Nanotechnology for Encapsulating Zirconium Boride upon Formation of Heat-Resistant Coatings

Thermogravimetric investigation of the oxidation of the ZrB2-SiO2 composite in the temperature range 800–1300°C

“…This behavior is most likely associated with the "loosening" effect exerted by quartz because of its high linear thermal expansion coefficient and the nonbonding character of the glass melt. Upon addition of 3, 20, and 50 wt % quartz and heating to 1300 ° C for 1 h, the protective properties of the barrier layer [6] increase by 40, 65, and 70%, respectively, as can be judged from the curves ∆ m = f ( t ) shown in Fig. 2d.…”

“…The presence of the amorphous phase (the glass matrix) is observed for composite 4 at a temperature of 1200°C both on the sample surface and at a depth of 50 µm. In [6], the effect of introduction of silica in the form of quartz and sol on the encapsulation of zirconium boride was revealed using of the quantitative X-ray powder diffraction analysis. It can be seen from Fig.…”

“…It can be seen from Fig. 3 constructed with the use of the data taken from [6] that the decrease in the quartz content is caused by its consumption for the formation of the glass melt.…”

“…We carried out a systematic investigation with the aim of preparing composite materials based on boronand silicon-containing compounds with the use of hightemperature heat treatment of compact samples produced by cold molding or slip casting in an air atmosphere [5][6][7][8].…”

“…Information important for the development of an effective technology for synthesizing new materials of this type and for the study of their thermal stability can be obtained from kinetic investigation [6,9].…”