ISSN:
1662-0356
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Natural Sciences in General
,
Technology
Notes:
Since conventional production of high-temperature materials involves highinvestments and costly consumption of both energy and time, reaction engineeringmethodology combined with near-net shaping is often the answer to problems associatedwith the fabrication of advanced materials. Over the last decades, the number of differentreaction–based processing methods for near-net-shaped ceramics has gradually increased.In this review, different reactive processing techniques and their potential for near-netshapingare treated, e.g. SHTS (self-supporting high temperature synthesis), the Lanxidemethod DIMEX®, reaction bonding (RB), reactive processing of Alumina-Aluminide Alloys(3A) and Al2O3-Al alloyed metal composites (3AMC).In addition to their potential for near-net shaping, other advantages to reactive processingroutes are recognized to be reduced processing temperatures, reduced glassy phaseformation at the grain boundaries, fine grained microstructures and improved mechanicalstrength. Since the exothermic reactions constitute the base for reactive processing of highquality materials in an economic way, control of these reactions is essential.The process flows are described together with characteristic features of process andmaterials. In addition, specific aspects of reaction-based synthesis will be illustrated withexamples from own work in the area of reaction bonding of silicon nitride and alumina
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.45.701.pdf
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