Structure and magnetotransport properties of Fe3O4–SiO2 composite films reactively sputtered at room temperature

2004 ◽  
Vol 95 (10) ◽  
pp. 5661-5665 ◽  
Author(s):  
Hui Liu ◽  
E. Y. Jiang ◽  
H. L. Bai ◽  
R. K. Zheng
Keyword(s):  
Room Temperature ◽  
Composite Films

One step room temperature photodeposition of Cu/TiO2 composite films and its conversion to CuO/TiO2

2009 ◽  
Vol 517 (19) ◽  
pp. 5621-5624 ◽  
Author(s):  
Eilidh Morrison ◽  
David Gutiérrez-Tauste ◽  
Concepción Domingo ◽  
Elena Vigil ◽  
José A. Ayllón
Keyword(s):  
Room Temperature ◽  
Composite Films ◽  
One Step

Fabrication and Morphological Characterization of Barium Titanate-Based Polymeric Nanocomposite Thin Films

2018 ◽  
pp. 50-59 ◽  
Author(s):  
Sudhanshu Singh ◽  
Umesh Kumar Dwivedi
Keyword(s):  
Barium Titanate ◽  
Room Temperature ◽  
Composite Films ◽  
Morphological Characterization ◽  
Solution Casting ◽  
Weight Percentage ◽  
Casting Technique ◽  
Nanocomposite Thin Films ◽  
Solution Casting Technique

In this critical review chapter, the authors explain the development of composite films of Barium Titanate (BaTiO3) and Poly (methyl methacrylate) prepared by solution casting technique. Different weight percentage composition of BaTiO3 has been selected to find out the best optimization condition for further investigation and correlate the results. The structural properties have been carried out at room temperature using XRD. Efforts have been made to correlate the results with investigated XRD results of pure BaTiO3 and its composites as observed by other workers at room temperature. The flow of experimental work and microscopic images are explained.

Vapor Deposition of Composite Organic-Inorganic Films

2005 ◽  
Author(s):  
B. Kobrin ◽  
J. Chin ◽  
W. R. Ashurst
Keyword(s):  
Vapor Deposition ◽  
Room Temperature ◽  
Surface Coverage ◽  
Composite Coatings ◽  
Composite Films ◽  
Deposition Process ◽  
Deposition Method ◽  
Self Assembled Monolayer ◽  
Process Sequence ◽  
Inorganic Films

Results on the thermal and immersion stability of ultra-thin composite films created by a deposition method call MVD™ (Molecular Vapor Deposition [1]) are reported. It is observed that these composite films were denser and more stable in thermal and immersion applications when compared to traditional self-assembled monolayer (SAM) films. These improved films were created by a special “sequential” or “layered” deposition process sequence. The MVD™ composite coatings can be deposited at room temperature on a variety of materials such as polymers, fibers, metals, alloys and other materials which normally do not allow films to form with complete surface coverage.

Growth of BaTiO3–Ag hybrid composite films at room temperature by aerosol deposition

2012 ◽  
Vol 22 ◽  
pp. s735-s739 ◽  
Author(s):  
Young Joon YOON ◽  
Sung Hwan CHO ◽  
Jihoon KIM ◽  
Hyo Tae KIM ◽  
Hong Koo BAIK ◽  
...  
Keyword(s):  
Hybrid Composite ◽  
Room Temperature ◽  
Composite Films ◽  
Aerosol Deposition

Preparation of WS2/MoS2/C Composite Films and their Tribological Properties

2009 ◽  
Vol 79-82 ◽  
pp. 711-714
Author(s):  
Lei Zhou ◽  
Gui Lin Yin ◽  
Yu Dong Wang ◽  
Zhen Yu ◽  
Dan Nong He
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Room Temperature ◽  
Composite Films ◽  
Tribological Performance ◽  
Atmospheric Conditions ◽  
Composite Target ◽  
Mos2 Film ◽  
Order Of Magnitude ◽  
The Relationship

WS2/MoS2/C composite lubricating films were prepared in an Ar/C2H2 atmosphere by magnetron reaction-sputtering using a WS2/MoS2 composite target. The relationship between the microstructure and the tribological performance of the films was investigated. The composite film has a compact microstructure, which is shown to have much superior tribological performance with lower friction coefficient and better wear resistance than pure MoS2 film in humid atmospheric conditions at room temperature. An increase in hardness of nearly one order of magnitude was reached, too.

Preparation and Properties of the Novel Nanocrystal and Polymer Composite Films for Electro-Optic Applications

2003 ◽  
Vol 785 ◽  
Author(s):  
Quan Ren ◽  
Dong Xu ◽  
Yuktak Chow ◽  
Hauping Chan ◽  
Paklim Chu
Keyword(s):  
Thin Films ◽  
Glass Transition ◽  
Polymer Composite ◽  
Room Temperature ◽  
Composite Films ◽  
Polymer System ◽  
Weight Ratio ◽  
Composite Thin Films ◽  
Coupling System ◽  
Electro Optic

ABSTRACTNovel nanocrystals and polymer composite thin films for the applications of electro-optical devices were prepared. We used PbTiO3 nanocrystals as a nonlinear chromophore (guest) in the NLO polymer system. The transparent polymer polyetherketone (PEK-c) was chosen as the polymer host due to its high glass transition temperature. The PbTiO3 nanocrystals were synthesized successfully by the chemical solution decomposition method. The size of the PbTiO3 nanocrystals was estimated to be 30–40 nm. The weight ratio of PbTiO3 nanocrystals to polymer polyetherketone was 15 %. The composite thin films of PbTiO3 / PEK-c were prepared by spin-coating technique. The films were then electrically poled to induce asymmetry in the material by heating the films to a temperature close to their glass transition and applying an electric field. The refractive indices of the un-poled composite PbTiO3 / PEK-c film were found to be 1.55165 for 633 nm and 1.65352 for 414 nm by using the Metricon prism coupling system. In the poled composite PbTiO3 / PEK-c film sample, the TE- and TM-indices differences were found to be 0.02945 for 633 nm and 0.03915 for 414 nm, showing very good optical anisotropy properties. Dielectric constant ε of the film was determined to be 7.32 at room temperature at 100 KHz using an Impedance Analyzer. The electro-optic coefficient, γ33, of poled PbTiO3 / PEK-c composite film was measured to be 18.34 pm/Vat 633 nm under room temperature by the simple transmission technique. The factor F2 = n7 γ2 /ε, figures of merit, was estimated to be 1546. The relaxation time constant was calculated to be 5836 min.

Characterization of pulsed laser deposited PbO/MoS2 by transmission electron microscopy

1994 ◽  
Vol 9 (1) ◽  
pp. 236-245 ◽  
Author(s):  
S.D. Walck ◽  
M.S. Donley ◽  
J.S. Zabinski ◽  
V.J. Dyhouse
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Sodium Chloride ◽  
Room Temperature ◽  
Film Growth ◽  
Composite Films ◽  
Pulsed Laser ◽  
Two Phase ◽  
Transmission Electron ◽  
20 Nm

Films of PbO/MoS2, grown by pulsed laser deposition, exhibit a significant improvement in tribological performance compared to MoS2 films grown by the same process. The microstructure and crystallography of PbO/MoS2 composite films were investigated using transmission electron microscopy (TEM) to identify the features responsible for this tribological improvement. Self-supporting samples were prepared from pulsed laser deposited, PbO/MoS2 thin films grown on single crystal sodium chloride substrates. Films deposited at room temperature exhibited a two-phase microstructure with one of the phases being amorphous. X-ray microanalysis results showed that the crystalline phase had significantly higher concentration ratios of Mo/Pb, Mo/S, and Pb/S than did the amorphous phase. Films grown at 300 °C were polycrystalline, with a grain size of about 20 nm, and had a NaCl type structure which was isomorphous to PbS. The grains had rectangular shape, and exhibited preferred orientation with the sodium chloride substrate. The concentration of S for these films was approximately 80% of the S concentration for films grown at room temperature. Both the high temperature and room temperature films had S concentrations which were higher than expected from the MoS2 in the target; this was attributed to gettering of the S in the vacuum chamber by Pb. The electron diffraction results, together with previously published results, suggest that the crystal structure of the phases in these films is not responsible for the improvement in tribological properties. However, the microstructural components formed during film growth do determine the wear-induced chemical reaction pathways.

Friction/Wear Behaviors of Magnetron Sputtered TiB2-C Composite Films on Ti6Al4V Alloy Substrate

2011 ◽  
Vol 189-193 ◽  
pp. 979-982
Author(s):  
Xiao Jing Xu ◽  
Xin Lan Sheng ◽  
Dan Chen ◽  
Xi Ling Xin ◽  
Kun Tian ◽  
...  
Keyword(s):  
Room Temperature ◽  
Composite Films ◽  
Ti6al4v Alloy ◽  
Wear Properties ◽  
Microstructural Characteristics ◽  
Carbon Doped ◽  
Alloy Substrate ◽  
Sic Films ◽  
Ball On Disc

The microstructure and friction/wear properties of TiB2-C (carbon-doped TiB2) films in TiB2-C/SiC double layer films (SiC films as interlayer) deposited on Ti6Al4V alloy substrate using magnetron sputtering technique at room temperature were investigated. The results show that the TiB2-C films exhibited the microstructural characteristics with nano-scale particles (domains), and the doped-carbon presented in manner of sp3 C-C and sp2 C-C bonds i.e. DLC (diamond-like carbon). The interface between the substrate and the SiC films and the interface between the SiC films and the TiB2-C composite films both showed good adhesion, with obvious element diffusions. As sliding against Si3N4 (silicon nitride) balls (2 mm in radius) using ball-on-disc type wear tester at room temperature under Kokubo simulation body fluid (SBF) and 50g load, the TiB2 -C composite films exhibited the friction coefficient of about 0.14 and the specific wear rate of 10.710-6 mm3 m−1 N−1. It is believed that the superior friction properties of the TiB2-C films are due to the role of the doped-carbon.

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