Sol-gel silane dielectric coatings. a model system for thermally stable dielectromagnetic SMC's

S. N B Hodgson, Y. X. Pang, B. Weglinski, D. Gaworska, J. Koniarek

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearch

Abstract

Dielectromagnetics are soft magnetic composites comprising iron powder functionalised with a thin continuous layer of electrical isolation, which is retained in-situ during processing to control eddy current losses in service. In recent years, a number of alternative proprietary compositions have been developed for such materials. Whilst it is clear that many of these offer substantial useful benefits, in terms of compaction behaviour, acceptable losses and improved magnetic permeability, the basis for these improvements remains largely unexplained, particularly for "thermally stable" chemically applied treatments such as phosphates, and there is relatively little scientific data to explain their function. For example are the improved characteristics a result of the chemical composition, coating thickness, coating contiguity, stress relief during heating, or improved density? This paper explores the effect of a simple silica coating as an essentially inert model system to explore systematically how the coating parameters influence magnetic and other physical properties.

Original languageEnglish
Title of host publicationEuro PM 2005
Subtitle of host publicationPowder Metallurgy Congress and Exhibition
PublisherEuropean Powder Metallurgy Association (EPMA)
Pages433-438
Number of pages6
Volume1
ISBN (Print)9781899072187
Publication statusPublished - 1 Jan 2005
EventEuropean Powder Metallurgy Congress and Exhibition 2005 - Prague, Czech Republic
Duration: 2 Oct 20055 Oct 2005

Conference

ConferenceEuropean Powder Metallurgy Congress and Exhibition 2005
Abbreviated titleEuro PM 2005
CountryCzech Republic
CityPrague
Period2/10/055/10/05

Fingerprint

Silanes
Sol-gels
Coatings
In situ processing
Magnetic permeability
Stress relief
Iron powder
Eddy currents
Chemical analysis
Phosphates
Compaction
Physical properties
Silica
Heating
Composite materials

Cite this

Hodgson, S. N. B., Pang, Y. X., Weglinski, B., Gaworska, D., & Koniarek, J. (2005). Sol-gel silane dielectric coatings. a model system for thermally stable dielectromagnetic SMC's. In Euro PM 2005: Powder Metallurgy Congress and Exhibition (Vol. 1, pp. 433-438). European Powder Metallurgy Association (EPMA).
Hodgson, S. N B ; Pang, Y. X. ; Weglinski, B. ; Gaworska, D. ; Koniarek, J. / Sol-gel silane dielectric coatings. a model system for thermally stable dielectromagnetic SMC's. Euro PM 2005: Powder Metallurgy Congress and Exhibition. Vol. 1 European Powder Metallurgy Association (EPMA), 2005. pp. 433-438
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Hodgson, SNB, Pang, YX, Weglinski, B, Gaworska, D & Koniarek, J 2005, Sol-gel silane dielectric coatings. a model system for thermally stable dielectromagnetic SMC's. in Euro PM 2005: Powder Metallurgy Congress and Exhibition. vol. 1, European Powder Metallurgy Association (EPMA), pp. 433-438, European Powder Metallurgy Congress and Exhibition 2005, Prague, Czech Republic, 2/10/05.

Sol-gel silane dielectric coatings. a model system for thermally stable dielectromagnetic SMC's. / Hodgson, S. N B; Pang, Y. X.; Weglinski, B.; Gaworska, D.; Koniarek, J.

Euro PM 2005: Powder Metallurgy Congress and Exhibition. Vol. 1 European Powder Metallurgy Association (EPMA), 2005. p. 433-438.

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearch

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Hodgson SNB, Pang YX, Weglinski B, Gaworska D, Koniarek J. Sol-gel silane dielectric coatings. a model system for thermally stable dielectromagnetic SMC's. In Euro PM 2005: Powder Metallurgy Congress and Exhibition. Vol. 1. European Powder Metallurgy Association (EPMA). 2005. p. 433-438