ISSN:
1662-0356
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Allgemeine Naturwissenschaft
,
Technik allgemein
Notizen:
Electrophoresis is the effect that when an electric field is applied to a suspension of apowder in a liquid, the powder particles move under influence of this field. Frequently the powderparticles also deposit at one of the electrodes. The form of the electrode determines the form of thedeposit, hence shaping is possible. The current insights into the science and technology ofelectrophoretic deposition (EPD) will be summarized. EPD is well suited for shaping layeredmicrostructures (laminates), by simply changing repeatedly between two or more suspensionsduring deposition. Tubular laminates consisting of silicon carbide layers and crack deflectinggraphite interlayers have been produced. These tubes demonstrate an enhanced fracture energy anda gradual mode of failure. Another area of advanced ceramics where the use of EPD makes senseare functionally graded materials (FGM) in which one tries to combine in one component highhardness and high toughness. EPD allows the formation of FGM by depositing from a powdersuspension to which a second suspension is continuously added during the process. An examplewill be shown of a graded WC-Co hardmetal
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.45.1075.pdf
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