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Method for reactive spraying preparation of ceramic solid solution-based ceramic-metal eutectic nanometer composite coating

A nanocomposite coating and solid solution technology, which is applied in the direction of metal material coating process, coating, fusion spraying, etc.

Active Publication Date: 2015-07-08
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention is aimed at the following problems in the ceramic-based ceramic / metal composite coating prepared by the solid-solid reaction thermal spraying method: 1) the compound feeding material is not mixed Insufficient reaction, complex composition of reaction phase, and large fluctuations in coating performance; 2) The composition of the matrix ceramic phase cannot be adjusted; 3) Due to the poor wettability and non-simultaneous crystallization of the metal phase and the matrix ceramic phase, the metal Phases are easy to aggregate and grow, resulting in uneven distribution of metal phases, difficult to control shape and size, and difficult to achieve nanoscale particle size

Method used

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  • Method for reactive spraying preparation of ceramic solid solution-based ceramic-metal eutectic nanometer composite coating
  • Method for reactive spraying preparation of ceramic solid solution-based ceramic-metal eutectic nanometer composite coating
  • Method for reactive spraying preparation of ceramic solid solution-based ceramic-metal eutectic nanometer composite coating

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] The first step, raw materials and configuration of composite powder

[0062] Selection of raw material powder: commercial Al powder for spraying, particle size 6μm; commercial (industrial or reagent) Cr 2 o 3 powder, submicron particle size; commercial ultrafine Al 2 o 3 Spray powder, average particle size 6μm; ultra-fine commercial CeO 2 Powder, particle size 100-150nm.

[0063] Configuration of raw materials: first Cr 2 o 3 Al powder and Al powder were configured into the original reaction system at a mass ratio of 3:1; based on the original reaction system, 1.5 times the mass ratio of (Cr 2 o 3 +Al 2 o 3 +CeO 2 ) additives, Al in additives 2 o 3 : Cr 2 o 3 =2:3 (mass ratio), CeO 2 The addition amount of is 1.0wt% of additive.

[0064] The second step, the preparation of composite powder

[0065] Wet depolymerization - prepare deionized water according to the ratio of solid content 50Wt%; prepare various solid powders Cr 2 o 3 (Referring to all Cr i...

Embodiment 2

[0076] The first step, the preparation of composite powder

[0077] Selection of raw material powder: commercial Al powder for spraying, particle size 9μm; commercial (industrial or reagent) Cr 2 o 3 powder, submicron particle size; commercial ultrafine Al 2 o 3 Spray powder, average particle size 10μm; ultrafine commercial NdO 2 Powder, particle size 100-150nm.

[0078] Configuration of raw materials: first Cr 2 o 3 powder and Al powder according to the mass ratio of 3:1 to prepare the original reaction system powder; based on the original reaction system powder, add 1.8 times (Cr 2 o 3 +Al 2 o 3 +NdO 2 ) additives, NdO in additives 2 The addition amount of 1.5wt%, Al 2 o 3 : Cr 2 o 3 =1:1.

[0079] The second step, the preparation of composite powder

[0080] Wet depolymerization—prepare deionized water according to the ratio of 50% of the total solid-liquid; the prepared Cr 2 o 3 、Al 2 o 3 , NdO 2 The powder was added with deionized water and a dispers...

Embodiment 3

[0090] The first step, the preparation of composite powder

[0091] Selection of raw material powder: commercial Al powder for spraying, particle size 9μm; commercial (industrial or reagent) Cr 2 o 3 powder, submicron particle size; commercial ultrafine Al 2 o 3 Spray powder, average particle size 12μm, commercial ultrafine CeO 2 Powder, the particle size is 150-200 nanometers.

[0092] Configuration of raw materials: first Cr 2 o 3 Powder and Al powder are prepared according to the mass ratio of 3:1; add 2.1 times (Cr 2 o 3 +Al 2 o 3 +CeO 2 ) additives, Al in additives 2 o 3 : Cr 2 o 3 =1:2 (mass ratio), CeO 2 The addition amount of is 2.0wt%.

[0093] The second step, the preparation of composite powder

[0094] Wet depolymerization - prepare deionized water according to the ratio of 40wt% of the total solid-liquid; 2 o 3 、Al 2 o 3 , CeO 2 The powder is divided into different containers, and deionized water and a dispersant with a solid content of 0.8wt...

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Abstract

The invention discloses a method for reactive spraying preparation of a ceramic solid solution-based ceramic-metal eutectic nanometer composite coating. The method comprises the following steps of 1, raw material powder preparation: selecting raw materials for reactive spraying preparation of the ceramic solid solution-based ceramic-metal eutectic nanometer composite coating and a ratio of the raw materials, 2, composite fed material preparation, and 3, eutectic nanometer composite coating preparation: preparing the [Cr+(Crx, Al1-x)2O3] eutectic nanometer composite coating by an atmospheric plasma spraying method. The eutectic nanometer composite ceramic coating is characterized in that a matrix is a component-controllable ceramic solid solution, and a metal phase in a form of nanometer particles (rods) is dispersively distributed on the ceramic matrix so that the ceramic solid solution-based ceramic-metal eutectic nanometer composite coating is obtained. The prepared [Cr+(Crx, Al1-x)2O3] eutectic nanometer composite coating has high toughness, good wear resistance, high temperature oxidation resistance and corrosion resistance.

Description

technical field [0001] The invention relates to a technique for preparing a ceramic / metal nanocomposite coating with a reactive thermal spraying method, in particular to a method for preparing a ceramic solid solution based ceramic-metal eutectic nanocomposite coating by reactive spraying. Background technique [0002] Nanocomposite ceramic coating preparation technology has attracted much attention in the field of surface engineering. There are three main methods for preparing nano-ceramic coatings. One is to use PVD and CVD to prepare ceramic thin films or multi-layer coatings. Ceramic coating, the third is to use the method of reactive spraying to prepare nano-ceramic coating. The preparation of nanocomposite coating technology by reactive spraying represents the development direction of nanomaterial application today. [0003] There are some reports on the method of preparing composite coatings by means of reactive spraying, such as CN201110229306.0, which adopts a rod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/12C23C4/10C23C4/06C23C4/134
Inventor 阎殿然杨勇陈学广褚振华董艳春张建新
Owner HEBEI UNIV OF TECH
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