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Method of preparing zirconium diboride/aluminum-ferric trioxide composite powder

A technology of aluminum oxide and zirconium diboride, applied in the field of ceramic matrix composite material preparation, can solve problems such as unreported, and achieve the effects of low price, simple preparation process and low manufacturing cost

Inactive Publication Date: 2007-09-12
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in ZrB 2 There are few reports on the addition of elemental Fe powder to composite ceramic powders, especially the use of self-propagating high-temperature reduction and ball milling techniques in ZrB 2 -Al 2 o 3 Preparation of ZrB by adding elemental Fe powder to multiphase ceramic powder 2 / Al 2 o 3 -Fe composite powder research has not been reported so far

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take ZrO with a particle size of 65-70 μm 2 20g, 140~150μm B 2 o 3 20g and 100g of 100-150μm Al powder were placed in a ball mill for mechanical dry mixing for 8 hours, and the ball-to-material ratio was 2:1. The mixture was pressed under a pressure of 5 MPa to form a green body with a density equivalent to 40% of the theoretical density. Then the green body is placed in a self-propagating high-temperature reduction synthesis device protected by an argon atmosphere for combustion synthesis. After the synthesis reaction, the product is ground and sieved to obtain ZrB with a particle size of 6-10 μm 2 -Al 2 o 3 Ceramic composite powder. Take ZrB 2 -Al2 o 3 50g, 1g of elemental Fe powder with a particle size of 90-100 μm, placed in a ball mill for ethanol ball milling and wet mixing for 8 hours, with a ball-to-material ratio of 3:1, to obtain a purity of 97-99%, a particle size of 6-8 μm, and its thermal High-performance ZrB with a pressing and sintering temperatu...

Embodiment 2

[0021] Take ZrO with a particle size of 60-65 μm, 100-120 μm, and 100-150 μm 2 , B 2 o 3 30g, 30g and 150g of Al powder were placed in a ball mill for ball milling and dry mixing for 9 hours, and the ball-to-material ratio was 2:1. The mixed material is pressed under a pressure of 10 MPa to form a green body with a density equivalent to 50% of the theoretical density. Then the green body is placed in a self-propagating high-temperature reduction synthesis device protected by an argon atmosphere for combustion synthesis. After the synthesis reaction, the product is ground and sieved to obtain ZrB with a particle size of 6-8 μm 2 -Al 2 o 3 Ceramic composite powder. Take ZrB 2 -Al 2 o 3 60g, 1.2g of elemental Fe powder with a particle size of 80-90 μm, placed in a ball mill for wet mixing by ethanol ball milling for 9 hours, with a ball-to-material ratio of 3:1, to obtain a purity of 97-99%, and a particle size of 5-8 μm, which High-performance ZrB with hot pressing sin...

Embodiment 3

[0023] Take ZrO with a particle size of 55-60 μm 2 40g, 85~100μm B 2 o 3 40g and 200g of Al powder of 120-150μm were placed in a ball mill for mechanical dry mixing for 11 hours, and the ball-to-material ratio was 3:2. The mixture was pressed under 15MPa pressure to form a green body with a density equivalent to 55% of the theoretical density. Then the green body is placed in a self-propagating high-temperature reduction synthesis device protected by an argon atmosphere for combustion synthesis. After the synthesis reaction, the product is ground and sieved to obtain ZrB with a particle size of 5-9 μm 2 -Al 2 o 3 Ceramic composite powder. Take ZrB 2 -Al 2 o 3 70g, 1.4g of elemental Fe powder with a particle size of 70-80 μm, placed in a ball mill for wet mixing by ethanol ball milling for 11 hours, with a ball-to-material ratio of 2:1, to obtain a purity of 97-99%, and a particle size of 5-7 μm, which High-performance ZrB with hot pressing sintering temperature of 14...

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Abstract

This invention relates to a method for composing high performance and easy sintered ZrB2 / Al2O3-Fe compound powder by self-spread high temperature recovery and ball-mill technology including: mixing ZrO2, B2O3 and Al powder uniformly and pressing to molding, then putting it in a self-spread high temperature composition device protected by Ar to ignite and fire it, which is crushed to get pure ZrB2-Al2O3 ceramic complex phase powder to be ball-milled with simple substance Fe powder to get a ZrB2 / Al2O3-Fe compound powder.

Description

technical field [0001] The invention belongs to the technical field of preparation of ceramic-based composite materials, and in particular relates to a method for synthesizing high-performance and easy-to-sinter zirconium diboride / alumina-iron (ceramic / ceramic-metal) composite powder by adopting self-propagating high-temperature reduction and ball milling technology. Background technique [0002] ZrB 2 Because of its high melting point, high strength, high hardness, high chemical stability, excellent corrosion resistance, wear resistance and other excellent properties, it is widely used in hard tool materials, abrasives, alloy additives And wear-resistant parts and other engineering structural parts. Especially in pipeline products under complex working conditions such as corrosion wear, erosion wear, composite corrosion, wear and scaling, etc., the application prospect is broad. At the same time, as a high-temperature structural ceramic, it has great application potential...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/65C04B35/626C04B35/622C04B35/10C04B35/58
Inventor 杨振国于志强
Owner FUDAN UNIV
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