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Ni coated SiC compound powder enhanced iron-based composite material, and preparation method thereof

A technology of iron-based composite materials and composite powders, applied in transportation and packaging, metal processing equipment, coatings, etc., can solve the problems of unsatisfactory mechanical properties, poor compatibility between SiC and iron matrix, etc., and achieve improvement Interfacial bonding and dispersion uniformity, improving interfacial bonding, and improving mechanical properties

Active Publication Date: 2015-01-28
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a Ni-wrapped SiC composite powder reinforced iron-based composite material to solve the problem that the mechanical properties of existing SiC-reinforced iron-based composite materials cannot meet the requirements of use due to poor compatibility between SiC and iron matrix question

Method used

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  • Ni coated SiC compound powder enhanced iron-based composite material, and preparation method thereof
  • Ni coated SiC compound powder enhanced iron-based composite material, and preparation method thereof
  • Ni coated SiC compound powder enhanced iron-based composite material, and preparation method thereof

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Experimental program
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Embodiment 1

[0034] The Ni-wrapped SiC composite powder reinforced iron-based composite material in this embodiment contains the following components in weight percentage: 10% Ni-wrapped SiC composite powder and 90% iron. In the Ni-wrapped SiC composite powder, the mass ratio of Ni to SiC is 1:1.

[0035] The Ni-wrapped SiC composite powder is prepared by the following method:

[0036] 1) Add 7.5ml of N 2 h 4 ·H 2 O was added dropwise to NiCl 2 In the dehydrated ethanol solution, keep stirring for 1h to make it mix uniformly, and obtain the nickel-hydrazine complex precursor; in the nickel-hydrazine complex precursor, Ni 2+ The concentration is 0.3mol / L; N 2 h 4 ·H 2 The amount of O added is such that N 2 h 4 with you 2+ The molar ratio is 4:1;

[0037] 2) Add 1.76g of SiC powder into the NaOH solution, stir to mix evenly, and obtain a mixed slurry;

[0038] 3) Mix the nickel-hydrazine complex precursor obtained in step 1) with the mixed slurry obtained in step 2) according to ...

Embodiment 2

[0046] The Ni-wrapped SiC composite powder reinforced iron-based composite material in this embodiment contains the following components in weight percentage: 18% Ni-wrapped SiC composite powder and 82% iron. In the Ni-wrapped SiC composite powder, the mass ratio of Ni to SiC is 1:1.

[0047] The Ni-wrapped SiC composite powder is prepared by the following method:

[0048] 1) Set N 2 h 4 ·H 2 O was added dropwise to NiCl 2 In the dehydrated ethanol solution, keep stirring for 1h to make it mix uniformly, and obtain the nickel-hydrazine complex precursor; in the nickel-hydrazine complex precursor, Ni 2+ The concentration is 0.2mol / L; N 2 h 4 ·H 2 The amount of O added is such that N 2 h 4 with you 2+ The molar ratio is 8:1;

[0049] 2) Add SiC powder into NaOH solution, stir to make it evenly mixed, and get mixed slurry;

[0050] 3) Mix the nickel-hydrazine complex precursor obtained in step 1) with the mixed slurry obtained in step 2) according to Ni 2+ After mixi...

Embodiment 3

[0057] The Ni-wrapped SiC composite powder reinforced iron-based composite material in this embodiment contains the following components in weight percentage: 4% Ni-wrapped SiC composite powder, 96% iron. In the Ni-wrapped SiC composite powder, the mass ratio of Ni to SiC is 1:1.

[0058] The Ni-wrapped SiC composite powder is prepared by the following method:

[0059] 1) Set N 2 h 4 ·H 2 O was added dropwise to NiCl 2 In the dehydrated ethanol solution, keep stirring for 1h to make it mix uniformly, and obtain the nickel-hydrazine complex precursor; in the nickel-hydrazine complex precursor, Ni 2+ The concentration is 0.5mol / L; N 2 h 4 ·H 2 The amount of O added is such that N 2 h 4 with you 2+ The molar ratio is 6:1;

[0060] 2) Add SiC powder into NaOH solution, stir to make it evenly mixed, and get mixed slurry;

[0061] 3) Mix the nickel-hydrazine complex precursor obtained in step 1) with the mixed slurry obtained in step 2) according to Ni 2+ After mixing w...

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Abstract

The invention discloses a Ni coated SiC compound powder enhanced iron-based composite material, and a preparation method thereof. The composite material comprises, by weight, 2%-18% of Ni coated SiC compound powder and 82-98% of iron. According to the Ni coated SiC compound powder enhanced iron-based composite material, Ni coats silicon carbide particle surfaces to be used as a transition layer; the Ni transition layer has relatively good interface affinity with the SiC particles, and improves interface adhesion between a silicon carbide particle reinforced phase and an iron substrate and dispersion uniformity; the Ni transition layer can prevent direct surface contact when a plurality of SiC particles aggregate; and a Ni-Fe alloy phase formed by the Ni transition layer and the substrate Fe can prevent or delay mutual diffusion of reactant atoms in a SiC / Fe interface solid phase reaction, thereby effectively inhibiting formation of hard and crisp ferrosilicon compounds, so that the composite material gains good comprehensive mechanical properties, use performances and performance stability.

Description

technical field [0001] The invention belongs to the technical field of metal-based composite materials, and in particular relates to a Ni-wrapped SiC composite powder-reinforced iron-based composite material, and also relates to a preparation method of a Ni-wrapped SiC composite powder-reinforced iron-based composite material. Background technique [0002] Particle-reinforced metal matrix composites have the advantages of excellent high-temperature mechanical properties and wear resistance, simple preparation process, and low cost of reinforcement, and have attracted the attention of modern materials research. Fe-based composite materials reinforced with SiC particles are a typical representative, because they give full play to the advantages of high hardness, high wear resistance of SiC particles and good toughness and ductility of Fe. Therefore, SiC-reinforced Fe-based composites have broad application prospects in the fields of high-temperature materials for aerospace and...

Claims

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Application Information

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IPC IPC(8): C22C38/00C22C33/02B22F1/02
CPCC22C33/02C22C33/0292C22C38/08B22F3/14B22F2999/00B22F1/17B22F2201/20
Inventor 张锐范冰冰邵刚王彬彬王海龙陈德良卢红霞许红亮王晨阳李稳李新芳
Owner ZHENGZHOU UNIV
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