Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 182 for “"tribological"”.
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Graphene in Tribological Applications: Experimental Approaches
L'abstract è presente nell'allegato / the abstract is in the attachment
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Tribological properties of gradient-density hydrogel surfaces
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-12-01
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The tribological behaviour of aluminium matrix composites
… in terms of their behaviour under various tribological conditions. In abrasive environments, the wear behaviour of each composite is dominated by their ability to resist indentation by hard particles. Abrasion against fine grit particles leads to a reduced load per abrasive particle and a …
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Tribological Behaviours Influenced by Surface Coatings and Morphology
… Al alloy for improving the wear resistance and tribological properties of the Al alloy. Effects of surface roughness and sliding velocity on the coefficient of friction (COF) of PEO coatings were particularly investigated in different tribological tests including low speed pin-on-disc tests, …
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Surface Engineering of Zirconium for Tribological Properties Enhancement
… about 200 HV, zirconium and its alloys have poor tribological properties and find limited applications in other fields of engineering. Efforts have been made in this work to develop surface engineering techniques to enhance the tribological properties of commercially pure zirconium (CP-Zr) and to …
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Ion plated carbon films and their tribological properties
The conventional ion plating technique is described and the physicalmechanism and energies involved in the technique reviewed. The triode(assisted discharge) ion plating is studied and it is shown to increasethe ionization several times.Ion plating with a hollow cathode discharge is studied. The …
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Tribological Comparison of Traditional and Advanced Firearm Coatings
The objective of this project is to find which type of coating has the best performance characteristics for finishing firearms. This is accomplished by measuring and comparing several performance characteristics, such as: adhesion, hardness, wear resistance, friction control, and corrosion …
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Tribological studies of micro/nanoscale thin solid films
… shearing force. Second, the mechanical and tribological properties for a novel material, La5Ca9Cu24O41 (LCCO), were evaluated, revealing that LCCO can be an attractive candidate as a nanothermal layer showing good tribological characteristics as well as thermal properties. Third, the contact …
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Tribological and mechanical characterizations of polyelectrolyte multilayer nanoassemblies
… and their exploitation in systems with tribological problems of practical relevance. In addition, their mechanical properties, crucial for the success of almost all applications being studied, have not been systematically characterized. This thesis focuses on the elucidation of the …
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Tribological Aspects of the Self-Loosening of Threaded Fasteners
Practically every engineering product with any degree of complexity uses threaded fasteners. Although threaded fasteners are generally considered a mature technology, significant problems exist with their use. This study has investigated a number of issues with the tightening and self-loosening of …
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Tribological evaluation of unlubricated and marginally lubricated bearing materials
This thesis presents friction and wear rate measurements of the copper based bearing materials used in thrust bearing of aircraft fuel pumps. Highly detailed friction and wear data was collected from 20% and 30% lead in bronze (leaded bronze) substrates and 10% indium in lead (lead/indium) coated …
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The tribological and wear properties of carbon-graphite composites
A range of carbon-graphites with differing properties has been evaluated for wear resistance. These include carbons with a high degree of graphitic order (natural and synthetic graphite), those with little or no such order (pitch bonded cokes, glassy carbons) and impregnated grades. Testing has …
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Tribological characteristics of coatings on aluminium and its alloys
… The aim of this investigation is to explain the tribological performance and wear mechanism(s) of an uncoated aluminium alloy, four anodic coated alloys, and also an electroless nickel alloy. All of the coatings are produced on three different aluminium alloys. The thickness of the anodic films …
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New Materials Systems for Advanced Tribological and Environmental Applications
A third project involved the design of new wide-spectrum antibacterial filters for point-of-use systems that are robust and can be easily regenerated and maintained. Silver coated fiberglass with colloidal sized silver particles was developed. Systems made of silver coated fiberglass are highly …
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The Mechanical and Tribological Properties of Ion Implanted Ceramics
… properties of the implanted specimens. The tribological properties of the implanted ceramics were investigated using single pass scratch tests. Friction coefficients were found to increase with dose up to the onset of amorphisation, even when visible scratch tracks were produced. This …
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Design of Surface Texture for the Enhancement of Tribological Performance
… on the contacting surfaces to improve the tribological performance in sliding, lubricated system. It is found that the geometric design of textures has a significant influence on the performance of textured surfaces. Some important geometric parameters, such as the area ratio and the …
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Tribological and Structural Characterisation of Ceramic on Metal Hip Replacements
A tribological investigation of ceramic on metal hip replacements was carried out using in vitro wear testing methods. Two ceramic materials, pure alumina and an alumina matrix compound (zirconia toughened alumina (ZTA)), were articulated against as-cast CoCrMo alloy cups. The diameter was changed …
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Tribological assessment of oil condition sensors for marine launching equipment.
Problems in hydraulic systems associated with hydraulic fluids are an important area of research. Time has proven that contamination control in hydraulic and lubricating systems are fundamental to reliability and performance. Contamination control is needed to guarantee the quality of the oil and …
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Tribological Investigation of Nickel Titanium Shape Memory Alloy (NiTi SMA) Coatings
… the application of NiTi SMA coating in the tribological field is still limited due to its low hardness and low wear resistance properties. In this study, the aim is to design a NiTi SMA coating structure with excellent mechanical properties and high wear resistance for tribological …
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