Title: IMPLEMENTATION OF EXPERIMENTAL DESIGN IN EVALUATING THE MECHANICAL
PROPERTIES OF CERAMIC COMPOSITES
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Authors: Asotah Wisdom, Onuoha Chukwudike, Medupin Rasaq Olawale and Elakhame Zeberu |
Abstract: The influence of independent variables (firing temperature and residue content) on mechanical properties –
hardness, compressive strength, flexural strength, compression modulus and energy at the break – of ceramic
composites was investigated through experimental design. Microstructural evaluation using scanning electron
microscopy (SEM) and mineralogical identification using x-ray diffraction (XRD) was also accomplished to
understand the structure-property relationship. In analysing the observed data, variance analysis was
employed to determine the statistical significance of the factors on the responses and regression equations
showing correlations were developed. The observed data were shown to accept the null hypothesis for
hardness, compression modulus and compressive strength, while flexural strength and energy at break
rejected the null hypothesis judging by the p-value. The flexural strength showed a good correlation, but the
influence of firing temperature and residue was minimal. However, both factors' square was shown to
influence the flexural strength considerably. The study presents a systematic way to understand causal
relationships, ensuring that product specifications and quality are met.
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Keywords: Ceramics, Central Composite Design, Response Surface, Compressive Strength,
Optimisation
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DOI: http://dx.doi.org/10.52267/IJASER.2022.3203
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