ISSN:
1662-0356
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Natural Sciences in General
,
Technology
Notes:
The development of technologies for joining ceramics and metals is connected with anintroduction of new ceramic materials and new applications of ceramic-metal joints, to work in evermore difficult conditions. It concerns mainly ceramic-metal joints working at high and variabletemperatures (a facing layer of burners, turbine vanes, etc.) or in a chemically aggressiveenvironment (chemical apparatuses, purification plants). This paper presents the analysis of theinfluence of the bonding technique on thermal residual stresses generated in ceramic-metal jointsand their properties. Technological bonding tests were made using well-known diffusion bondingand powder metallization techniques, and with elaborated sintered Al2O3-Cr gradient interlayer.Numerical calculations (the finite elements method) of the state of thermal residual stresses, as wellas the verifying technological tests, were made for the following pair of materials: Al2O3 ceramics -heat resisting steel. There were also made tests of resistance for sudden temperature changes and foroxidation at high temperature. There was found a significant effect of the bonding techniques on thethermal residual stresses and properties of obtained alumina-steel joints
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.45.1614.pdf
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