High-temperature (to 1600°C) oxidation of ZrB2–MoSi2 ceramics in air

Oxidation behavior and kinetics of ZrB2 containing SiC chopped fibers

“…During heating, Fig. 2a, after a rapid mass increase in the first 10 min, a slower increase occurs with temperature up to 800 • C, then a slightly higher increase is observed between 800 and 1200 • C, followed by a new increase at higher rate for temperatures above 1200 • C. According to similar profiles observed for other ZrB 2 -based materials [30], air oxygen is chemisorbed on the surface of the sample and then adsorption-desorption equilibrium is reached at around 200 • C, Fig. 2a.…”

Formation of a Tribofilm in the Surface Layer of Al–Ti–Cr–N–B Magnetron Coating on Boron Nitride During Turning of Hardened Steel

“…Similar changes in the concentration of elements with the thickness of the surface layer can also be seen in (i) abrasive and fretting wear in air of spark and laser-spark coatings based on titanium alloys [15,16], (ii) hightemperature oxidation at high-speed heating [17], (iii) electrochemical oxidation of the surfaces [18,19], (iv) and formation of spark coatings [15]. Figure 7 shows, as an example, the variation in the concentration of elements with depth during abrasive and fretting wear in air.…”

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

“…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).…”