Synthesis of an Al/MgAl2O4 in situ metal matrix composite from silica gel

dc.contributor.author	Sreekumar, V M
dc.contributor.author	Pillai, R M
dc.contributor.author	Pai, B C
dc.contributor.author	Chakraborty, M
dc.date.accessioned	2015-08-06T06:22:50Z
dc.date.available	2015-08-06T06:22:50Z
dc.date.issued	2007
dc.identifier.citation	Journal of the American Ceramic Society 90(9):2905-2911;Sep 2007	en_US
dc.identifier.issn	0002-7820
dc.identifier.uri	http://ir.niist.res.in:8080/jspui/handle/123456789/1907
dc.description.abstract	An aluminum/MgAl2O4 in situ metal matrix composite has been synthesized using silica gel containing similar to 98% SiO2 in an Al-5Mg alloy. The thermodynamics and kinetics of MgAl2O4 formation have been discussed in detail. A transition phase of composition between MgO and MgAl2O4 has been detected in the SEM-EDS analysis of the particles extracted from the composite by a 25% NaOH solution. This confirms the gradual transformation of MgO to MgAl2O4 by the reaction 3SiO(2)(s)+2MgO(s)+4Al(l)-> 2MgAl(2)O(4)(s)+3Si(l). The stoichiometry, n, of MgAl2O4 has been found to sustain close to 1 and the crystallite growth of MgAl2O4 has been stopped at D similar to 30 nm in the composites held at 750 degrees C up to 10 h	en_US
dc.language.iso	en	en_US
dc.publisher	Wiley	en_US
dc.subject	Dispersoid suspensions	en_US
dc.subject	Interfacial reactions	en_US
dc.subject	Magnesium	en_US
dc.subject	Mgal2O4	en_US
dc.subject	Spinel	en_US
dc.subject	Mgo-Al2o3	en_US
dc.title	Synthesis of an Al/MgAl2O4 in situ metal matrix composite from silica gel	en_US
dc.type	Article	en_US
niist.citation