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Showing 1 to 20 of 32 for “"Abrasives"”.
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Environmental Performance of Copper Slag and Barshot as Abrasives
… to evaluate the environmental performance of two abrasives Copper Slag and Barshot in terms of productivity (in terms of area cleaned- ft2/hr), consumption and or used-abrasive generation rate (of the abrasive- ton/2000ft2; lb/ft2) and particulate emissions (mg/ft2; mg/lb; lb/lb; lb/kg; lb/ton). …
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Environmental Performance of Coal Slag and Garnet as Abrasives
… the environmental performance of two abrasives, coal slag and garnet which are commonly used by shipyards and many other industries in surface preparation of metallic surfaces. Environmental performance evaluated in this study included, (1) productivity (ft2/hr), (2) consumption and or …
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The effects of soil abrasives on rotary seal effectiveness
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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Performance and Total PM Emission Factor Evaluation of Expendable Abrasives
… was to evaluate performance of expendable abrasives and determine PM emission factors. Dry abrasive blasting was performed in an enclosed chamber and total PM samples were collected. Three commonly used expendable abrasives, coal slag, copper slag and specialty sand, were used to evaluate …
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Environmental Performance of Steel Grit and Specialty Sand as Abrasives
… in various components of the ship. Commonly used abrasives include sand, steel grit, mineral abrasives, metallic abrasives, and synthetic abrasives. The basic objective of this study was to understand the environmental performance of two abrasives, Steel Grit and Specialty Sand. The project was …
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Evaluation of Productivity, Consumption, and Uncontrolled Total Particulate Matter Emission Factors of Recyclable Abrasives
… surface finishes suitable for future adhesion. Abrasives used in this process can be recyclable or expendable. This study was undertaken to evaluate the performance of three recyclable abrasives: garnet, barshot and steel grit/shot in terms of productivity (area cleaned per unit time), …
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Surface texture enhancement of SLS processed turbine blades using a mix of flexible media and abrasives
Additive manufacturing technologies such as Selective Laser Sintering of Grade 5 Titanium has been used extensively within the aerospace industry as it allows for the fabrication of complex shapes with minimal material wastage. With the increased use of complex shapes, newer polishing technologies …
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The effects of pneumatically propelled abrasives in removing a finish on open and closed grained woods
… the possibility of using pneumatically propelled abrasives. to remove a finish from an open and a closed grain wood. This investigation was done on lauan (Philippine) mahogany and birch test panels that had been sprayed with a commercial lacquer. Major findings included: 1. The angle of the nozzle …
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Abrasive Blasting Process Optimization: Enhancing Productivity, and Reducing Consumption and Solid/Hazardous Wastes
… and environmental costs. Most commonly used abrasives were identified through a rigorous survey and were opted to be used in this study. The approach adopted to develop the relationships consists of a mass balance equation between the expended abrasives and disposed wastes to clean a …
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Abrasion-corrosion of downhole drill tool components
… revealed the presence of micro-scale (by abrasives similar size to the carbide grains i.e. less than 5 ?m) and macroscale abrasion (by abrasives orders of magnitude larger in size compared to the carbide grains). The wear-corrosion testing of candidate materials was investigated using a …
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An Investigation of Methods to Homogeneously Entrain and Suspend Abrasive Particles in a Low Pressure Dental Water Jet
… A broad review of methods to entrain abrasives in high pressure water jet systems was performed. A list of methods and concepts as possible solutions to entrain abrasives in a low pressure system has been generated. Product design principles were applied to screen, score, and rank …
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Moisture and stress effects on fretting between steel and polyimide coatings
… 52100 ball generated at high humidity acted as abrasives and accelerated the wear of the coatings. Variation of coating life among the three polyimides was attributed to the residual stress, which developed upon cooling from the annealing temperature due to the mismatch of thermal expansion …
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Evaluation and analysis of wear in progressive cavity pumps
… the rotor to the stator, and the presence of the abrasives carried within the slurry. for a pump manufacturer to remain active in the market they must provide the customer with optimised material selection, for both wearing parts, at a competitive price.Wear is not an intrinsic material property …
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The effect of abrasive properties on the surface integrity of ground ferrous materials.
… of the thermal properties of alumina and CBN abrasives on workpiece temperatures in grinding was investigated. A review of the literature revealed a lack of knowledge of the thermal properties of CBN limiting the accuracy of theoretical predictions of the heat conduction in CBN grinding. A …
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Ultraviolet Bonding of Diamond Abrasive Tools for Lap-Grinding Process
… fluid supplied during the process and the abrasives keep rolling and scratching in the working zone. By these actions, the material is removed from the work piece. As known, the lapping efficiency is limited due to the abrasion mechanism that is illustrated as three-body abrasion. In order …
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Scratching by pad asperities in chemical mechanical polishing
… that the pad used to polish the surface, not the abrasives in the slurry, may be responsible for the scratching of the Cu surface. This thesis applies this pad asperity scratching model to several CMP pads. The most relevant parameters to scratching, pad to copper hardness ratio and the …
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Evaluating abrasive wear resistance of extruder tooling materials using the dry sand rubber wheel abrasion test
… steels and steel bonded carbide composites. The abrasives used were AFS 50/70 test sand and Dresser Glasgrain crushed fused silica. Evaluation of test wear scars and wear debris from the tests using AFS 50/70 showed that delamination was the primary wear mechanism for the composite materials, …
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Abrasion-corrosion of cast CoCrMo in simulated hip joint environments
… in situ. The effects of solution chemistry, abrasives size / concentration and presence of proteins on the wear / corrosion level, wear-corrosion mechanisms, and the depassivation/repassivation kinetics of the CoCrMo have been explored. A variety of surface and sub-surface characterization …
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Health Assessment of Artisanal Metal Work: Injury Patterns, Aerosol Exposures, and Biomonitoring
… often linked to auxiliary materials like abrasives and welding consumables rather than the sculpted workpieces themselves. These findings underscore that exposure risks are shaped more by materials and task processes than by the core metal medium. Aim 3 assessed internal exposure among 12 …
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Wall Forces, Bulk Flow and Impact Speeds in a Vibratory Finisher: Modeling and Force Measurements
… is a mass finishing process that employs loose abrasives inside a vibrating container and, although widely used, its design is still mostly based on experience due to the complex behavior of vibrating granular media. In this work, experimental and numerical methods were employed to investigate …
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