Digitale Medien
s.l. ; Stafa-Zurich, Switzerland
Advances in science and technology
Vol. 45 (Oct. 2006), p. 619-628
ISSN:
1662-0356
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Allgemeine Naturwissenschaft
,
Technik allgemein
Notizen:
Mechanical activation (MA) is used extensively as a relatively no expensive method forthe modification of physico-chemical properties of dispersed systems in technologies for obtainingpowders and ceramics. Different processes that occur during MA of powders lead to the formationof specific structures that promote and accelerate solid-state reactions, as well as densificationduring sintering. Changes of particle size and structure during MA of the ceramic parent materialare the sources of the morphological and structural metastability of the starting powders and theycan affect the sintering process, positively or negatively. Many properties of final polycrystallineceramics strongly depend on a green body microstructure and on conditions under which the greenbody is sintered. From the other side green body microstructure depend on a powderscharacteristics such as morphology, particle and pore size distributions. Regarding above mentionedactivation and sintering must therefore be carried out under strictly controlled conditions in order toavoid influences that might cause a deterioration of the final properties of the ceramic materials.The present study is focused on the processes of sintering that occurred in mechanically activatedsingle and multiphase oxide powders
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.45.619.pdf
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