Alumina based refractories are usually used in metallurgical furnaces and their thermal shock resistance is of great importance. In order to improve thermal shock resistance and mechanical properties of alumina based refractories short ceramic fibers were added to the material. SEM technique was used to compare the microstructure of specimens and the observed images gave the porosity and morphological characteristics of pores in the specimens. Standard compression test was used to determine the modulus of elasticity and compression strength. Results obtained from thermal shock testing and mechanical properties measurements were used to establish regression models that correlated specimen properties to process parameters
Porous SiC/Cordierite Composite Material with graphite content (10%) was
synthesized. Evaluation of Young modulus of elasticity and thermal shock
behavior of these samples was presented. Thermal shock behavior was monitored
using water quench test, and non destructive methods such are UPVT and image
analysis were also used for accompaniment the level of destruction of the
samples during water quench test. Based on the level of destruction graphical
modeling of critical number of cycles was given. This approach was
implemented on discussion of the influence of the graphite content on thermal
stability behavior of the samples. [Projekat Ministarstva nauke Republike
Srbije, br. III 45012]
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