Título

Factors Affecting the Erosive Wear of Ceramics

Factors Affecting the Erosive Wear of Ceramics

Autoria

MARGHERITA, CLERICO,

MARGHERITA, CLERICO,

Eu sou esse autor

DOI

10.5151/2594-5327-59-0001

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Resumo

Erosive wear is material loss from a solid surface due to relative motion in contact with a fluid, which may contain solid particles. Erosion damage (often crater-shaped) is found, on rocks, buildings, vehicles (also aircrafts, and helicopters), plant parts, etc. Erosive wear may be studied from two points of view: fluid dynamics and mechanics. Erosive damage may be measured as weight loss and from shape, dimensions, and morphology of erosive craters, often very similar to corrosion craters. In this paper are reported wear tests made in our Department, DIASP, and their results as weight loss and analysis of the erosion craters, given by the used Horizontal Air Blast Test Rig, from contour maps, 3D, and 2D topography, micrographs, and visualizations of jet impingements. Considering the results as weight loss from DIASP and Literature pointed out: Differences in wear given by the different used rigs; Properties of the test rig (nozzle diameter, attack angle, α, erodent speed, v, mean erodent diameter, Dₑ, erodent density into the jet, erosion time), erodent material (shape, hardness, Hₑ, particles tendency to fracture), and target material (type, grain dimensions, d₉, compression, σcₛ, and shear strength, fracture toughness, K, hardness, HV₁, or better HVₑ / HV₁ ,etc) affecting the erosive wear of ceramics. Also empirical criteria for quantifying the dependence of erosion rate, dE/de, (E is the eroded material amount and e is the erodent mass) on some properties were given. Proposed mechanisms and criteria, taking into account many properties together, were analyzed and compared with the results given by our analysis of the erosion craters.

Erosive wear is material loss from a solid surface due to relative motion in contact with a fluid, which may contain solid particles. Erosion damage (often crater-shaped) is found, on rocks, buildings, vehicles (also aircrafts, and helicopters), plant parts, etc. Erosive wear may be studied from two points of view: fluid dynamics and mechanics. Erosive damage may be measured as weight loss and from shape, dimensions, and morphology of erosive craters, often very similar to corrosion craters. In this paper are reported wear tests made in our Department, DIASP, and their results as weight loss and analysis of the erosion craters, given by the used Horizontal Air Blast Test Rig, from contour maps, 3D, and 2D topography, micrographs, and visualizations of jet impingements. Considering the results as weight loss from DIASP and Literature pointed out: Differences in wear given by the different used rigs; Properties of the test rig (nozzle diameter, attack angle, α, erodent speed, v, mean erodent diameter, Dₑ, erodent density into the jet, erosion time), erodent material (shape, hardness, Hₑ, particles tendency to fracture), and target material (type, grain dimensions, d₉, compression, σcₛ, and shear strength, fracture toughness, K, hardness, HV₁, or better HVₑ / HV₁ ,etc) affecting the erosive wear of ceramics. Also empirical criteria for quantifying the dependence of erosion rate, dE/de, (E is the eroded material amount and e is the erodent mass) on some properties were given. Proposed mechanisms and criteria, taking into account many properties together, were analyzed and compared with the results given by our analysis of the erosion craters.

Palavras-chave

erosive wear, ceramics, mechanisms, criteria

erosive wear, ceramics, mechanisms, criteria