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Showing 1 to 17 of 17 for “"hard coatings"”.
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Developing fully mixed oxidation-resistant hafnium aluminum diboride hard coatings deposited by low temperature CVD
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01
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Reactive magnetron deposition and characterization of ZrN thin films for decorative and field emission applications
… Potential uses of such films are as protective hard coatings as well as decorative layers. Carbon nanotubes (CNTs) were synthesized on ZrN, Al2O3, Si (100) and Al2O3/Si (100) substrates by means of sputtering under varying conditions of acetylene and hydrogen gas flow rates, deposition time as …
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Design and optimization of a play-free rotary magneto-rheological fluid brake for enhanced performance and durability
… of enhancing performance through additional hard coatings or alternative materials. Future work will focus on completing the accelerated aging process and further refining spline design and material selection to develop more reliable and durable prosthetic knees.
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Adhesion, Residual Stresses and Tribology of Rf Sputter Deposited Titanium Carbide Coatings
Mechanical properties of surface hard coatings depends strongly on both the adhesion of the coating to the substrate as well as the sign and magnitude of the residual stress in the coating. The residual stress in sputter deposited TiC films was found to be compressive and could be related to the …
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Design of ultra precision fixtures for nano-manufacturing
… of fixture contacts' stability and longevity via hard coatings. Conceptual and analytic models are developed for the integration of compliant elements, sensors and actuators within the fixture. The validity of these concepts/models is tested via a prototype HPF. Analytic models and design rules …
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Dynamics of sliding mechanisms in nanoscale friction
… as micromechanical systems (MEMS) and thin, hard coatings. For these systems, classical laws of friction are inappropriate due to the small dimensions of the sliding elements and the lack of excessive plastic deformation. This thesis presents a theoretical investigation of friction at the …
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Development of high temperature/oxidation- resistant PVD coatings for cutting tools using HIPIMS
… oxidation resistant, nanoscale, multilayer PVD, hard coatings have been developed through combine DC Unbalanced Magnetron (UBM) and High Power Impulse Magnetron Sputtering (HIPIMS) deposition technologies. The properties of the coatings lend themselves to the application of protecting cutting …
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Tribological studies of micro/nanoscale thin solid films
… tester and a dynamic stiffness tester. When a hard layer is coated on a soft substrate, both asperity interaction and soft substrate deformation should be considered. Fourth, the wear behavior of a layered sphere at the sliding inception was analyzed based on the finite element approach. The …
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The impact of coating architecture on the hardness, friction and wear resistance of hard and tribological nanocomposite coatings
… of interacting surfaces. Vapor-deposited surface coatings can provide extended lifetimes, increased efficiencies and energy savings for mechanical components and tools. These benefits can also be extended to space mechanisms and satellites with the use of vacuum solid lubricants. The material …
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Fabrication and tribology of composite coatings incorporating solid lubricant micro-reservoirs
… reservoirs on the surface of sputter-deposited hard coatings. Pin-on-disk tests were used to evaluate the lubricating performance of these newly devised composite coatings. Three sizes of the reservoirs were investigated: 1.5, 5 and 10 microm. The 10 microm-sized-reservoirs performed better in …
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Development Of Titanium Nitride/molybdenum Disulphide Composite Tribological Coatings For Cryocoolers
… thus increasing its efficiency. Tribological coatings having extremely high hardness, ultra-low coefficient of friction, and high durability at temperatures lower than 60 K are being developed to reduce friction and wear between the mating parts of the cryocooler thus improving its efficiency. …
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Ultraconformal chemical vapor deposition and synthesis of transition metal nitride films
… of adhesion and shear strength of this system. Hardness, elastic modulus, and friction coefficient are also measured.
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Growth, physical properties, and nanostructuring of epitaxial metastable hafnium aluminum nitride
Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2010-12-02T17:37:03Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Howe_Brandon.pdf: 35213703 bytes, checksum: 4339e1bf08b5bebc6922899d61292b4e (MD5)
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Deposition and characterisation of (Ti,Zr) based hard compound and multi-layer PVD films.
… An important process for the production of such coatings is Physical Vapour Deposition (PVD) which has proved to be a consistent, reliable and improving technique for industry. In the area of advanced wear resistant coatings however, fundamental research to improve deposition efficiency and …
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High power impulse magnetron sputtering (HIPIMS) : Fundamental plasma studies and material synthesis.
… technology is widely used for deposition of coatings with applications in various industries; coatings in semiconductor industry, optical coatings or hard coatings mostly used in car and aerospace industries. In 1999 novel physical vapour deposition technology entitled high power impulse …
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Growth and characterisation of multifunctional nanocomposite coatings
Novel nanocomposite coatings of the type Fe-Ti-N and Fe-Ti-O-N, having in-situ formed periodic multiphase nanocolumnar microstructures, have been developed by a two-target reactive magnetron sputter deposition and nanoparticle-assisted electro-co-deposition processes. Advanced thin-film …
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Co-reactant interactions with CVD surfaces: Activation or passivation of growth
… to improve the tribological properties of HfB2 hard coatings, as well as a new route to achieve atomic layer etching of metals. The conformal deposition of highly conductive or superconductive transition metal nitride thin films is technologically important for a wide range of applications. For …