نتایج جستجو برای: n coating

تعداد نتایج: 1011284  

Journal: :Journal of the Royal Society, Interface 2012
Di Huang Yi Zuo Jidong Li Qin Zou Li Zhang Mei Gong Li Wang Limei Li Yubao Li

Tightly bonding of bioactive coating is the first crucial need for orthopaedic implants. This study describes a novel and convenient technique to prepare bioactive coating with high adhesion on orthopaedic substitutes made of polymeric matrix. Here, a chemical corrosion method has been adopted to fabricate a coating on the surface of injection-moulded polyamide66 (PA66) substrates by corrosive ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - پژوهشگاه مواد و انرژی - پژوهشکده سرامیک 1392

thermal barrier coatings (tbcs) are used to provide thermal insulation to the hot section components of gas turbines in order to enhance the operating temperature and turbine efficiency. hot corrosion and thermal shocks are the main destructive factors in tbcs which comes as a result of oxygen and molten salt diffusion into the coating. in this thesis atmospheric plasma spraying was used to dep...

Journal: :journal of dental research, dental clinics, dental prospects 0
ahmad behroozian assistant professor, department of orthodontics,dental school, tabriz university of medical sciences,iran mojgan kachoei associate professor, department of orthodontics,dental school, tabriz university of medical sciences,iran masumeh khatamian professor ,inorganic chemistry department, faculty of chemistry, university of tabriz baharak divband post hoc researcher,research center for pharmaceutical nanotechnology, tabriz university of medical sciences

introduction: any decrease in friction between orthodontic wire and bracket can accelerate tooth movement in the sliding technique and result in better control of anchorage. the present study was carried out to decrease this friction by coating of zinc oxide nanoparticles (zno) on orthodontic wires and porcelain brackets. materials and methods: in this in vitro study, a combination of 120 0.019...

2016
Jian Cheng Jiang Xu Lin Lin Liu Shuyun Jiang

In order to improve the corrosion and wear resistance of biomedical Ti-6Al-4V implants, a Ta₂N nanoceramic coating was synthesized on a Ti-6Al-4V substrate by the double glow discharge plasma process. The Ta₂N coating, composed of fine nanocrystals, with an average grain size of 12.8 nm, improved the surface hardness of Ti-6Al-4V and showed good contact damage tolerance and good adhesion streng...

Journal: :IACR Cryptology ePrint Archive 2006
Boris Skoric Stefan Maubach Tom A. M. Kevenaar Pim Tuyls

Physical Uncloneable Functions (PUFs) can be used as a cost-e ective means to store cryptographic key material in an uncloneable way. In coating PUFs, keys are generated from capacitance measurements of a coating containing many randomly distributed particles with di erent dielectric constants. We introduce a physical model of coating PUFs by simplifying the capacitance sensors to a parallel pl...

2016
Bekir Sami Yilbas Billel Salhi Muhammad Rizwan Yousaf Fahad Al-Sulaiman Haider Ali Nasser Al-Aqeeli

In this study, nanowires/nanowalls were generated on a silicon wafer through a chemical etching method. Octadecyltrichlorosilane (OTS) was deposited onto the nanowire/nanowall surfaces to alter their hydrophobicity. The hydrophobic characteristics of the surfaces were further modified via a 1.5-μm-thick layer of n-octadecane coating on the OTS-deposited surface. The hydrophobic characteristics ...

Journal: :Science and technology of advanced materials 2008
Shi Hong Zhang Ming Xi Li Jae Hong Yoon Tong Yul Cho Yi Zhu He Chan Gyu Lee

Micron-size Ni-base alloy (NBA) powders were mixed with both 1.5 wt.% (hereinafter %) micron-size CeO2 (m-CeO2) and also 1.5% and 3.0% nano-size CeO2 (n- CeO2) powders. These mixtures were coated on low-carbon steel (Q235) by 2.0 kW CO2 laser cladding. The effects on the microstructures, phases and electrochemical corrosion of the coatings upon the addition of m- and n- CeO2 powders to NBA (m- ...

2018
Zhang Jing Kong Dejun

A cold sprayed Al coating on S355 structural steel was processed using a laser remelting (LR). The surface and cross-section morphologies, chemical compositions, and phases of as-obtained Al coating before and after LR were analyzed using a scanning electronic microscope (SEM), energy dispersive spectrometer (EDS), and X-ray diffractometer (XRD), respectively, and their hardness was measured us...

Journal: :Journal of the mechanical behavior of biomedical materials 2011
Bharat Panjwani Nalam Satyanarayana Sujeet K Sinha

Ultra-high molecular weight polyethylene (UHMWPE) thin film was coated onto Ti6Al4V alloy specimens using dip coating method. Tribological performance of this coating (thickness of 19.6 ± 2.0 μm) was evaluated using 4 mm diameter Si(3)N(4) ball counterface in a ball-on-disk tribometer. Tests were carried out for different normal loads (0.5, 1.0, 2.0 and 4.0 N) and rotational speeds of the disk ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - پژوهشکده فنی و مهندسی 1388

asymmetric polyethersulfone (pes) microfiltration flat sheet membranes were composed by the phase inversion method (pim) and were used as supports. composite membranes were fabricated by coating silicone rubber as selective layer. effect of different concentrations of pes and pdms and different solvent such as nmp, dmf and dms effects as pes solvents and support thickness and different coagulat...

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