Thermal Conductivity modeling and heat capacity evaluation of Porous Abrasive Agglomerates Based on Flash Method Measurements

Abstract

This paper focused on studying the thermophysical properties, specific heat capacity and thermal conductivity, as well as improving the quality and proportions of chemical additives to the basic components such as abrasive granules of agglomerated aluminum oxide (Al₂O₃), water and dextrin compound. Measurements were carried out directly based on the detailed scanning technique of the main components of the laboratory-prepared samples (dry) - (38A60LVB5 - wet) - and this allowed for determining how the specific heat capacity (Cp) of these samples depends on the temperature within a specific range of 10 to 80 degrees Celsius. The results obtained from the model and mathematical equations related to the thermal properties showed that the thermal conductivity of the grinding wheels is low for the dry sample, unlike the wet sample, which has high conductivity relative to its moisture content. Therefore, it depends on the coolant used during the cutting process. The triangular microstructure model used to calculate the thermal conductivity of the experimental samples showed that the thermal conductivity depends on the apparent density of the two samples for both the dry (X = 0 kg/kg) and low-moisture (X ≈ 0.0065 - 0.01 kg/kg) conditions.