Amorphous phase is commonly found in plasma-sprayed LaMgAl₁₁O₁₉ coating. In this work, LaMgAl₁₁O₁₉ coatings were deposited by atmospheric plasma spraying with powders synthesized at the temperatures range from 1300°C to 1600°C. The melting degree of the feedstock was influenced by the amount of the second phase LaAlO₃ and density of the powders, which was dependent on the synthesis temperature. Therefore, LaMgAl₁₁O₁₉ coatings with different amorphous phase contents and microstructures were produced. Results showed that the lower the amorphous contents, the lower the volume shrinkage of the coating during the recrystallization process and the longer the thermal cycling lifetime. However, when the amorphous contents were in the same level, the thermal cycling lifetime differences of these coatings seemed to be dependent on the grain size. LMA coating sprayed with powders synthesized at 1450°C had relatively low amorphous content and moderate grain size, showing the longest thermal cycling lifetime.

非晶相通常在等离子喷涂LaMgAl ₁₁ O ₁₉涂层中发现。在这项工作中，通过在1300°C至1600°C的温度范围内合成的粉末通过大气等离子喷涂沉积LaMgAlAl ₁₁ O ₁₉涂层。原料的熔融度受第二相LaAlO ₃的量和粉末密度的影响，这取决于合成温度。因此，LaMgAl ₁₁ O ₁₉产生具有不同非晶相含量和微结构的涂层。结果表明，非晶含量越低，涂层在重结晶过程中的体积收缩越小，热循环寿命越长。然而，当无定形含量在相同水平时，这些涂层的热循环寿命差异似乎取决于晶粒尺寸。用1450°C合成粉末喷涂的LMA涂层具有相对较低的无定形含量和中等粒度，显示出最长的热循环寿命。