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 language | English |
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Title of host publication | Euro PM 2005 |
Subtitle of host publication | Powder Metallurgy Congress and Exhibition |
Publisher | European Powder Metallurgy Association (EPMA) |
Pages | 433-438 |
Number of pages | 6 |
Volume | 1 |
ISBN (Print) | 9781899072187 |
Publication status | Published - 1 Jan 2005 |
Event | European Powder Metallurgy Congress and Exhibition 2005 - Prague, Czech Republic Duration: 2 Oct 2005 → 5 Oct 2005 |
Conference
Conference | European Powder Metallurgy Congress and Exhibition 2005 |
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Abbreviated title | Euro PM 2005 |
Country/Territory | Czech Republic |
City | Prague |
Period | 2/10/05 → 5/10/05 |