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目前陶瓷绝热发动机的研究方案主要有:用陶瓷材料制造燃烧室周围的整体零件;在燃烧室周围镶嵌陶瓷隔热层;在燃烧室表面上喷涂陶瓷材料。由于陶瓷为粒状材料,不论用何种方式烧结成零件,其内部都存在无数微观裂纹,并在机械应力或热应力作用下会迅速扩大,致使零件断裂。在陶瓷零件探伤和机械加工的难题尚未解决前,陶瓷零件或陶瓷镶块的发动机尚不能得到应用。然而,等离子喷涂技术已较成熟,研制陶瓷喷涂燃烧室是可行的。
At present, the research program of ceramic adiabatic engines mainly includes the following: making the whole parts around the combustion chamber with ceramic materials; setting ceramic thermal insulation around the combustion chamber; and spraying the ceramic material on the surface of the combustion chamber. Because ceramic is a granular material, no matter what method of sintering into parts, there are countless micro-cracks in the internal and mechanical stress or thermal stress will rapidly expand, resulting in broken parts. In the ceramic parts testing and machining problems have not yet been solved, the ceramic parts or ceramic inserts of the engine still can not be applied. However, plasma spraying technology has been more mature, the development of ceramic spray combustion chamber is feasible.