Hot corrosion behavior was evaluated by gadolinium monosilicate (Gd₂SiO₅) with volcanic ash for environmental barrier coatings (EBCs). Sintered Gd₂SiO₅ was prepared by the spark plasma sintering (SPS) method at 1400 °C for 20 min, and high-temperature corrosion resistance against of volcanic ash was evaluated at 1400 °C for 2 h, 12 h, and 48 h. The surface region of sintered Gd₂SiO₅ was partially dissolved in molten volcanic ash, creating a chemically reacted area. The formation of the elongated morphology of Ca₂Gd₈(SiO₄)₆O₂ grains observed in the reaction area is thicker with increasing heat-treatment time as the volcanic ash dissolves. In addition, high-temperature X-ray diffraction was carried out to identify the dynamics of phase evaluation in the volcanic ash and Gd₂SiO₅. According to the results, corrosion occurs due to reaction of the Gd₂SiO₅ phase and the Ca component of volcanic ash at 1300 °C, and the Ca₂Gd₈(SiO₄)₆O₂ phase is generated.

通过具有火山灰的单硅酸g（Gd ₂ SiO ₅）评估了热腐蚀行为，用于环境屏障涂料（EBC）。通过火花等离子体烧结（SPS）方法在1400°C下20 min制备烧结的Gd ₂ SiO ₅，并在1400°C下评估2 h，12 h和48 h的耐火山灰的高温腐蚀性能。烧结的Gd ₂ SiO ₅的表面部分溶解在熔融的火山灰中，形成化学反应区域。Ca ₂ Gd ₈（SiO ₄）₆ O ₂的伸长形态的形成随着火山灰的溶解，随着热处理时间的增加，在反应区域观察到的晶粒变厚。另外，进行了高温X射线衍射，以鉴定火山灰和Gd ₂ SiO _5中的相评价动力学。根据该结果，由于Gd ₂ SiO ₅相与火山灰的Ca成分在1300℃下的反应而发生腐蚀，生成Ca ₂ Gd ₈（SiO ₄）₆ O ₂相。