cermet group 4 leader : matthew lu members : rafael de jesus alexander go tian karl ong robert ng
TRANSCRIPT
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Cermet
Group 4 Leader : Matthew Lu
Members : Rafael De JesusAlexander Go Tian
Karl OngRobert ng
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What is a cermet ?
-A material consisting of processed ceramic particles bonded with metal and used in high-strength and high-
temperature applications. Also called ceramal.
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What is it made of ?
-A cermet is a composite material composed of ceramic (cer) and metallic (met) materials.
-A cermet is ideally designed to have the optimal properties of both a ceramic, such as high temperature resistance and hardness, and those of a metal, such as the ability to undergo plastic deformation.
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-The metal is used as a binder for an oxide, boride, or carbide. Generally, the metallic elements used are nickel, molybdenum, and cobalt.
-Depending on the physical structure of the material, cermets can also be metal matrix composites, but cermets are usually less than 20% metal by volume .
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Applications of cermets -Cermets were first used extensively in
ceramic-to-metal joint applications.
-Construction of vacuum tubes was one of the first critical systems, with the electronics industry employing and developing such seals.
-German scientists recognized that vacuum tubes with improved performance and reliability could be produced by substituting ceramics for glass.
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-Ceramic tubes can be outgassed at higher temperatures. Because of the high-temperature seal, ceramic tubes withstand higher temperatures than glass tubes.
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Cermet
-Ceramic tubes are also mechanically stronger and less sensitive to thermal shock than glass tubes. Today, cermet vacuum tube coatings have proved to be key to solar hot water systems
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http://www.cermetmaterials.com/
http://www.explainthatstuff.com/cermet.html
http://answers.com/topic/cermet
http://www.cermetinc.com/