Abstract
The effect of long heat treatment (single and double firing in a tunnel kiln) of samples based on a HBCS in Al2O3‒ SiO2‒SiC-system on their indicators was studied. Samples containing 15 % SiC and 1 and 2 % Si are characterized by a significant increase (up to 9 %) an increase in porosity and a decrease in strength compared to the original samples (without SiC) after long heat treatment (120 hours in the range of 1300‒1400oC). A significant increase in the volume of the samples is due not only to the oxidation of SiC or Si, but also to additional mullite formation. It is assumed that sequentially following the process of oxidation of SiC at a certain stage of heat treatment, the process of mullitization proceeds due to the interaction of the newly formed SiO2 in the form of cristobalite with Al2O3bauxite. Ill. 6. Ref. 19.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
