Abstract
ZrO2 and its modified versions containing MgO and Y2O3 were selected as particulate reinforcement in order to achieve better mechanical properties of mullite. Particulate composites up to 25 vol % ZrO2 and its modifications were pressed to 55% relative density at 300 MPa followed by sintering at 1600°C and 1650°C for one hour. Studies were conducted on fracture toughness, transverse rupture strength, hardness, dielectric constant, microstructure and fractography. Composites sintered at 1650°C were found superior in properties than those at 1600°C. The maximum strength of mullite composites was observed at a composition of 10 vol % ZrO2.
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Kapuri, N., Rai, K.N. & Upadhyaya, G.S. Sintering of mullite-based particulate composites containing ZrO2 . JOURNAL OF MATERIALS SCIENCE 31, 1481–1487 (1996). https://doi.org/10.1007/BF00357856
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DOI: https://doi.org/10.1007/BF00357856