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In-situ preparation method of alloy coating reinforced through dispersion of microcrystalline oxide particles

A technology of oxide particles and dispersion strengthening, which is applied in metal material coating process, coating, molten spraying, etc., can solve the problems of low coating adhesion, agglomeration of oxide particles, poor controllability, etc., and achieve the goal of coating The effect of compact structure, controllable size and significant cost advantage

Active Publication Date: 2017-01-04
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to solve the problems of poor controllability in the preparation of the current oxide particle dispersion strengthened alloy coating, low coating binding force and agglomeration of oxide particles, and the principle of the microcrystalline oxide particle dispersion strengthened alloy coating provided bit preparation method

Method used

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  • In-situ preparation method of alloy coating reinforced through dispersion of microcrystalline oxide particles

Examples

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Effect test

Embodiment 1

[0024] This example illustrates the preparation method of the NiCo-based alloy coating strengthened by CrAlYSiHf oxide particle dispersion. First, install the NiCoCrAlYSiHf (Ni-25Co-25Cr-10Al-0.5Y-0.5Hf-1Si mass percent wt%) target on the cathode water-cooled target sleeve, hang the substrate test piece in front of the target, close the vacuum chamber door, and pump air; The vacuum degree of the coating chamber reaches 9×10 -3 When Pa or higher, feed oxygen to maintain the pressure of the vacuum chamber at 2×10 -2 Pa, ignite the cathode arc; apply a pulsed negative bias to the substrate for coating. The selection of the bias voltage amplitude is based on the density and bonding force of the deposited coating. The density and bonding force of the coating are slightly lower at 10-200V, but the deposition rate is less affected by the bias voltage, and the bias voltage of 400-800V can Increase the density and bonding force of the coating, but due to the effect of sputtering, the...

Embodiment 2

[0027] This example illustrates the preparation method of the aluminum oxide particle dispersion strengthened copper coating. First, install the copper-aluminum alloy (Cu-20Al, mass percent wt%) target on the cathode water-cooled target sleeve, hang the substrate test piece in front of the target, close the vacuum chamber door, and perform air extraction; the vacuum degree of the coating chamber reaches 9×10 -3 When Pa or higher, feed oxygen to maintain the pressure of the vacuum chamber at 6×10 -2 Pa, ignite the cathode arc; apply pulse negative bias voltage 200V to the substrate for coating. The magnitude of the arc current can affect the deposition rate of the coating, and the deposition rate is roughly linear with the magnitude of the current. In this example, 200A DC current is used. The pulse negative bias voltage applied to the substrate has a frequency of 5 kHz and a duty cycle of 60%. Then, put the coated test piece into the vacuum annealing furnace and evacuate to ...

Embodiment 3

[0029] This example illustrates the preparation method of the nickel coating strengthened by the dispersion of chromium oxide particles. First, install the nickel-chromium alloy (Ni20-60Cr, mass percentage wt%) target on the cathode water-cooled target sleeve, hang the substrate test piece in front of the target, close the vacuum chamber door, and perform air extraction; the vacuum degree of the coating chamber reaches 9×10 -3 When Pa or higher, feed oxygen to maintain the pressure of the vacuum chamber at 2×10 -2 -6×10 -2 Pa, ignite the cathodic arc; apply a pulse negative bias voltage of 50-200V to the substrate for coating, and the target with high chromium content can use a higher amplitude bias voltage. The magnitude of the arc current affects the deposition rate of the coating, and the deposition rate is roughly linear with the magnitude of the current. In this example, 100A DC current is used. The pulse negative bias voltage applied to the substrate has a frequency of...

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Abstract

The invention relates to an in-situ preparation method of an alloy coating reinforced through dispersion of microcrystalline oxide particles, and belongs to the technical field of a coating. The method can be used for preparing an anti-corrosion wear-resistant coating and an electrical-conductive anti-ablation coating of a contact material. The alloy coating contains a low-aerobic component including copper, iron, nickel, cobalt or a combination thereof and a high-aerobic component including chromium, aluminium, zirconium, titanium, silicon and rare earth aerobic elements such as yttrium, lanthanum, dysprosium, and cerium or a combination thereof. The components are smelted or subjected to hot press sintering to prepare an arc ion plating target material, the arc ion plating target material is deposited in a low-oxygen-partial-pressure atmosphere to obtain a precursor coating; annealing is performed in a vacuum or inert atmosphere; and oxygen adsorbed and solid-dissolved in the coating and high-aerobic elements undergo an in-situ reaction to form a composite coating with nanometer / submicron oxide particles dispersed in a metal matrix. Through utilization of the advantages of arc ion plating, the prepared coating is dense in texture and the size of oxide particles is controllable. The technology is high in stability, low in cost and suitable for industrial application.

Description

technical field [0001] The invention relates to coating technology, and in particular provides an in-situ preparation method of microcrystalline oxide particle dispersion strengthening alloy coating. Background technique [0002] Oxide particle dispersion strengthened alloy, or ODS (oxide dispersionstrengthened), has the characteristics of high hardness, wear resistance, and erosion resistance. As a coating, it can effectively protect the matrix alloy from damage in complex environments. Layers, wear-resistant coatings, contact materials resistant to arc ablation and many other fields have broad application prospects. [See literature: Pang Hongmei, Qi Huibin, He Yedong, Wang Deren, Li Zhengwei, Microcrystalline Ni-20Cr-Y deposited by high frequency pulse 2 o 3 ODS alloy coating, Chinese Science B, 30, 2000. Pang Hongmei, Qi Huibin, He Yedong, Wang Deren, MA956ODS alloy microcrystalline coating on the improvement of oxidation performance of 1Cr18Ni8Ti stainless steel, Journ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/12C23C4/06
Inventor 沈明礼朱圣龙赵盼盼王世臣王福会
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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