TY - JOUR
T1 - Sintering behavior, microstructure and mechanical properties of vacuum sintered SiC/spinel nanocomposite
AU - Li, Guoqiang
AU - Tavangarian, Fariborz
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 - 2014/12/5
Y1 - 2014/12/5
N2 - A mixture of SiC and spinel (MgAl2O4) nanopowder was prepared through the ball milling of talc, aluminum and graphite powder. The powder was uniaxially pressed into the form of pellets and the prepared specimens were annealed at various temperatures for different holding times. The prepared samples were investigated through X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), nanoindentation test, cold crushing strength (CCS) test and Archimedes principle test. The obtained results showed that the hardness, CCS and bulk density did not follow the same trend at different temperatures due to the interaction among various parameters. The detailed investigation of microstructure, phase changes and experimental conditions revealed the mechanisms behind these behaviors. The best sample obtained after annealing at 1200 °C for 1 h in vacuum had the mean hardness of 1.6 GPa and the mean CCS of 118 MPa.
AB - A mixture of SiC and spinel (MgAl2O4) nanopowder was prepared through the ball milling of talc, aluminum and graphite powder. The powder was uniaxially pressed into the form of pellets and the prepared specimens were annealed at various temperatures for different holding times. The prepared samples were investigated through X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), nanoindentation test, cold crushing strength (CCS) test and Archimedes principle test. The obtained results showed that the hardness, CCS and bulk density did not follow the same trend at different temperatures due to the interaction among various parameters. The detailed investigation of microstructure, phase changes and experimental conditions revealed the mechanisms behind these behaviors. The best sample obtained after annealing at 1200 °C for 1 h in vacuum had the mean hardness of 1.6 GPa and the mean CCS of 118 MPa.
UR - http://www.scopus.com/inward/record.url?scp=84904573218&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84904573218&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2014.06.173
DO - 10.1016/j.jallcom.2014.06.173
M3 - Article
AN - SCOPUS:84904573218
SN - 0925-8388
VL - 615
SP - 204
EP - 210
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -