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A method for preparing high-strength metal foam with calcium silicate fiber precursor

A technology of metal foam and calcium silicate, which is applied in the field of foam materials, can solve the problems of low tensile strength and low structural strength, and achieve the effect of low production cost and excellent mechanical properties

Active Publication Date: 2019-10-29
河北翔金超环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of the above-mentioned technical problems, the present invention provides a method for preparing high-strength metal foams with calcium silicate fiber precursors, which solves the technical problems in the prior art that the structural strength of foam metal molding is not high and the tensile strength is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for preparing high-strength metal foam with calcium silicate fiber precursor, the operation steps are as follows:

[0030] 1) Mix calcium hydroxide powder and silicic acid solution at a weight ratio of 1:6, stir for 1 hour, and prepare calcium acid precursor solution;

[0031] 2) Mix the calcium acid precursor solution prepared in step 1) with metal powder, stir it into a paste, and extrude the paste; the amount of metal powder added is 20% of the mass of the calcium acid precursor solution; The metal powder is a mixture of iron powder, aluminum powder, copper powder, silver powder and zinc powder;

[0032] 3) In the state of vacuuming, the vacuum degree is 0.01MPa, and the molding paste in step 2) is fired at 560°C to sinter, and the edges are trimmed.

[0033] The metal foam prepared by the above method has a tensile strength of 1365N / mm 2 , Vickers hardness is 360.

Embodiment 2

[0035] A method for preparing high-strength metal foam with calcium silicate fiber precursor, the operation steps are as follows:

[0036] 1) Mix calcium hydroxide powder and silicic acid solution at a weight ratio of 1:6, stir for 1 hour, and prepare calcium acid precursor solution;

[0037] 2) Mix the calcium acid precursor solution prepared in step 1) with metal powder, stir it into a paste, and extrude the paste; the amount of metal powder added is 20% of the mass of the calcium acid precursor solution; The metal powder is a mixture of iron powder, aluminum powder, copper powder and silver powder;

[0038] 3) In the state of vacuuming, the vacuum degree is 0.01MPa, and the molding paste in step 2) is fired at 500°C to sinter, and the edges are trimmed.

[0039] The metal foam prepared by the above method has a tensile strength of 1305N / mm 2 , Vickers hardness is 340.

Embodiment 3

[0041] A method for preparing high-strength metal foam with calcium silicate fiber precursor, the operation steps are as follows:

[0042] 1) Mix calcium hydroxide powder and silicic acid solution at a weight ratio of 1:6, stir for 1 hour, and prepare calcium acid precursor solution;

[0043] 2) Mix the calcium acid precursor solution prepared in step 1) with metal powder, stir it into a paste, and extrude the paste; the amount of metal powder added is 20% of the mass of the calcium acid precursor solution; The metal powder is a mixture of iron powder, silver powder and zinc powder;

[0044] 3) In the state of vacuuming, the vacuum degree is 0.01MPa, and the molding paste in step 2) is fired at 560°C to sinter, and the edges are trimmed.

[0045]The metal foam prepared by the above method has a tensile strength of 1255N / mm 2 , Vickers hardness is 320.

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Abstract

The invention provides a method for preparing high-strength foamed metal with a calcium silicate fiber precursor. The method comprises operation steps: 1) mixing and stirring calcium hydroxide powderand a silicic acid solution to prepare a calcium hydroxide precursor solution; 2) mixing calcium acid precursor solution obtained in step 1) with metal powder, and stirring to form paste; and 3) in avacuum state, firing and sintering the paste obtained in the step 2) to obtain the product. The calcium hydroxide powder and the silicic acid solution are firstly mixed and stirred to prepare the calcium carbonate precursor solution, a calcium silicate fiber precursor is selected for blending, and the purpose is that the dispersibility of calcium hydroxide and silicic acid in the mixed solution isbetter than that of the single calcium silicate fiber in the mixed solution; and in addition, the production cost is relatively low. 2, the calcium acid precursor solution can be formed in the metalpowder at a vacuum state, and existing metal powder can be mixed uniformly in the calcium acid precursor solution.

Description

technical field [0001] The invention relates to the technical field of foam materials, in particular to a method for preparing high-strength metal foam by using a calcium silicate fiber precursor. Background technique [0002] Porous metal foam material is actually a composite material of metal and gas. It is because of this special structure that it has both the characteristics of metal and the characteristics of bubbles, such as small specific gravity, large specific surface, good energy absorption, and thermal conductivity. Low (closed-cell body), high heat transfer and heat dissipation capacity (through-hole body), good sound absorption (through-hole body), excellent permeability (through-hole body), good electromagnetic wave absorption (through-hole body), flame resistance, Heat and fire resistance, thermal shock resistance, gas sensitivity (some porous metals are very sensitive to certain gases), regeneration, good processability, etc. Therefore, as a new type of func...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08
Inventor 陈庆昝航
Owner 河北翔金超环保科技有限公司