TY - JOUR
T1 - Synthesis, characterization and formation mechanism of SiC/spinel nanocomposite
AU - Tavangarian, Fariborz
AU - Li, Guoqiang
N1 - Funding Information:
This investigation was partially supported by Cooperative Agreement NNX11AM17A between NASA and the Louisiana Board of Regents under contract NASA/LEQSF (2011-14)-Phase3-05.
PY - 2014/6/15
Y1 - 2014/6/15
N2 - This paper reports the successful synthesis of SiC/spinel (MgAl 2O4) nanocomposite from talc, aluminum and graphite powders. The initial powders were mixed to obtain stoichiometric spinel containing 27.26 wt.% SiC. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and transmission electron microscopy (TEM) techniques were utilized to characterize the synthesized powders. SiC/spinel nanocomposite was obtained after 6 h ball milling of initial materials in argon atmosphere with subsequent annealing at 1200 C for 1 h in vacuum. The obtained nanocomposite had crystallites size between 1 and 15 nm with the mean diameter of 9 nm. The SiC/spinel composite formation mechanism was scrutinized. The results showed that SiC/spinel nanocomposite was not produced directly and the formation of some intermediate compounds is unavoidable during the synthesis procedure. The SiC/spinel nanocomposite powder may be a potential nanocomposite for high temperature applications with self-crack-healing capability.
AB - This paper reports the successful synthesis of SiC/spinel (MgAl 2O4) nanocomposite from talc, aluminum and graphite powders. The initial powders were mixed to obtain stoichiometric spinel containing 27.26 wt.% SiC. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and transmission electron microscopy (TEM) techniques were utilized to characterize the synthesized powders. SiC/spinel nanocomposite was obtained after 6 h ball milling of initial materials in argon atmosphere with subsequent annealing at 1200 C for 1 h in vacuum. The obtained nanocomposite had crystallites size between 1 and 15 nm with the mean diameter of 9 nm. The SiC/spinel composite formation mechanism was scrutinized. The results showed that SiC/spinel nanocomposite was not produced directly and the formation of some intermediate compounds is unavoidable during the synthesis procedure. The SiC/spinel nanocomposite powder may be a potential nanocomposite for high temperature applications with self-crack-healing capability.
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U2 - 10.1016/j.jallcom.2014.02.047
DO - 10.1016/j.jallcom.2014.02.047
M3 - Article
AN - SCOPUS:84897704909
SN - 0925-8388
VL - 598
SP - 106
EP - 112
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -