摘要
高温合金微晶涂层（晶粒尺寸＜1μm）是最近发展起来的一种全新的高温合金防护涂层。与传统的扩散型铝化物涂层、MCrAlY包覆涂层及YO3稳定的ZrO2陶瓷涂层（它们的特点是涂层与基体是由不同材料组成）完全不同，它可以采用与基体合金成分完全相同的微晶化合金进行自防护。这种涂层不仅具有良好的抗静态与循环氧化性能，而且与基体具有良好的相容性，从而避免了传统涂层由于长期使用后，涂层与基体间的互扩散引起的孔洞及形成的有害相等。
The microcrystallized superalloy coating(grain size< 1μm) has bo developed as an entirely new tpe of high temperature coating, which is quite diffrent from the well known traditional coatings, e.g.aluminide, MCrAlY overlay and ceramic thermal barrier coatings, Which are foreign materials to the Protected substrates. However, corresponding to the new concept, the coating can be produced by means of magnetron sputtering technique,with an alloy targe with the same or similar chemichal composition as the substrate to be protected, therefore, such a coating exhibits excellent compatibility to the substrate, so tha any harmful effects induced by the possible interdiffusion between the foreign coating and the substrate during long term service can be avoided. It has been proved that the microcrystalline alloy coatings show isothermal and cyclic oxidation resistance much superior to original cast alloys for some studied aluminan and chromia formers. It is believed tha the new concept of coating may be applied to proper alloy systems. In this paper, the progress made in the study of high temperature microcrystalline coating was reviewed.
出处
《真空科学与技术》
CSCD
1994年第4期287-293,共7页
Vacuum Science and Technology
关键词
溅射
高温涂层
微晶
氧化
高温合金
Sputtering,High temperature coating,Microcrystalline, Oxidation
