High demands for higher turbine efficiency bring attention to newer and more advanced insulating materials for the high temperature components in the turbine. Yttrium aluminum garnet (YAG) has shown good insulating properties in the previous published research, such as higher temperature limitation and better resistance to calcium–magnesium–alumina–silicate environmental contaminant penetration than the more conventional yttria-stabilized zirconia systems. Whereas in literature, coatings of YAG are typically prepared by solution deposition processes, in the present work YAG powder has been prepared for more conventional thermal spraying methods. The goal is to show the potential YAG powders have as a thermal barrier coating. Different approaches for obtaining a successful deposition and a good coating have been explored. Small-sized industrial-supplied powder and larger in-house-made powder have been compared, emphasizing the importance of energy used for deposition and crystallinity in the final coating. Highly crystalline material has successfully been produced with F4 atmospheric plasma spray system without post-treatment or substrate heating.

中文翻译：

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用于大气等离子喷涂的钇铝石榴石粉原料

对更高涡轮效率的高要求促使人们关注用于涡轮中高温部件的更新和更先进的绝缘材料。钇铝石榴石 (YAG) 在之前发表的研究中显示出良好的绝缘性能，例如比更传统的氧化钇稳定氧化锆系统更高的温度限制和更好的抗钙-镁-铝-硅酸盐环境污染物渗透能力。而在文献中，YAG 涂层通常是通过溶液沉积工艺制备的，而在目前的工作中，YAG 粉末已为更传统的热喷涂方法制备。目标是展示 YAG 粉末作为热障涂层的潜力。已经探索了获得成功沉积和良好涂层的不同方法。对工业供应的小尺寸粉末和较大的自制粉末进行了比较，强调了最终涂层中用于沉积和结晶的能量的重要性。使用 F4 大气等离子喷涂系统成功生产出高结晶材料，无需后处理或基材加热。