Hf modified PtAl coating and preparation method and application thereof

A coating and modification technology, applied in the direction of coating, metal material coating process, mechanical equipment, etc., can solve the problems of complex process and low high temperature oxidation resistance of coating, and achieve simple process and good high temperature oxidation resistance. , Controllable effect

Inactive Publication Date: 2020-01-31
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the inventors of the present disclosure found that the high temperature oxidation resistance of the Hf-(Ni,Pt)Al coating prepared by this preparation process is still low, and the process is relatively complicated

Method used

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  • Hf modified PtAl coating and preparation method and application thereof
  • Hf modified PtAl coating and preparation method and application thereof
  • Hf modified PtAl coating and preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0049] This embodiment is to prepare Hf-modified PtAl coatings on nickel-based superalloys, and the coating preparation process is as follows:

[0050] First, the superalloy substrate is polished and sandblasted, and the substrate is polished with 150#~800# SiC sandpaper in turn; 100~220 mesh Al 2 o 3 Sandblasting is performed to obtain a fresh surface; the substrate after sandblasting is ultrasonically treated in deionized water for 30 minutes, then in acetone for 30 minutes, and dried for use after ultrasonication.

[0051] Before electroplating Pt, first perform electrochemical degreasing on the substrate after sandblasting, activate and pre-plate Ni, and perform electrochemical degreasing in 10wt.% NaOH aqueous solution, with the substrate as the anode and the pure nickel plate as the cathode, Using 8A / dm 2 Electrochemical degreasing at a current density of 2 min; activation is carried out in a mixed solution of concentrated hydrochloric acid and deionized water accordin...

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Abstract

The invention provides an Hf modified PtAl coating and a preparation method and application thereof. The preparation method comprises the steps that a nickel layer is pre-plated on the surface of a nickel-based high-temperature alloy matrix through an electroplating method, then a platinum layer is electroplated on the surface of the nickel layer through the electroplating method, and aluminizingand hafnium plating are conducted through a chemical vapor deposition method after annealing treatment. The coating prepared through the preparation method has excellent high-temperature oxidation resistance and thermal corrosion resistance, and meanwhile the binding force of the coating and the matrix is higher.

Description

technical field [0001] The disclosure belongs to the technical field of high-temperature protective coatings, and relates to an Hf-modified PtAl coating, a preparation method and an application. Background technique [0002] The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] Turbine blades are one of the key components of advanced aero-engines. Nickel-based superalloys have excellent high-temperature mechanical properties, so they are widely used in aero-engines. In order to improve the fuel efficiency of aero-engines and obtain stronger power, the temperature at the turbine inlet end of the engine continues to increase, which puts forward higher requirements on the performance of the superalloy hot-end components. After about 80 years of development, although the high-temperature mechanical properties of superalloys have been greatly improved, at the expense of their high-temp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/12C25D5/40C25D5/50C25D3/12C25D3/50C25F1/04C23C10/30F01D5/28
CPCC23C10/30C25D3/12C25D3/50C25D5/12C25D5/40C25D5/50C25F1/04F01D5/286
Inventor 孙健肖虹李伟刘书彬傅霖兵姜肃猛
Owner QILU UNIV OF TECH
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