite coatings have excellent wear and corrosion resistant properties. XRD analysis indicatesthat the composite coatings can induce hydroxyapatite to form on its surface after soaked in SBF for 9d,which shows that the composite coatings own good bioactivity
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.1194.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Bioactive and Stability of Calcium Phosphate-Polypyrrole Composite Coatings by Electrochemical Deposition (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 368-372 (Feb. 2008), p. 1198-1200 
    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: This study examined the bioactive and stability of calcium phosphate- polypyrrole(ppy)composite coatings on titanium alloys by electrochemically deposition in simulated body fluid (SBF).Change of coatings mass and SBF pH during coatings soaked in SBF indicated that ppy reduces thedecomposition of coatings. The surface morphology of coatings characterized by SEM showed that thestability of composition coating was superior to that of single coating. XRD indicated that ppy inducesCO32- enter calcium phosphate coating, which showed that the composite coatings possess betterbioactive. Thus, this electrochemical deposition provides an effective method of ppy incorporation atphysiological temperature, which can offer excellent bioactive and stability of coatings, with a potentialfor sustained release of therapeutic agents as required for metallic implant fixation
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.1198.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Study on Porous Titanium Biomedical Materials (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 368-372 (Feb. 2008), p. 1212-1214 
    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 bioactivity of porous titanium is poor. Alkali treatment and heat treatment were used inporous titanium to induce apatite biocoatings on the surface of porous titanium and improve thebioactivity of porous titanium. The results indicate that grass-blade fibre Na2TiO3 and amorphous rutileform on alkali and heat treatment samples and (102) plane Ti disappeared. Octacalcium phosphate (OCP)and Hydroxyapatite (HA) were found on the surface of samples in simulation body fluid (SBF) for 2w.The intensity of OCP and HA increased with time of samples in vivo increased. Ti-OH formed on thesurface of the gel was explained by the point of view of negative and positive ion exchange. Themechanism of formation of OCP and HA induced by Na2TiO3 and TiO2 gel was studied
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.1212.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Hydroxyapatite Graded Coatings Made through Subsonic Thermal Spraying (2003)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 423-425 (May 2003), p. 327-330 
    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
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/07/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.423-425.327.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    The Carbon Source Analysis for Diamond Crystal Growth from Fe-C System at High Pressure-High Temperature (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 51 (June 2008), p. 141-147 
    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: Despite many studies have been carried, there is no clear understanding of the growthmechanism involved in the high-pressure and high-temperature (HPHT) diamond synthesis withmetal catalyst, especially the problem about carbon source. In this paper, the lattice constants ofdiamond, graphite and Fe3C at HPHT were calculated with the linear expansion coefficient and elasticconstant. Then based on the empirical electron theory of solids and molecules (EET), the valenceelectron structures of them and their common crystal planes were calculated, and the boundarycondition of electron movement in the Thomas-Fermi-Dirac theory modified by Cheng (TFDC) wasapplied to analyzing the electron density continuity of the interface. It was found that the relativeelectron density differences across graphite/diamond interfaces are great and discontinuous at the firstorder of approximation, while the relative electron density differences across Fe3C/diamondinterfaces were continuous. The results show that the carbon atom cluster is easier to decompose fromFe3C than from graphite and to transform into diamond structure, so the carbon source for diamondcrystal growth may come from the decomposition of Fe3C instead of graphite. Accordingly, thediamond growth mechanism was analyzed from the viewpoint of valence electron structure
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/41/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.51.141.pdf
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