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Low-melting point metal-matrix aramid fiber composite material and preparation method thereof

A low-melting-point metal and aramid fiber technology is applied in the field of low-melting-point metal-based aramid fiber composite materials and their preparation, and can solve the problems of insufficient fatigue resistance and poor plasticity of tin alloys.

Inactive Publication Date: 2013-08-21
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the existence of more hard and brittle phases in the structure of tin-based alloys, the plasticity of tin-based alloys is poor, and the fatigue strength is not high enough.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0021] Embodiment 1: The metal lead-based aramid fiber composite material prepared in this example has a structure in which aramid fiber is embedded in a metal lead matrix, and the volume ratio of metal lead to aramid fiber is 95:5. The aramid fiber is Kevlar-49, is linear, and has a single filament diameter of 12 μm. Concrete preparation steps include as follows:

[0022] (1) The aramid fiber is subjected to surface metallization treatment, and a layer of pure metal nickel with a thickness of 1.0 μm is plated on the surface;

[0023] (2) The aramid fibers treated with surface metallization in step (1) are made into a die-casting prefabricated body. On the wire frame, the volume of aramid fiber is 8% of the volume of the whole prefabricated body;

[0024] (3) Put the aramid fiber preform in step (2) into the die-casting mold, and then infiltrate the molten metal lead into the die-casting mold by infiltration method so that the aramid fiber and the metal lead are closely comb...

Embodiment approach 2

[0026] Embodiment 2: The lead alloy-based aramid fiber composite material prepared in this example has a structure in which aramid fiber is embedded in a metal lead alloy matrix, and the volume ratio of lead alloy to aramid fiber is 96:4. The lead alloy refers to pure metallic lead or a lead alloy with a lead content of 50wt%, and the aramid fiber is Kevlar-49, which is linear and has a single filament diameter of 12 μm. Concrete preparation steps include as follows:

[0027] (1) The aramid fiber is subjected to surface metallization treatment, and a layer of pure metal nickel with a thickness of 2.0 μm is plated on the surface;

[0028] (2) The aramid fibers treated with surface metallization in step (1) are made into a die-casting prefabricated body. On the wire frame, the volume of aramid fiber is 10% of the volume of the entire prefabricated body;

[0029] (3) Put the aramid fiber prefabricated body in step (2) into the die-casting mold, and then infiltrate and press the...

Embodiment approach 3

[0031] Embodiment 3: The structure of the lead-alloy metal-based aramid fiber composite material prepared in this example is that aramid fiber is embedded in the lead alloy matrix, and the volume ratio of lead alloy and aramid fiber is 97:3. Lead alloys refer to pure metallic lead or lead alloys containing 60wt% lead. The aramid fiber is Kevlar-49, is linear, and has a single filament diameter of 12 μm. Concrete preparation steps include as follows:

[0032](1) The aramid fiber is subjected to surface metallization treatment, and a pure metal nickel layer with a thickness of 1.8 μm is plated on the surface;

[0033] (2) The aramid fibers treated with surface metallization in step (1) are made into a die-casting prefabricated body. On the wire frame, the volume of aramid fiber is 2% of the volume of the whole prefabricated body;

[0034] (3) Put the aramid fiber prefabricated body in step (2) into the die-casting mold, and then use the infiltration method to infiltrate the m...

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Abstract

The invention relates to a low-melting point metal-matrix aramid fiber composite material and a preparation method thereof, belonging to the field of low-melting point soft metal-matrix fiber reinforced composite materials. The structure of the composite material is as follows: aramid fiber is embedded into a low-melting point metal matrix, and the volume ratio of the low-melting point metal to the aramid fiber is (95-97):(5-3). High-strength aramid fiber is used as a reinforcement of lead and lead alloy, and the molten lead and lead alloy permeate into the aramid fiber after surface metallization to prepare a lead and lead alloy-matrix aramid fiber composite material. A composite material taking a low-melting point soft metal as a matrix is reinforced by fiber in great difference from the strength of the matrix metal material; by adopting a liquid permeation method, a composite material with an obvious reinforcement effect can be effectively prepared only by use of low fiber volume percent; and the tensile strength of the low-melting point metal-matrix composite material provided by the invention can reach 150MPa, and the elongation can reach 20%.

Description

technical field [0001] The invention relates to a low-melting-point metal-based aramid fiber composite material and a preparation method thereof, belonging to the field of low-melting-point soft metal-based fiber-reinforced composite materials. Background technique [0002] The density of lead is 11.35g / cm 3 , with strong ductility and good corrosion resistance, excellent oxidation resistance and acid corrosion resistance. As a typical low melting point (327.4°C) soft metal, the tensile strength of lead is only 18MPa. Since the theoretical recrystallization temperature of lead is lower than normal temperature, recovery and recrystallization also occur while deformation occurs at normal temperature. Traditional strengthening techniques such as solid solution strengthening and processing strain strengthening cannot greatly improve the strength of lead and its alloys, so its application is greatly limited. Most of the existing lead alloys are solid solution-based second-phas...

Claims

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Application Information

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IPC IPC(8): C22C49/02C22C49/14C22C47/04
Inventor 孙勇段永华白苗方东升
Owner KUNMING UNIV OF SCI & TECH
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