JPWO2022128144A5

JPWO2022128144A5 -

Info

Publication number: JPWO2022128144A5
Application number: JP2023536142A
Authority: JP
Publication date: 2024-06-03

Description

異なるターゲット材料および反応性ガスを使用することによって、接合層および／または母材ならびに酸化物、ホウ化物、炭化物もしくは窒化物などの研磨相を単一のプロセスで堆積させることができる。これらの相は、多層構造中の層として、または母材中のマクロ粒子として、導入することができる。電解堆積または電気泳動堆積に基づくブレード先端コーティングのための従来の製造プロセスとは対照的に、非常に小さい粒子または薄い層を、母材（例えば、ＭＣｒＡｌＹ材料を含み、好ましくはＭＣｒＡｌＹ材料からなる）に完全に埋め込むことができ、それによって、より深くに位置する研磨相は、たとえそれらが酸化に対して耐性ではない（これは、一部にのみ当てはまる）場合でも、その上にある母材（例えば、ＭＣｒＡｌＹ）から保護される。したがって、従来のブレード先端コーティングよりも長い耐用年数の後の接触または摩耗状況の場合でも、ライナー上のならし運転層に対するブレード先端の保護効果を達成することが可能である。 By using different target materials and reactive gases, the bonding layer and/or the base material and the abrasive phases, such as oxides, borides, carbides or nitrides, can be deposited in a single process. These phases can be introduced as layers in a multilayer structure or as macroscopic particles in the base material. In contrast to conventional manufacturing processes for blade tip coatings based on electrolytic or electrophoretic deposition, very small particles or thin layers can be completely embedded in the base material (e.g., including and preferably consisting of MCrAlY materials), whereby the abrasive phases located deeper are protected from the overlying base material (e.g., MCrAlY ), even if they are not resistant to oxidation (this is only true in part). It is therefore possible to achieve a protective effect of the blade tip against the break-in layer on the liner, even in the case of contact or wear situations after a longer service life than with conventional blade tip coatings.

Claims

1. A method of coating a substrate surrounding a gas turbine blade, comprising:
in a first step, application of an MCrAlY matrix by PVD method,
- in a further step, application of a layer by PVD method, said layer comprising at least one oxide and/or boride and/or carbide and/or nitride.

The method of claim 1, characterized in that the PVD method of the first step and/or the further step is a cathodic spark evaporation method.

The method according to claim 1 or 2, characterized in that the material source for the PVD method of the further step is an AlCr target and the coating method is a reactive method in the process in which oxygen is used.

4. The method according to claim 1, wherein the coating is carried out as a layer system comprising two layers or the coating is carried out as a layer system comprising a multi-layer alternating coating system.

1. A layer system for a gas turbine blade tip , the coating comprising at least a first layer having an MCrAlY matrix, the coating comprising at least a second layer, the second layer comprising at least one oxide and/or boride and/or carbide and/or nitride.

The layer system according to claim 5, characterized in that the coating is designed as a multi-layer coating system in which the first and second layers alternate.

A gas turbine blade having a coating system according to any one of claims 5 or 6.