Sökning: "erosion of material"
Visar resultat 21 - 25 av 113 avhandlingar innehållade orden erosion of material.
21. Investigation of Suffusion in Glacial Till Dam Cores : Testing methods and critical hydraulic gradients
Sammanfattning : Suffusion is an internal erosion mechanism that occurs in embankment dams when fine grained particles in the dam core are washed out by seepage. Initiation of internal erosion depends mainly on three major factors: grain size distribution of the soil, stress conditions and hydraulic gradient; whilst its continuation depends on the properties of the filter. LÄS MER
22. Physical vapor deposition and thermal stability of hard oxide coatings
Sammanfattning : The state-of-the-art tools for machining metals are primarily based on a metal-ceramic composite (WC-Co) coated with different combinations of carbide, nitride, and oxide coatings. Combinations of these coating materials are optimized to withstand specific wear conditions. LÄS MER
23. Oxide Formation and Degradation during Erosion-Corrosion of Iron and Nickel Based Alloys
Sammanfattning : Erosion-corrosion is, in many technical applications, a serious material degradation process caused by dynamic particle/fluid mixtures. Pipes transporting particle containing liquids, jet engines, gas turbines, and fluidised bed combustion (FBC) power plants are examples of systems which are considered to be especially susceptible. LÄS MER
24. Dynamics and Erosion of Solids in Protoplanetary Disks
Sammanfattning : Protoplanetary disks are the natural by-product of star formation and the sites of planet formation. Initially, they are composed of the gas and small solids they inherit from the molecular cloud they form in. The interactions between this material is complex and understanding their details is key for a complete picture of planet formation. LÄS MER
25. Porcelain veneering of titanium : clinical and technical aspects
Sammanfattning : Guld- och andra legeringar har i många år använts som material vid framställning av kronor och broar för ersättning av skadade eller förlorade tänder. Emellertid har tvivel uppstått kring lämpligheten av att använda guldlegeringar i tandersättningar, då guld har visat sig kunna ge biverkningar i form av allergiska reaktioner. LÄS MER