SURFACE STRUCTURE OF ALUMINUM-BASED MEMBER
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United States of America Patent
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Sep 7, 2017
app pub date -
Feb 23, 2017
filing date -
Mar 7, 2016
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Abstract
To provide a surface structure of an aluminum-based member which can further improve heat insulating properties and heat shielding properties of the aluminum-based member. In an aluminum-based member 1 containing at least a silicon composition, a porous oxide film 2 is provided on a surface of the aluminum-based member 1, and the oxide film 2 is constituted to have at least a pore 2a extending from the surface toward an inside in a thickness direction of the oxide film 2 and a void 3a present inside the silicon composition 3 extending in a direction substantially orthogonal to the thickness direction of the oxide film 2.
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