1 Analytical transmission electron microscopy investigations on the effect of heat treatment of SiAION ceramics H Yurdakul S Turan and H Mandal Anadolu University Dept. of Materials Science Eng. Iki Eylul Campus Eskisehir 26555 TURKEY Purpose of Study Experimental Procedure XRD Results Producing SiAlON ceramics (1)
Triple Junctions/ Secondary Phase or Phases
Explain the composition of triple junctions/secondary phases and /-SiAlON grains by using Jeol 2100 F transmission electron microscope with attached Jeol STEM-HAADF and EDX dedectors
Heat treatment process to SiAlON ceramics
Characterisation of as-received and heat treated SiAlON ceramics by using XRD (2) Determine the heat treatment effects on to triple junctions composition by using analytical electron microscope techniques Characterisation of as-received and heat treated SiAlON ceramics by using Jeol 2100F with attached Jeol STEM-HAADF and EDX dedectors Heat-Treated /-SiAlON ceramics As-Received /-SiAlON ceramics STEM-HAADF Images and EDX Analysis Results of As-Received /-SiAlON STEM-HAADF Images and EDX Analysis Results of Heat-Treated /-SiAlON Triple Junction -SiAlON Secondary Phase Secondary Phase a-SiAlON Composition Y-Sm-Ca-Si-Al-O-N Composition Y-Si-Al-O-N Composition Y-Si-Al-O-N Composition Si-Al-O-N Composition Y--Si-Al-O-N Polytype Composition Si-Al-O-N a-SiAlON -SiAlON -SiAlON Secondary Phase Triple Junction Collapse of Triple Junctions Composition Y-Ca-Si-Al-O-N Composition Y-Sm-Ca-Si-Al-O-N Composition Y-Si-Al-O-N Composition Y-Sm-Ca-Si-Al-O-N Composition Si-Al-O-N Composition Si-Al-O-N EDX Elemental Line Scan Analysis Results of As-Received /-SiAlON EDX Elemental Line Scan Analysis Results of Heat Treated /-SiAlON Results Present preliminary research of as-recevied and heat treated /-SiAlON ceramics were performed by using EDX analysis with STEM-HAADF images and XRD techniques. According to these first results it was seen that secondary phases couldnt be dedected their elemental constituents by XRD were present both as-recevied and heat treated /-SiAlON ceramics in such as Y-Si-Al-O-N. Triple junctions compositions of both samples were shown in such as Y-Sm-Ca-Si-Al-O-N and ittrium was incorparated to -SiAlON structure. But actually EFTEM 3-window elemental mapping EFTEM-SI (spectum imaging) STEM-SI and PEELS (parallel electron energy loss spectrometer studies sould be performed in future works. If you would like to take more information please get in contact to sturan_at_anadolu.edu.tr
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