Fabrication of Si3N4 preforms from Si3N4 produced via CRN technique
作者： Fatih Çalışkan , Adem Demir , Zafer Tatlı
DOI: 10.1007/S10934-013-9736-9
关键词: Carbothermic reaction 、 Scanning electron microscope 、 Porosity 、 Materials science 、 Ceramic foam 、 Carbon black 、 Slurry 、 Composite material 、 Silicon nitride 、 Ceramic
摘要: Ceramic preforms with randomly distributed particles as reticulated porous structure which are generally used for metal infiltration as reinforcement, membranes, catalyst supports etc. Preforms are characterized by open porosity making possible their infiltration by liquid metal alloys. In this work, quartz powders using carbon black as a reducing agent were used for alpha Si 3 N 4 powders synthesis through a carbothermal reduction and nitridation (CRN) process. The CRN process was carried out under nitrogen flow at 1,450° C for 4 h. At high …
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