Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/93632
Title: Dramatic effect of a small amount of MgO addition on the sintering of Al2O3-5 vol% SiC nanocomposite
Authors: Wang, J. 
Lim, S.Y.
Ng, S.C. 
Chew, C.H. 
Gan, L.M. 
Keywords: Al2O3-SiC nanocomposite
Densification
MgO
Microstructure
Sintering additive
Issue Date: Jan-1998
Citation: Wang, J.,Lim, S.Y.,Ng, S.C.,Chew, C.H.,Gan, L.M. (1998-01). Dramatic effect of a small amount of MgO addition on the sintering of Al2O3-5 vol% SiC nanocomposite. Materials Letters 33 (5-6) : 273-277. ScholarBank@NUS Repository.
Abstract: Adding a small amount of MgO, in the range of a few hundred ppm, into an Al2O3-5 vol% SiC nanocomposite has a dramatic effect on improving the sintered density of the nanocomposite. It was observed that the sintered density of the nanocomposite increases significantly with increasing MgO addition from 0 to 300 ppm. The increase rate slows down and then almost levels off with further increase in MgO content, up to 1000 ppm. More transgranularly fractured alumina grains were observed on the fracture surface of the MgO-doped nanocomposites than that observed on the fracture surface of undoped nanocomposite. The effects of such a small amount of MgO addition on the sintering and microstructural development of Al2O3-SiC nanocomposite may be explained using the arguments which have been documented for the beneficial effects of a small amount of MgO in alumina ceramics. © 1998 Elsevier Science B.V.
Source Title: Materials Letters
URI: http://scholarbank.nus.edu.sg/handle/10635/93632
ISSN: 0167577X
Appears in Collections:Staff Publications

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