Composite Films of Copper / Boron Nitride and Nickel / Boron Nitride

1996 ◽  
Vol 451 ◽  
Author(s):  
Maria Hepel ◽  
Tania Tannatoli ◽  
Christopher Baxter ◽  
Richard Stephenson
Keyword(s):  
Boron Nitride ◽  
Potential Temperature ◽  
Composite Films ◽  
Pure Metal ◽  
Deposition Potential ◽  
Metal Films ◽  
Solution Temperature ◽  
X Ray ◽  
Steel Substrates

ABSTRACTThe formation and characterization of composite films of copper/boron nitride (Cu/BN) and nickel/boron nitride (Ni/BN) are described. Composite Cu/BN and Ni/BN films were synthesized by a metal electrodeposition from suspensions of boron nitride particles on carbon steel substrates. The effects of concentration of boron nitride in the solution, temperature, potential and various additives on the morphology of composite films have been investigated. The morphology of these films was examined using Scanning Electron Microscopy. The elemental analysis for boron, nitrogen, copper and nickel was performed using Energy Dispersive X-ray Spectroscopy (EDS), and a Microprobe X-ray Analyzer. The Vickers hardness of Cu/BN and Ni/BN films prepared under different conditions was also investigated. It has been found that the composite Cu/BN and Ni/BN films have an increased microhardness as compared to the respective pure metal films. The effects of deposition potential, temperature, concentration of BN and presence of various additives on the microhardness of Cu/BN and Ni/BN films have been investigated.

Interfacial Characterization of Mosi2+ X Sic Composite Thin Films on Molybdenum Substrates

1996 ◽  
Vol 458 ◽  
Author(s):  
S. Govindarajan ◽  
J. J. Moore ◽  
T. R. Ohno ◽  
J. Disam
Keyword(s):  
Composite Film ◽  
Composite Films ◽  
Carbon Diffusion ◽  
Detailed Examination ◽  
X Ray Diffraction ◽  
Diffusion Anneal ◽  
Temperature Oxidation ◽  
X Ray ◽  
Diffusion Barrier Layer

ABSTRACTA novel coating architecture is being examined for enhancing the high temperature, oxidation resistance of molybdenum. The coating incorporates a thin, composite film of MoSi2+1.96 mole fraction SiC in order to match the coefficients of thermal expansion between the molybdenum substrate and the coating. Since the as-deposited composite film is amorphous in nature, a diffusion anneal treatment is carried out at 1000°C to achieve crystallization of the film. In this paper, a detailed examination of the Mo-MoSi2+1.96 SiC interface will be presented. The microstructural features of the composite films will be discussed based on electron microscopy, auger electron spectroscopy (AES), and X-ray diffraction analysis. Finally, a novel diffusion barrier layer for minimizing silicon and carbon diffusion from the coating to the substrate will be discussed.

Structural Characterization of Thin Metal Overlayers by X-ray Photoelectron and Auger-Electron Forward Scattering

1986 ◽  
Vol 83 ◽  
Author(s):  
W. F. Egelhoff
Keyword(s):  
Ultrathin Films ◽  
Surface Segregation ◽  
Metal Films ◽  
Epitaxial Films ◽  
Forward Scattering ◽  
Crystalline Lattice ◽  
Auger Electrons ◽  
X Ray ◽  
Metal Overlayers

ABSTRACTForward scattering of XPS and Auger electrons by atoms in a crystalline lattice produce beams of enhanced intensity radiating out from the surface at angles corresponding to the internuclear axes present in the top few atomic layers. This effect has been applied to analyze the mechanism of surface segregation in ultrathin metal films, to analyze the interdiffusion at the interfaces of ultrathin films, and to assess the effects of substrate contamination on the growth of epitaxial films. The systems studied in this work are Cu, Ni, and Co on Ni(100), however the purpose of this work is not to investigate these particular systems but to use them to illustrate the capabilities of forward scattering.

Composite Films of Nickel / Silicon Carbide

1997 ◽  
Vol 495 ◽  
Author(s):  
Maria Hepel
Keyword(s):  
Silicon Carbide ◽  
Corrosion Resistance ◽  
Vickers Microhardness ◽  
Composite Films ◽  
Deposition Potential ◽  
Nucleation And Growth ◽  
Steel Substrates ◽  
Nickel Silicon ◽  
Electrodeposition Of Nickel ◽  
Sic Films

ABSTRACTThe electrodeposition of nickel/silicon carbide (Ni/SiC) composite films formed from modified Watt's bath solutions under potentiostatic conditions on steel substrates was investigated. The effects of deposition potential, pH, variable concentration of SiC in suspension, and additives, such as coumarin and EDTA, on the nickel nucleation and growth transients, as well as on the composition and morphology of Ni/SiC films are described. Improved Vickers microhardness and corrosion resistance of these composite films were found in comparison to those of particle-free deposits.

New Ni-Me-P Electrode Materials

2015 ◽  
Vol 228 ◽  
pp. 39-48
Author(s):  
Bożena Łosiewicz ◽  
Magdalena Popczyk ◽  
Patrycja Osak
Keyword(s):  
Electrode Materials ◽  
Amorphous Matrix ◽  
Alloy Coating ◽  
Amorphous Structure ◽  
Deposition Potential ◽  
Nickel Matrix ◽  
Surface Distribution ◽  
Molecular Mixing ◽  
X Ray

The Ni-Me-P alloy coatings containing metal as alloying component (Me = Co, W) in a Ni-P amorphous matrix, were potentiostatically electrodeposited onto a polycrystalline Cu substrate. Deposition potential was established based on polarization curves of electrodeposition of Ni-Co-P, Ni-W-P and Ni-P alloy coatings. SEM, EDS, XRD and X-ray microanalysis methods, were applied for chemical and physical characterization of the obtained coatings. Linear analysis of Ni, Co and W distribution in the microregions of the appropriate alloy coating revealed that surface distribution of these elements is homogeneous what is due to a molecular mixing of the amorphous nickel matrix with the alloying components. It was found that the Ni-Co-P and Ni-W-P coatings have the amorphous structure like the Ni-P deposit and alloying components as Co or W are built-in into the appropriate coating in the amorphous form. The mechanism of the induced codeposition of these ternary Ni-Me-P coatings, has been discussed.

Preparation and characterization of hexagonal boron nitride and PAMPS-NMPA-based thin composite films and investigation of their membrane properties

Ionics ◽  
2015 ◽  
Vol 21 (10) ◽  
pp. 2871-2878 ◽  
Author(s):  
Mehmet Sirin Tutgun ◽  
Deniz Sinirlioglu ◽  
Sevim Unugur Celik ◽  
Ayhan Bozkurt
Keyword(s):  
Boron Nitride ◽  
Hexagonal Boron Nitride ◽  
Composite Films ◽  
Membrane Properties

Structural Transformations of Boron Nitride Powders Obtained by Mechanical Milling Process

2009 ◽  
Vol 68 ◽  
pp. 101-108
Author(s):  
Rodrigo A. Esparza ◽  
J. Ayala ◽  
C. Ángeles-Chávez ◽  
G. Rosas ◽  
Ramiro Pérez
Keyword(s):  
Boron Nitride ◽  
Microstructural Characterization ◽  
Structural Transformations ◽  
Milling Process ◽  
X Ray Diffraction ◽  
Microstructural Characteristics ◽  
X Ray ◽  
Diffraction Patterns ◽  
Milled Powders

Mechanical milled powders of boron nitride were obtained. The microstructural characterization of these milled powders was carried out using X-ray diffraction technique. Insights on the nature of the crystalline phases obtained in these milled powders were obtained between comparisons of theoretical and experimental X-ray diffraction patterns. Observations on the phase transformations have been carried out using calorimetry and thermogravity experiments. Morphological and microstructural characteristics of nanocrystals are obtained using SEM and HRTEM instruments.

Structural and Magnetic Characterization of Rare Earth and Transition Metal Films Grown on Epitaxial Buffer Films on Semiconductor

1989 ◽  
Vol 151 ◽  
Author(s):  
R. F. C. Farrow ◽  
S. S. P. Parkin ◽  
V. S. Speriosu ◽  
A. Bezinge ◽  
A. P. Segmuller
Keyword(s):  
Rare Earth ◽  
Structural Characteristics ◽  
Metal Films ◽  
Epitaxial Films ◽  
Coherency Strain ◽  
Magnetic Data ◽  
Bulk Crystals ◽  
Structural Effects ◽  
X Ray

ABSTRACTStructural and magnetic data are presented and discussed for epitaxial films of rare earth metals ( Dy, Ho, Er) on LaF3 films on the GaAs(TTT) surface and Fe on Ag films on the GaAs(001) surface. Both systems exhibit unusual structural characteristics which influence the magnetic properties of the metal films. In the case of rare earth epitaxy on LaF3 we present evidence for epitaxy across an incommensurate or discommensurate interface. Coherency strain is not transmitted into the metal which behaves much like bulk crystals of the rare earths. In the case of Fe films , tilted epitaxy and long-range coherency strain are confirmed by X-ray diffractometry. Methods of controlling some of these structural effects by modifying the epitaxial structures are presented.

Ultra Small Angle X-Ray Scattering Characterization of Temperature-Sensitive Ferrogels Prepared Using Magnetic Nanoparticles

2013 ◽  
Vol 1453 ◽  
Author(s):  
Kamlesh J. Suthar ◽  
Muralidhar K. Ghantasala ◽  
Derrick C. Mancini ◽  
Jan Ilavsky
Keyword(s):  
Small Angle ◽  
Quantum Interference ◽  
Solution Temperature ◽  
Temperature Sensitive ◽  
X Ray ◽  
X Ray Scattering ◽  
Transmission Electron ◽  
Hydrogel Particle ◽  
Ray Scattering

ABSTRACTTemperature-sensitive ferrogel prepared using Fe3O4 nanoparticles are characterized under varying temperature conditions. The nanoparticles were distributed in Nisopropylacrylamide (NIPAm) during their polymerization to form hydrogel. Particle distribution and agglomeration characteristics of the prepared ferrogels were investigated using ultra small angle x-ray scattering (USAXS) at various temperatures through the Lower Critical Solution Temperature (LCST). Transmission electron microscopy (TEM) was used to estimate the particle size distribution. The magnetic property was investigated using direct current superconducting quantum interference device (DC-SQUID) under hydrated conditions. The USAXS analysis showed an increase in the volume of particles without changing the agglomeration characteristics as the temperature is increased during the measurements. The ferrogel did not show any sedimentation or particle detachment from the gel under thermal cycling. Details of our results and analysis are presented.

Synthesis and Characterization of a POSS-Urethane Hybrid Coating for Use in the Corrosion Protection of Metal

2005 ◽  
Vol 23 ◽  
pp. 231-234 ◽  
Author(s):  
Matthew Oaten ◽  
Namita Roy Choudhury
Keyword(s):  
Corrosion Protection ◽  
Photoelectron Spectroscopy ◽  
Hybrid Coating ◽  
Scanning Calorimetry ◽  
Modulated Differential Scanning Calorimetry ◽  
Clean Steel ◽  
X Ray ◽  
Oligomeric Silsesquioxane ◽  
Steel Substrates

The potential of cyclic silsesquioxanes as flexible coatings has been explored in this work for corrosion protection of metal. A polyurethane coating containing an inorganic polyhedral oligomeric silsesquioxane (POSS) was synthesized and characterized by means of photo-acoustic infrared spectroscopy, X-ray photoelectron spectroscopy (XPS), contact angle and modulated differential scanning calorimetry (MDSC). The coating has been applied to clean steel substrates via dip and spin coating. The POSS based hybrid coating is found to be uniform, dense and essentially defect free. XPS shows that the coating forms a lamellar layered structure on the substrate.

Characterization of Titanium Carbides Coatings Using X-Ray Microanalysis in Scanning Electron Microscopy

2010 ◽  
Vol 297-301 ◽  
pp. 93-96
Author(s):  
R. Gheriani ◽  
R. Bensaha ◽  
Rachid Halimi
Keyword(s):  
High Vacuum ◽  
Pure Titanium ◽  
X Ray ◽  
Dense Microstructure ◽  
Titanium Target ◽  
Titanium Carbides ◽  
Qualitative And Quantitative Study ◽  
Steel Substrates ◽  
The Relationship

X-ray microanalysis was used in the qualitative and quantitative study of titanium carbides obtained by deposition of thin titanium films on steel substrates using reactive r. f. sputtering of a pure titanium target. The samples are subjected to high vacuum annealing at a temperatures between 200 and 1000°C for 60 min. The morphological analysis by SEM shows that all films exhibited a dense microstructure. The EDS pattern of X-ray microanalysis shows that the non treated samples mainly consist of titanium. The concentration of Ti decreases progressively with the annealing temperature therefore the carbon and iron concentrations increases, this is as result of atomic interdiffusion between the substrate and the thin film. In the highest temperatures of annealing we note the diffusion of the elements of substrate towards outside layers even for those having weak concentrations. The relationship between mechanical properties and the reaction is carried out by Vickers micro-hardness measurements.

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