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  • Trans Tech Publications, Ltd.  (2,347)
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  • Trans Tech Publications, Ltd.  (2,347)
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  • 1
    Online Resource
    Online Resource
    Preparation and Characterization of n-HA/PA66/CS Biocomposite
    Trans Tech Publications, Ltd. ; 2007
    In:  Key Engineering Materials Vol. 330-332 ( 2007-2), p. 463-466
    Details
    In: Key Engineering Materials, Trans Tech Publications, Ltd., Vol. 330-332 ( 2007-2), p. 463-466
    Abstract: Nano-hydroxyapatite/polyamide66/chitosan composite (n-HA/PA66/CS) was prepared by a co-precipitation method, and was characterized by TG/DTG, TEM, IR, XRD and Universal mechanical testing machine. TEM test showed that some rod like crystals were formed and distributed uniformly into polymer matrix, with a size of about Φ30nm×80nm. IR and XRD analysis showed that some chemical bonds and electrostatic interaction existed between n-HA and polymers. TG/DTG curves indicated that the composites possessed a talent of high heat-resistance. The compressive strength of composite changed with different content of three compounds, the maximum compressive strength of composite (70MPa) could be acquired.
    Type of Medium: Online Resource
    ISSN: 1662-9795
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/KEM.330-332
    DOI: 10.4028/www.scientific.net/KEM.330-332.463
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2007
    detail.hit.zdb_id: 2073306-9
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  • 2
    Online Resource
    Online Resource
    Dressing of Monolayer Brazed Diamond Wheel for Grinding Li-Ti Ferrite
    Trans Tech Publications, Ltd. ; 2010
    In:  Advanced Materials Research Vol. 126-128 ( 2010-8), p. 995-1000
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 126-128 ( 2010-8), p. 995-1000
    Abstract: The monolayer brazed diamond tools have recently been used increasingly in hard-brittle materials grinding because of their excellent grinding performances as long tool life, high material removal rate and large inter-grit chip space, etc. However, they possess an inherent shortcoming of the high roughness of the grinding surface. This work is an attempt to reduce the over-protruded grits of the monolayer brazed diamond wheel so that precision grinding operations can be executed effectively. In this investigation, the monolayer brazed diamond wheels with regular distribution pattern of grit have been dressed by a special conditioning process and used in precision grinding experiments on Li-Ti ferrite. The outcome of this attempt appeared highly encouraging. A substantial improvement of the ground surface roughness could be achieved with the dressed monolayer brazed diamond wheels.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.126-128
    DOI: 10.4028/www.scientific.net/AMR.126-128.995
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2010
    detail.hit.zdb_id: 2265002-7
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  • 3
    Online Resource
    Online Resource
    Preparation of CuO-CoO-MnO/SiO〈sub〉2 〈/sub〉Nanocomposite Aerogels and the Effect of Synthesis Conditions on Gelation
    Trans Tech Publications, Ltd. ; 2010
    In:  Advanced Materials Research Vol. 148-149 ( 2010-10), p. 920-923
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 148-149 ( 2010-10), p. 920-923
    Abstract: CuO-CoO-MnO/SiO2 nanocomposite aerogels were prepared by using tetraethyl orthosilicate (TEOS) as Si source, and aqueous solution of Cu, Co and Mn acetates as transition metal sources via sol-gel process and supercritical drying (SCD) technique. The effect of synthesis conditions on gelation was investigated. The composition of the nanocomposite aerogels was characterized by electron dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). The specific surface area of the nanocomposite aerogels was determined by the Brunauer-Emmett-Teller (BET) method. The results show that the range of optimal temperature for gelation is 30-45 °C, and the pH is 3.0-4.5. CuO-CoO-MnO/SiO2 nanocomposite aerogels are porous with a specific surface area of 384.9-700.6 m2/g. Compared to CO2 SCD, ethanol SCD is even favorable to the formation of aerogel with high specific surface area. The transition metals content in the nanocomposite aerogels can be controlled to be 0.71-13.77 at.%.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.148-149
    DOI: 10.4028/www.scientific.net/AMR.148-149.920
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2010
    detail.hit.zdb_id: 2265002-7
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  • 4
    Online Resource
    Online Resource
    Discussion on Control of Hazardous Materials in Ship Recycling Activities
    Trans Tech Publications, Ltd. ; 2012
    In:  Advanced Materials Research Vol. 476-478 ( 2012-2), p. 1674-1677
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 476-478 ( 2012-2), p. 1674-1677
    Abstract: Almost all obsolete vessels contain hazardous materials, which may affect environment and health of workers and will be handed over to registered waste management facility for further treatment and disposal. How to control these hazardous materials and wastes has become one important issue. In this paper, the category, application, location and effect of the hazardous materials onboard were presented. Then, the current status of worldwide major ship recycling yards was analyzed. Finally, the related international conventions and standards were introduced. As we all know, ship recycling operations are often carried out in developing countries, especially in Asia, due to low cost and imperfect regulations. We believe that Chinese ship-breaking companies with the positive response to Hong Kong Convention and the improvement of the management regulation, facilities, operation condition and labor protection, will get the favor of various international ship-owners.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.476-478
    DOI: 10.4028/www.scientific.net/AMR.476-478.1674
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2012
    detail.hit.zdb_id: 2265002-7
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  • 5
    Online Resource
    Online Resource
    Antimicrobial Activity of Compound Traditional Chinese Medicine Feizhu Powder
    Trans Tech Publications, Ltd. ; 2013
    In:  Advanced Materials Research Vol. 781-784 ( 2013-9), p. 1064-1067
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 781-784 ( 2013-9), p. 1064-1067
    Abstract: Feizhu powder, which is a classical Chinese medicine prescription collected in the Chinese Veterinary Pharmacopoeia, comprises four kinds of Chinese herbs: Rhizoma dryopteridis crassirhizomatis, Radix polygoni multiflori (prepared), Fructus hordei germinatus and Soybean (fry). According to dose proportion in the prescription and preparation method collected in the Chinese Veterinary Pharmacopoeia, we have prepared the Feizhu powder. In order to research the antibacterial activity in vitro of homemade Feizhu powder, it was extracted with 95% ethanol and water, respectively. Then minimum inhibitory concentration (MIC) of the extract was detected against Streptococcus suis, Staphylococcus aureus and Escherichia coli by micro porous-plate method. The results showed that MICs of Feizhu powder water extract ranged from 250 mg/mL to 500 mg/mL. While MICs of Feizhu powder alcohol extract ranged from 31.25 mg/mL to 62.5 mg/mL. The test data indicated that antimicrobial activity of Feizhu powder alcohol extract is superior to that of water extract, this lay the foundation for the extract of the antibacterial active ingredients and further research on Feizhu powder.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.781-784
    DOI: 10.4028/www.scientific.net/AMR.781-784.1064
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2013
    detail.hit.zdb_id: 2265002-7
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  • 6
    Online Resource
    Online Resource
    Numerical Study on Influence of Joint Characters on Rock Mechanical Parameters
    Trans Tech Publications, Ltd. ; 2011
    In:  Advanced Materials Research Vol. 201-203 ( 2011-2), p. 2909-2912
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 201-203 ( 2011-2), p. 2909-2912
    Abstract: Rock mass is the syntheses composed of kinds of structure and structured surfaces. The joint characters is influencing and controlling the rock mass strength, deformation characteristics and rock mass engineering instability failure in a great degree. Through using the RFPA2D software, which is a kind of material failure process analysis numerical methods based on finite element stress analysis and statistical damage theory, the uniaxial compression tests on numerical model are carried, the impact of the trace length of rock joints and the fault throws on rock mechanics parameters are studied. The results showed that with the gradual increase of trace length,compression strength decreased gradually and its rate of variation getting smaller and smaller, the deformation modulus decreased but the rate of variation larger and larger; with the fault throws increasing, the compression strength first increases and then decreases, when the fault throw is equal to the trace length, the deformation modulus is the largest. When the joint trace length is less than the fault throw, the rate of the deformation modulus is greater than that of trace length, but the deformation modulus was not of regular change.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.201-203
    DOI: 10.4028/www.scientific.net/AMR.201-203.2909
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2011
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  • 7
    Online Resource
    Online Resource
    Model Reconstruction of Engine Case Based on MBD
    Trans Tech Publications, Ltd. ; 2012
    In:  Applied Mechanics and Materials Vol. 271-272 ( 2012-12), p. 1351-1355
    Details
    In: Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 271-272 ( 2012-12), p. 1351-1355
    Abstract: 3D CAPP has become trend. Based on recognition of manufacturing features, the design model is reconstructed. First, the features of the engine case are classified. The workflow of reconstruction is put forward. Then, the detail ways to identifying manufacturing features are illuminated, and the functions are listed. The design model is reconstructed by redefining geometric and no-geometric information, including surfaces, holes, slots, text, sizes, and so on. The model of the engine case is reconstructed in the developed system.
    Type of Medium: Online Resource
    ISSN: 1662-7482
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMM.271-272
    DOI: 10.4028/www.scientific.net/AMM.271-272.1351
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2012
    detail.hit.zdb_id: 2251882-4
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  • 8
    Online Resource
    Online Resource
    Porous Metal Bond Matrix with High Porosity and Large Pore Size Fabricated Using Pore-Forming Agent
    Trans Tech Publications, Ltd. ; 2009
    In:  Key Engineering Materials Vol. 416 ( 2009-9), p. 279-283
    Details
    In: Key Engineering Materials, Trans Tech Publications, Ltd., Vol. 416 ( 2009-9), p. 279-283
    Abstract: In order to improve the machining performance of the new type porous metal bond wheel, a new attempt were carried out for fabricating porous metal bond matrix with adjustable and high porosity as well as large pore size by use of pore-forming agent ammonium bicarbonate (NH4HCO3) and a vacuum loose powder sintering process. The porosity, bending strength and microstructure of the as-sintered porous metal bond matrix have been studied. The results show that the pore-forming agent NH4HCO3 with a certain amount can effectively increase porosity and pore size. The porosity of the fabricated porous metal bond matrix increases linearly with addition of ammonium bicarbonate and reaches as high as 67.7%, while the size of pores is larger than 300 μm. Meanwhile, the use of the raw materials were given and the sintering mechanism was discussed.
    Type of Medium: Online Resource
    ISSN: 1662-9795
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/KEM.416
    DOI: 10.4028/www.scientific.net/KEM.416.279
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2009
    detail.hit.zdb_id: 2073306-9
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  • 9
    Online Resource
    Online Resource
    Treatment of Simulated Ballast Water Using Combined Photocatalysis and Ozonation Process
    Trans Tech Publications, Ltd. ; 2013
    In:  Advanced Materials Research Vol. 864-867 ( 2013-12), p. 1478-1481
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 864-867 ( 2013-12), p. 1478-1481
    Abstract: The combined photocatalysis and ozonation (UV/Ag-TiO 2 +O 3 ) process has been investigated for its potential use for ballast water treatment by using Dunaliella salina ( D. salina ) as an indicator microorganism. Inactivation curves were obtained, and the mechanism was studied. Compared to individual unit processes, the combined UV/Ag-TiO 2 +O 3 tests yield enhanced inactivation efficiency. Scanning electron microscopy (SEM) measurements showed that presence of O 3 during UV/Ag-TiO 2 exposure expedited the destruction of cell structure, which was further confirmed by the formation of malondialdehyde (MDA) and decrease in chlorophyll-a (chl-a) concentration. The results suggest that UV/Ag-TiO 2 +O 3 was efficient for inactivation of D. salina in simulated ballast water, and the accelerated destruction of cell structure was an important reason for the enhanced inactivation efficiency.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.864-867
    DOI: 10.4028/www.scientific.net/AMR.864-867.1478
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2013
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  • 10
    Online Resource
    Online Resource
    Machining Performance on Multi-Layer Brazed Diamond Tools
    Trans Tech Publications, Ltd. ; 2009
    In:  Key Engineering Materials Vol. 416 ( 2009-9), p. 598-602
    Details
    In: Key Engineering Materials, Trans Tech Publications, Ltd., Vol. 416 ( 2009-9), p. 598-602
    Abstract: An attempt has been made to investigate the new generational manufacturing technology for multi-layer diamond tools by brazing. A kind of new multi-layer brazed diamond core drills with random grains distribution was made by mixing diamond particles with brazing alloy powders. And a preliminary machining performance experiment was carried out through drilling granite. The testing results show the typical topography of the multi-layer brazed diamond core drills after drilling granite, just like that of multi-layer sintered ones, is that diamond grits drag long tails. Different from multi-layer sintered diamond core drills, no grit pull-outs can be seen during the whole drilling process because of chemical metallurgical effect between diamond grit and brazing alloy, the same as monolayer brazed diamond core drills. The main drawback to this kind of multi-layer brazed diamond tools is each individual particle is not subjected to the same drilling force throughout the drilling operation because of random grain distribution. This leads to premature fracture of the leading particles. Similarly, because large gaps between particles exist, the bond is being exposed to the workpiece, which leads to erosion of the bond. The overall performance is lower tool lives and slower drilling speeds. Therefore, ideally, diamond particles should be evenly distributed throughout the bond, which means they are all subject to the same drilling forces and the multi-layer brazed diamond tool is operated at its optimum efficiency.
    Type of Medium: Online Resource
    ISSN: 1662-9795
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/KEM.416
    DOI: 10.4028/www.scientific.net/KEM.416.598
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2009
    detail.hit.zdb_id: 2073306-9
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