![]() ![]() This will include small group based research to investigate the geological/geomorphic development of coral reef systems in a geographical region of your choice, which will form the basis for a research presentation. How might reefs respond to future environmental changes?Ī key focus of the module will be the opportunity to undertake your own research to address questions around the impacts of environmental change on reef systems over a range of temporal scales.What physical and geomorphological processes operate on contemporary reef systems, and how are these linked to reef landform development?.How have coral reef systems responded to past sea level and environmental change?.Specifically, you will explore broad questions such as ![]() In this module you will examine the geomorphological and ecological processes that interact to determine the contemporary occurrence and form of coral reef systems, their Holocene growth histories, and how future growth potential may change under changing environmental conditions. One of the most pressing and fundamental challenges in coral reef science is to project the future for coral reefs and reef-related landforms under rapidly changing climatic and environmental conditions. Number students taking module (anticipated)ĭescription - summary of the module content Module description Tropical Coastal Environments: Geomorphology and Environmental Change This force causes deformation or fracture leading to the mechanical activation of the powder because the imperfection of its particles increases and in turn influences the properties acquired by the hardmetal.Home Staff Modules Modules Tropical Coastal Environments: Geomorphology and Environmental Change Module title However, the compressive forces are not equal in quasi-isostatic compression conditions, and there is always one force that is greater than the others. Each WC particle was compressed from all sides by the neighboring WC and Co particles, resulting in quasi-isostatic compression. Those papers found that the deformation and fracture of single crystals under high isostatic pressures were accompanied by a sharp increase in the dislocation density. The results were analyzed using experimental data published previously on the effect of high isostatic pressure on the multiplication of dislocations and the fracture of single crystals. Scanning electron microscopy photographs of the indenter imprints showed massive cracking of the WC grains. ![]() Hardness measurements at different loads up to 300 N showed that hardness increased at CIP pressures up to 0.3 GPa and slightly decreased in CIP at 0.4 GPa. An intermetallic Co.sub.0.8W.sub.0.2 phase emerged in the samples subjected to preliminary CIP at 0.4 GPa. The Co layer became thinner with pressure being increased to 0.3 GPa and slightly thicker at a pressure of 0.4 GPa. The WC grains refined when CIP pressure increased to 0.2 GPa but slightly coarsened after CIP at 0.3 and 0.4 GPa. The coercive force increased nonmonotonically with pressure. The density of the CIP samples increased linearly with pressure prior to sintering and reached its maximum at 0.2 GPa for the sintered CIP samples. Transformer oil served as the pressure transmission medium. A multiplication installation was employed for cold isostatic pressing. Abstract : The paper examines how cold isostatic pressing (CIP) of powder samples preformed by uniaxial pressing at up to 0.4 GPa influenced the density, coercive force, structure, hardness, and phase composition of the WC-8 wt.% Co (VK8) hardmetal after sintering in vacuum. ![]()
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