Functionally graded metal matrix composite sheet
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United States of America Patent
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Feb 26, 2013
Grant Date -
Feb 24, 2011
app pub date -
Oct 28, 2010
filing date -
Apr 11, 2007
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Abstract
A method of making a functionally graded metal matrix composite (MMC) sheet having a central layer of particulate matter, the particulate matter having a size of at least about 30 microns. The method includes providing a molten metal containing particulate matter to a pair of advancing casting surfaces. Solidifying the molten metal while advancing the molten metal between the advancing casting surfaces to form a first solid outer layer, a second solid outer layer, and a semi-solid central layer having a higher concentration of particulate matter than either of the outer layers. Solidifying the central layer to form a solid metal product including a central layer sandwiched between the outer layers and withdrawing the metal product from between the casting surfaces.
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