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本文介绍了氧化铝熔化颗粒（即熔滴），在不同预热温度下的光滑或喷砂不锈钢基体上的扁平化行为。与扁平化熔滴作用的喷砂表面粗糙度限于Ra=1．47m。除了测试熔滴扁平化和熔滴冷却性能外，还测试了在相同基体上微米级氧化铝熔滴的润湿性能。转变温度Tt在光滑和粗糙表面显示出差别。对于光滑表面而言，Tt为170℃，在200℃获得了100％的盘状扁平粒子。而对于粗糙表面，Tt接近于300℃时，扁平粒子为多孔状，而在450℃时变得接近于致密。温度靠近熔点时，氧化铝的润湿性不随基体预氧化而变化，这与在等离子喷涂时温度远高于熔点的情况不同。“,”With high performance gas turbine engine increased demand for long life thermal barrier coatings, the research interest was focused on improvement thermal barrier coatings life. In this paper, the development and research statues of bond coat composition, structure design and top coat deposition technology for long life thermal barrier coatings was introduced. The research direction and focus of long life thermal barrier coatings deposited by low cost technologies was also anticipated.