ISSN 2594-5327
49º Congresso anual — Vol. 49, Num. 1 (1994)
Título
Autoria
DOI
Downloads
Resumo
The erosion behaviour of various ceramic materials covering a broad range of microstructures has been evaluated under the condition of ultrasonic generated bubble cavitation in distilled water. The ceramics have been tested in the conditions as sintered and polished, after thermal shock by laser beam irradiation and under additional equiaxial tensile stress. The wear and damage mechanisms have been evaluated by scanning electron microscopy. The paper presents the erosion data and discusses the micromechanisms of this fatigue-like wear type in relation to the microstructural and mechanical characteristics of the ceramics. It has been found that: a simple laboratory setup provides a ranking of the erosion rates of ceramics in this tribosystem high erosion resistance correlates to high elastic resilience, high hardness, high fracture toughness and polyphase microstructures with high interfacial strength near surface damage can be detected and quantified by cavitation erosion test erosion rates increase under additional tensile stress due to stress corrosion cracking. The paper closes with field test results of ball valves and slide gate valves designed as forged steel housings with ceramic inlays.
Palavras-chave
Cavitation erosion, Ceramic materials, Microstructure, Tensile stress, Wear resistance
Como citar
Pohl, Michael; Waldherr, ErnstUlrich.
CAVITATION EROSION OF CERAMIC MATERIALS,
p. 4490-4499.
In: 49º Congresso anual,
Rio de Janeiro, Brasil,
1994.
ISSN: 2594-5327, DOI 10.5151/2594-5327-49v9-401-410
