PROF. ADUDA BERNARD O.
B.Ed (Hons), MSc. (Nairobi), DIC, PhD (London),
VOIP 4101
Email: boaduda@uonbi.ac.ke
VOIP 4101
Email: boaduda@uonbi.ac.ke
A review of recently published ultrasonic velocity-porosity data on a variety of porous ceramic materials,
which included information on the pore structure, has been undertaken. These experimental data have been
compared with those calculated using a spheroidal pore model that incorporates information on pore volume
fraction, shape and orientation. Good agreement, especially when fractional porosity is less than ~ 0.25,
between the experimental and calculated values is obtained even when a single ‘effective’ pore shape is
employed in the calculation. The agreement improves if the pore shape at each particular porosity level (the
point-by-point analysis) is used. The predictive ability of the spheroidal pore model is therefore demonstrated.