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Advanced bond coat materials for tbc with improved thermal cyclic fatigue and sulfidation resistance

A bonding coating and thermal barrier coating technology, which is applied in coating, metal material coating process, welding/cutting medium/material, etc., can solve the problems that cannot improve the oxidation corrosion resistance and deterioration of CoCrAlY alloy

Pending Publication Date: 2021-09-21
오를리콘메트코유에스아이엔씨
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, according to McComas et al., although superior to W and Mo for oxidation corrosion resistance, as a refractory metal Ta cannot at best improve the oxidation corrosion resistance of CoCrAlY alloys and most likely make its deterioration

Method used

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  • Advanced bond coat materials for tbc with improved thermal cyclic fatigue and sulfidation resistance
  • Advanced bond coat materials for tbc with improved thermal cyclic fatigue and sulfidation resistance
  • Advanced bond coat materials for tbc with improved thermal cyclic fatigue and sulfidation resistance

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Embodiment

[0068] The compositions of the three inventive nickel-based alloy samples and the comparative or baseline cobalt-based alloy sample Diamalloy® 4700 (bond coat material) used to make bond coats for coated substrates are shown in Table 1 . The materials listed in Table 1 were sprayed onto Hastelloy X substrates by the High Velocity Oxygen Fuel Spray method (HVOF method) to form four different bond coats. As disclosed by Wolfa et al., Hastelloy® X has the following nominal composition: 22.0 wt % chromium, 9.0 wt % molybdenum, 18.5 wt % iron, 1.5 wt % cobalt, 0.6 wt % tungsten, 1.0 wt % Silicon, 1.0% by weight of manganese, 0.1% by weight of carbon, and the balance of nickel. Then, 7% by weight of Y 2 o 3 The same top coat (TBC) of partially stabilized ZrO2 (Amdry® 204NS-1 manufactured by Oerlikon Metco) was air plasma sprayed onto the bond coat to form four different TBC systems, named comparative TBC- D4700, TBC Example 1, TBC Example 2 and TBC Example 3.

[0069] Each synt...

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Abstract

A bond coating material providing unexpectedly high thermal cyclic fatigue resistance and sulfidation resistance, and unexpectedly prolonged thermal cycle life in high temperature environments of gas turbine engine components with and without the presence of sulfur contains: a) 10% to 30% by weight chromium, b) at least one of tantalum and molybdenum in a total amount of 3% to 15% by weight, c) 5% to 13% by weight aluminum, d) 0.1% to 1.4% by weight silicon, e) 0.1% to 0.8% by weight yttrium, f) 0% to 1.2% by weight carbon, g) 0% to 1% by weight dysprosium, h) 0% to 1% by weight cerium, i) the balance being nickel, and the percentages of a) to i) adding up to 100% by weight. The total amount of tantalum and molybdenum, and the amounts of aluminum and silicon are each critical for avoiding delamination of a top coat from a bond coat.

Description

technical field [0001] The present invention relates to advanced bond coat materials for thermal barrier coatings (TBC) having improved thermal cycle fatigue resistance and sulfidation resistance. The advanced bond coat materials can be in powder, alloy, bond coat or coating form and can be used in thermal spray powder form with top coat materials to obtain thermal barrier coatings layer (TBC) system. The present invention also relates to methods for reducing delamination of topcoats from substrates, such as gas turbine engine components. Background technique [0002] A complete thermal barrier coating system includes a top coat such as a thermal barrier coating (TBC) and a bond coat or tie coat. Common bond coats are made of MCrAlY alloys, where M represents Ni, Co, Fe or combinations thereof. In order to improve the performance of the bond coating, Hf, Re and Pt and various other rare earth elements are usually added to the advanced bond coating. Ordinary top coats are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C23C4/073C23C30/00F01D5/28
CPCC23C30/00C23C4/073F01D5/288C22C19/051C22C30/00C23C4/18C23C4/12C23C4/129C23C4/134C23C28/30C23C28/3215C23C28/3455C23C4/131C22C1/0433B22F5/009B22F5/04B22F7/08B23K35/3066B23K35/0244B23K35/0227C22C19/055C23C4/11C04B35/48C04B35/62222C04B2235/3217C04B2235/3246C04B2235/9669
Inventor J·何T·沙罗本B·克耶斯D·陈
Owner 오를리콘메트코유에스아이엔씨