Y_2O_3掺杂对17Ni/(NiFe_2O_4-10NiO)金属陶瓷高温氧化性能的影响

Effect of Y_2O_3 Doped on High-temperature Oxidation Performance of 17Ni /( NiFe_2O_4-10NiO) Cermet

氩气气氛保护下采用气压烧结技术制备掺杂Y2O3的17Ni/(NiFe2O4-10NiO)金属陶瓷惰性阳极,在电解温度(960℃)下,对材料进行抗高温氧化性能研究。采用SEM分析材料及氧化产物的各物相分布情况、氧化形貌,并利用XRD进行成分分析。结果表明,金属陶瓷阳极的氧化动力曲线均大致符合抛物线规律;掺杂适量的Y2O3对金属相的分散有一定作用,并能有效抑制烧结试样及氧化物的孔洞生成,从而显著改善该金属陶瓷的抗高温氧化性能,其中,当Y2O3掺杂量为0.5%时,材料抗高温氧化性能最好,30 h后单位面积氧化增重量仅为10.6591 mg/cm2。

17Ni/（NiFe2O4-10NiO） cermets inert anodes doped Y2O3 were prepared by gas pressure sintering in the argon atmosphere, the high-temperature oxidation resistant performance of cermets at electrolysis temperature （960 ℃ ） was studied. The phase distributions, components of eermets and oxide were analyzed by SEM and XRD . The results show that the oxidation kinetics lines of cermets both basically with the regularity of parabolic curve; the additions improve the dispersion distribution of the metal phase Ni, and the holes in sintered samples or oxide has been suppressed, which improve the high- temperature oxidation resistant performance of the cermets , particular 0.5% Y2O3 doped, the weight gain is 10. 6591 mg/cm^2 for 30 h.