Restoring of strength and wear resistance of a metal matrix composite (MMC)
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United States of America Patent
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Feb 11, 2014
Grant Date -
Aug 19, 2010
app pub date -
Dec 10, 2009
filing date -
Dec 17, 2008
priority date (Note) -
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Abstract
The present invention relates to a method and an arrangement for restoring strength and wear resistant of a metallic matrix ceramic (1) comprising a metallic binder (2) and ceramic filler (3) particles, which metallic matrix ceramic (1) has been exposed for long term high temperature and pressure cycling, for example in a gas exhaust nozzle (6), whereby micro cracks (4) are developed in the outer layer (5) of the metallic binder (2) According to the invention this is achieved by virtue of the fact that the outer layer (5) of the metallic binder (2), partly or fully, is removed from the MMC part (1) by a chemical operation, where after the outer layer (5) is compressed by a compression operation for achieving a dense outer layer (5), in which filler (3) particles are close to each other.
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