TY - JOUR
T1 - Transmission electron microscopy of liquid phase densified SiC
AU - Carpenter, Ray
AU - Braue, W.
AU - Cutler, Raymond A.
N1 - Funding Information:
This research was partially supported by DOE under the Small Business Innovation Research (SBIR) program (contract DE-AC03-84ER80191) at Ceramatec, Inc. The electron microscopy was done in the NSF ASU Facility for High Resolution Electron Microscopy at the Center for Solid State Science. The authors are pleased to acknowledge assistance and useful discussions of Professor David J. Smith.
PY - 1991/9
Y1 - 1991/9
N2 - Transmission electron microscopy was used to characterize microstructures of SiC densified using a transient liquid phase (resulting from the reaction of A12O3 with A14C3) by hot pressing at 1875 °C for 10 min in N2. High resolution electron microscopy showed that the SiC grain boundaries were free of glassy phases, suggesting that all liquid phases crystallized upon cooling. Phases that might be expected due to reactive sintering (i.e., AlN, Al2OC, A1203, Al4O4C, Al3OP3N, or solid solutions of SiC, AlN, and Al2OC) were not observed. However, significant Al, Si, O, and C concentrations were found at all triple junctions of these rapidly densified ceramics.
AB - Transmission electron microscopy was used to characterize microstructures of SiC densified using a transient liquid phase (resulting from the reaction of A12O3 with A14C3) by hot pressing at 1875 °C for 10 min in N2. High resolution electron microscopy showed that the SiC grain boundaries were free of glassy phases, suggesting that all liquid phases crystallized upon cooling. Phases that might be expected due to reactive sintering (i.e., AlN, Al2OC, A1203, Al4O4C, Al3OP3N, or solid solutions of SiC, AlN, and Al2OC) were not observed. However, significant Al, Si, O, and C concentrations were found at all triple junctions of these rapidly densified ceramics.
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U2 - 10.1557/JMR.1991.1937
DO - 10.1557/JMR.1991.1937
M3 - Article
AN - SCOPUS:0026223099
SN - 0884-2914
VL - 6
SP - 1937
EP - 1944
JO - Journal of Materials Research
JF - Journal of Materials Research
IS - 9
ER -