Effect of the thermal treatment mode on the composition and structure of ZrB2-SiC system composites

Effect of ZrB2 addition on the oxidation behavior of Si-SiC-ZrB2 composites exposed at 1500°C in air

“…The oxidation rate of these Si-SiC-ZrB 2 materials, evaluated in terms of weight gain, was lower in comparison with ZrB 2 -SiC systems reported in the literature (13, 21, 24-26) but higher than the values measured for sintered SiC (Fig. 1A).…”

“…Veytizou et al (28) reported that the presence of both ZrO 2 and amorphous silica, in addition to the presence of interstitial silicon, can cause the precipitation of ZrSiO 4 : the interstitial silicon can indeed diffuse and dissolve into crystalline ZrO 2 until the solubility limit is reached. The formation of this phase, called zircon (23), has been reported by several authors (13,23,(25)(26)(27)(29)(30)(31)(32).…”

“…The oxidation behavior of Si-SiC-ZrB 2 materials were then compared with those of pressureless sintered SiC materials, for which the processing method has been presented in more detail elsewhere (19), and with previously investigated SiC-ZrB 2 -based composite (6,13,(20)(21)(22)(23)(24)(25)(26).…”