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    • 8. 发明申请
    • PROTECTIVE LAYER FOR PROTECTING PARTS AGAINST CORROSION, OXIDATION AND EXCESSIVE THERMAL STRESSES, AS WELL AS PROCESS FOR PRODUCING THE SAME
    • 保护层用于保护COMPONENT对抗腐蚀性,氧化和热应力及其制备方法
    • WO1996012049A1
    • 1996-04-25
    • PCT/EP1995003919
    • 1995-10-04
    • SIEMENS AKTIENGESELLSCHAFTSCHMITZ, FriedhelmCZECH, Norbert
    • SIEMENS AKTIENGESELLSCHAFT
    • C23C04/02
    • C23C28/321C23C4/02C23C28/00C23C28/3455Y02T50/67Y10S428/937Y10S428/938Y10T428/12618Y10T428/12931
    • A protective layer is disclosed for protecting parts against corrosion and oxidation at high temperatures and against excessive thermal stresses. The protective layer has a heat-insulating layer made of a ceramic material and an adhesive layer made of a rhenium-containing metal alloy. The metal alloy is one of the alloys described by the generic term MCrAlY, in which M stands for cobalt and/or nickel and Y stands for yttrium and/or at least an equivalent metal from the group that comprises scandium and rare earth elements. The protective layer is characterised by a high oxidation and corrosion resistance of the alloy, by remarkable thermal fatigue resistance properties and by an effective and durable connection between alloy and ceramic heat-insulating layer. Thanks to this heat insulation, the outer face of the protective layer may be exposed to a considerably higher temperature in comparison with purely metallic protective layers without exposing the protected parts to an increased thermal stress. The protective layer is thus particularly suitable for parts of a gas turbine exposed to overheated flue gas, for example guide blades, moving blades or thermal shields.
    • 本发明涉及的保护层用于在高温和从过度的热应力保护免受腐蚀和氧化的成分。 它包括一个陶瓷材料的热绝缘层和由含铼的金属合金的粘合层。 该金属合金属于由集体术语的MCrAlY合金覆盖的场,其中M为钴和/或镍和Y表示钇和/或至少一个当量的金属包括钪和稀土类元素是选自。 所述保护层的特征在于高氧化和优异的热疲劳特性的合金的耐腐蚀性和合金和陶瓷热障涂层之间的有效和持久的连接。 作为热绝缘体的结果可以被设置在保护层,以纯金属的保护层的外侧显着更高的温度,而不增加的热负载施加到该组件。 因此,保护​​层是特别适合于燃气涡轮机的部件,其被暴露于热的烟道气,例如 用于转子叶片或热屏蔽件的叶片。