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Anti-cavitation corrosion-resistant metal-ceramic matrix composite material and preparation method thereof

A composite material and ceramic material technology, applied in the field of metal-ceramic composite material preparation, can solve problems such as uncoated corrosion resistance research, improve cavitation resistance and corrosion resistance, prolong service time, and reduce processing costs. Effect

Active Publication Date: 2022-03-22
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The Chinese patent literature with publication number CN110699626A discloses a laser remelting method for cavitation-resistant thermal sprayed cermet coatings. The thermal spraying is plasma spraying or supersonic flame spraying, and the prepared coating has very Good cavitation resistance, the Chinese patent document with the publication number CN110699682A discloses a method for preparing an anti-cavitation coating using a composite process of cold spraying and laser remelting, which can deposit a layer on the substrate by using cold spraying technology The thicker metal-ceramic composite coating, and then using the coating after laser remelting treatment and the coating after cold spraying to form a transition layer, the prepared coating also has very good cavitation resistance, but the above two inventions are not The corrosion resistance of the coating was not studied

Method used

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  • Anti-cavitation corrosion-resistant metal-ceramic matrix composite material and preparation method thereof
  • Anti-cavitation corrosion-resistant metal-ceramic matrix composite material and preparation method thereof
  • Anti-cavitation corrosion-resistant metal-ceramic matrix composite material and preparation method thereof

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Embodiment 1

[0034] In this embodiment, the metal material is nickel powder, the ceramic material is tungsten carbide powder, and the rare earth material is cerium oxide powder. The steps of preparing the cavitation-resistant and corrosion-resistant metal-ceramic matrix composite material include:

[0035] (1) Mix nickel powder and tungsten carbide powder at a volume ratio of 70±5% and 30±5% (the required mass can be calculated by theoretical density), and then add 2±0.5% of the total mass of nickel powder and tungsten carbide powder Cerium oxide powder, mixed evenly, then poured into molds;

[0036] (2) Send the mold into a vacuum sintering furnace, fully sinter the powder under a pressure of 40 MPa and a temperature of 1200°C for 1 hour; then cool naturally, and take out the formed composite preform;

[0037](3) Clean the prefabricated part of step (2) with ethanol. After drying, use 60 mesh brown corundum sand to roughen its surface. The air pressure of sandblasting is 1MPa, and the san...

Embodiment 2

[0040] In this embodiment, the metal material is block nickel and flake chromium, the ceramic material is tungsten carbide powder, and the rare earth material is lanthanum oxide powder. The steps of preparing the cavitation-resistant and corrosion-resistant metal-ceramic matrix composite material include:

[0041] (1) Mix block nickel, flake chromium and tungsten carbide powder according to the volume ratio of 15±5%, 55±5%, 30±5%, and then add the total mass of block nickel, flake chromium and tungsten carbide powder 3±1% lanthanum oxide powder, mixed evenly, then poured into the crucible of the vacuum induction melting furnace for heating;

[0042] (2) When the temperature reaches 2400°C, keep it for 3 minutes, then pour the molten material in the crucible into the copper mold, and after it is completely cooled, take out the formed composite preform;

[0043] (3) Clean the prefabricated part of step (2) with ethanol. After drying, use 60 mesh brown corundum sand to roughen it...

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Abstract

The invention discloses a preparation method of an anti-cavitation corrosion-resistant metal-ceramic matrix composite material. The preparation method comprises the following steps: (1) preparing a composite prefabricated part by taking a metal material, a ceramic material and a rare earth material as raw materials; in the composite prefabricated part, the volume ratio of the metal phase to the ceramic phase is (5-95): (95-5); the addition amount of the rare earth material is 0.1-10% of the total mass of the metal material and the ceramic material; and (2) carrying out laser remelting treatment on the composite prefabricated part prepared in the step (1). Due to introduction of the rare earth material, the melting point of the metal-ceramic matrix composite material is reduced, meanwhile, the laser absorptivity of the material is improved, and the cavitation erosion resistance and corrosion resistance of the metal-ceramic matrix composite material are improved. In addition, the metal material, the ceramic and the rare earth material can play a synergistic role in the cavitation erosion-corrosion environment, so that the prepared metal-ceramic based composite material has excellent cavitation erosion resistance and corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of preparation of metal-ceramic composite materials, in particular to a cavitation-resistant and corrosion-resistant metal-ceramic matrix composite material and a preparation method thereof. Background technique [0002] Cavitation, or cavitation, is a phenomenon in which vapor bubbles are produced due to a decrease in local pressure due to a decrease in the saturated vapor pressure due to a fluid flow rate that is too fast. This phenomenon is common in flow-passing components such as propellers and water turbines. The collapse of the cavitation will generate microjets and shock waves with extremely high energy density. When these micro jets and shock waves continuously bombard the surface of the material, the stress will gradually accumulate, causing the material to undergo plastic deformation and eventually lead to the peeling of the material. The material wear caused by the micro-jet and shock wave thro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C32/00C22C19/03C22C27/06C22C29/12C22C29/02C21D10/00C22F3/00
CPCC22C32/0047C22C19/03C22C27/06C22C29/12C22C29/02C22C29/005C21D10/00C22F3/00C22C32/0005
Inventor 陈秀勇杨睿田野黄能良黄晶刘晓梅张波涛周平淡焱鑫吴双杰刘奕凤晓华李华
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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