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Cr-O-N active diffusion blocking layer and production method thereof

A barrier layer, active technology, applied in coatings, mechanical equipment, metal material coating processes, etc., to achieve the effects of low preparation cost, strong operability, and improved anti-oxidation performance

Inactive Publication Date: 2008-12-03
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, the use of arc ion plating technology to prepare Cr-O-N film as a diffusion barrier has not been reported

Method used

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  • Cr-O-N active diffusion blocking layer and production method thereof
  • Cr-O-N active diffusion blocking layer and production method thereof
  • Cr-O-N active diffusion blocking layer and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The base material is superalloy DSM11, the sample size is 15mm×10mm×2mm, and the target is pure chromium target. Grinding, sandblasting and cleaning the substrate before ion plating, and grinding the prepared sample to 1000 with metallographic sandpaper # ; Use glass balls with a particle size of 60-200 mesh to sandblast the sample under 2-5 atmospheres; during the sandblasting process, keep the spray gun at an angle of 70-80 degrees to the surface of the sample; after sandblasting, use absolute alcohol , Ultrasonic cleaning of the sample with distilled water. After the sample is loaded into the furnace, the sample chamber is pumped to 6.0×10 -3 Pa, into the Ar gas to a pressure of 7 × 10 -2 Pa, bombard the surface of the substrate with a bias voltage of -1000V for 4 minutes, the arc current is 60-70A, and the arc voltage is 20-30V; are 110, 20 and 0 sccm, the pulse bias is -300V, the duty cycle is 30%, the deposition time is 0.5h, and the thickness of the diffusion ...

Embodiment 2

[0029] The base material is superalloy DSM11, the sample size is 15mm×10mm×2mm, and the target is pure chromium target. The base material is ground, sand blasted and cleaned before ion coating. After the sample is loaded into the furnace, the sample chamber is pumped to 6.0×10 -3 Pa, through Ar gas to a pressure of 2×10 -1 Pa, bombard the surface of the substrate at the bias voltage of -800 and -600V for 3min and 2min respectively, the arc current is 50-80A, and the arc voltage is 10-40V; , the corresponding nitrogen flow rate is 226, 144 and 62sccm, and the working pressure is 6×10 -1 Pa, the pulse bias voltage is -150V, the duty ratio is 20-30%, the deposition time is 35-45min, and the prepared barrier layer has a thickness of 1-2 μm. Use arc ion plating equipment to deposit a Ni-30Cr-8Al-0.5Y (wt.%) coating with a thickness of about 30 to 50 μm on the barrier layer. The specific process parameters are that the Ar gas pressure is 3×10 -1 Pa, bias voltage -150~-250V, arc ...

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Abstract

The invention relates to a coating technology, in particular to a Cr-O-N activated diffusion impervious layer. An arc ion plating technology is adopted, pure chrome is used as target material, the impervious layer which can effectively reduce the mutual diffusion of metal elements between a coating and a high-temperature alloy matrix under high-temperature oxidation conditions through controlling the flow quantity of O2 and N2 during the reaction process; a MCrAlY coating is deposited on the impervious layer to be used as an oxidation resistant coating. The referred Cr-O-N activated diffusion impervious layer has compact structure, combines well with the matrix, has simple and low preparation cost, and is a good diffusion impervious layer. The Cr-O-N activated diffusion impervious layer is applied to the matrixes that are nickel-base, cobalt-base or ferrum-base high-temperature alloys.

Description

technical field [0001] The invention relates to a high-temperature oxidation coating technology, in particular to a Cr-O-N active diffusion barrier layer of a high-temperature oxidation coating and a preparation method thereof. Background technique [0002] Gas turbines have been widely used in industries, aviation and ships. In order to improve the efficiency of the engine and ensure the reliable operation of the gas turbine blades made of nickel-based superalloys, it is an economical and effective way to use high-temperature oxidation-resistant coating MCrAlY. Related documents such as: ① Chinese invention patent, a method for preparing thermal barrier coatings by explosive spraying, application number 01133423.1; ② Chinese invention patent, an oxidation-resistant thermal barrier coating and its preparation method, application number 02133193.6; ③ China Invention patent, a preparation method of thermal shock resistant thermal barrier coating, application number 03133344.3...

Claims

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Application Information

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IPC IPC(8): C23F15/00C23C14/22C23C14/54C23C14/06C23C14/02F01D5/28
Inventor 孙超李伟洲王启民姚勇鲍泽斌刘山川宫骏闻立时
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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