Al2O3掺量对Gd2(Zr0.7Ce0.3)2O7的抗CMAS性能影响
刘冰 , 王进双 , 冉世昌 , 于永生 , 燕照利
信阳师范大学学报(自然科学版) ›› 2026, Vol. 39 ›› Issue (3) : 438 -443.
Al2O3掺量对Gd2(Zr0.7Ce0.3)2O7的抗CMAS性能影响
Effect of Al2O3 doping content on CMAS corrosion resistance of Gd2(Zr0.7Ce0.3)2O7
系统研究了不同Al2O3掺量(质量分数分别为5%、10%和20%)对Gd2(Zr0.7Ce0.3)2O7陶瓷材料在1300 ℃下经10 h的CMAS(CaO-MgO-Al2O3-SiO2)热腐蚀行为的影响。采用X射线衍射仪(X-ray Diffraction,XRD)、扫描电子显微镜(Scanning Electron Microscope,SEM)和热膨胀仪等表征手段,分析了腐蚀深度、腐蚀产物类型以及Al2O3掺杂对材料热膨胀系数的影响。结果表明:随着Al2O3掺量的增加,CMAS对陶瓷块体的腐蚀反应层厚度逐渐减小;高温环境下Al2O3的掺杂促进了致密富磷灰石相(Ca2Gd8(SiO4)6O2)和镁铝尖晶石相(MgAl2O4)的形成。借助能量色散光谱仪(Energy Dispersive Spectroscopy,EDS)对样品截面区域的面扫分析表明,上述反应产物可有效阻碍CMAS熔体向陶瓷内部渗透,显著提升材料的抗腐蚀性能。
The effects of different Al2O3 doping levels (mass percent: 5%, 10% and 20%, respectively) on the CMAS (CaO-MgO-Al2O3-SiO2) corrosion behavior of Gd2(Zr0.7Ce0.3)2O7 ceramic materials at 1300 ℃ for 10 h were systematically investigated. The corrosion depth, phase composition of corrosion products, and the influence of Al2O3 doping on the thermal expansion coefficient were analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermal dilatometry. The results showed that, with increasing Al2O3 content, the thickness of the CMAS-induced reaction layer gradually decreased. The doping of Al2O3 promoted the formation of a dense apatite phase (Ca2Gd8(SiO4)6O2) and a magnesium-aluminum spinel phase (MgAl2O4) under high-temperature conditions. Energy-dispersive spectroscopy (EDS) mapping of cross-sectional areas confirmed that these reaction products effectively inhibited the penetration of molten CMAS into the ceramic interior, significantly enhancing the corrosion resistance of the material.
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国家自然科学基金项目(51902279)
河南省科技攻关项目(252102230139)
河南省科技攻关项目(252102210196)
河南省科技攻关项目(242102320376)
信阳师范大学“南湖学者奖励计划”青年项目
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