Presented paper contains description and interpretation of the results of selected physicochemical and structural properties
of two types of composite sinters. They were constituted of a mixture of sintered microcrystalline corundum and bioglass
CaO-P2O5-SiO2-Na2O system intended for scaffolds to cell culture of human chondrocytes. The composites contained a mixture of both above-mentioned components in the volumetric proportion of 50:50 (W5) and 30:70 (W7). They were obtained
using powder metallurgy by free sintering in air atmosphere. Phase analysis of composites and verification of theoretical
identification using X-ray diffraction were performed. The same phases were found in both cases (Al2O3 SiO2 CaAl2Si2O8, Ca3 (PO4)2, Ca2Al4O7 and NaAlSiO4). Microscopic tests of composite surfaces were performed and some differences were
found. W5 sample was not completely covered with bioglass, whilst W7 sample was completely covered with bioglass with
few fine pores. Tests of surface topography confirmed the presence of large and small pores. Composite surfaces immersed
for 30 days in artificial blood plasma were tested and then electron microscopy analysis was performed. It was found that no
significant changes occurred on the surface of the W5 composite, probably partial corrosion of the glass happened. Spherical
forms characteristic of HA-hydroxyapatites were observed on the surface of sample W7. Human articular chondrocyte cells
were seeded on both types of sinters and proliferation assay was performed. Results indicate that tested scaffolds support
cellular attachment and proliferation of chondrocytes
