Testing of the Oxidation Resistance of MgAlON Materials with Non-isothermal Oxidation Method

Abstract

weight gain per unit area, The initial oxidation temperatures and the maximum oxidation rate temperatures, MgAlON.Abstract. In order to establish a standardized testing method for the oxidation resistance of refractory materials, one of their most important properties, China national standard GB/T 32329-2015 has been issued in 2015, which title is "Test method for oxidation resistance of oxynitride materials-non-isothermal oxidation". GB/T 32329-2015 provides a standard characterizing method for oxidation resistance. In this paper we validate this standard through testing the oxidation resistance of six MgAlON samples with the non-isothermal oxidation method described in this standard. We conclude that the oxidation resistance property of MgAlON materials could be well described with these indicators: the oxidation weight gain per unit area, the initial oxidation temperatures and the maximum oxidation rate temperatures. Our experiments show that this method is scientific and feasible.

Y2O3 ve Er2O3-katkılı α/β/-SiAlON Seramiklerinin Oksidasyon Davranışları

“…Although the starting oxidation temperature of Y-S was lower, the weight gain rate was also lower for this sample with increasing temperature due to its lower slope in comparison to Er-S composition. The maximum value of the slope shows the temperature at which the oxidation rate is the highest [14,15]. These temperatures were obtained from the peak of derivative curves and were found close to each other as 1385 and 1380°C for Y-S and Er-S compositions, respectively.…”

“…The oxidation behavior of Y and Er-doped SiAlON ceramics was examined by the weight change resulted by the oxidation reactions and a standard test method, the details of which was given in [14] and [15], was used to compare the oxidation resistance of these ceramics, quantitatively. Figure 2 shows the weight change curves (Δm/m0×100) of the Y-S and Er-S compositions as a function of oxidation temperature and the first order derivative of these curves (d(Δm/m0×100)/dT), which indicate the temperature at which the oxidation rate is maximum.…”