Sample preparation method for testing mechanical properties of high-thermal-conductivity mesophase pitch-based carbon fiber composite materials

A technology of mesophase pitch and composite materials, which is used in the preparation of test samples, analysis of materials, and the use of stable tension/pressure to test the strength of materials. Slip and other problems to achieve the effect of increasing the contact area and friction, improving accuracy and ensuring full play

Inactive Publication Date: 2020-01-03
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the extremely high modulus of the high thermal conductivity carbon fiber composite material and the weak interlayer interface, debonding and slippage of the reinforcement sheet and abnormal failure modes often occur during the tensile and compression mechanical performance tests of the composite material, resulting in distortion of the test results

Method used

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  • Sample preparation method for testing mechanical properties of high-thermal-conductivity mesophase pitch-based carbon fiber composite materials
  • Sample preparation method for testing mechanical properties of high-thermal-conductivity mesophase pitch-based carbon fiber composite materials
  • Sample preparation method for testing mechanical properties of high-thermal-conductivity mesophase pitch-based carbon fiber composite materials

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Experimental program
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Embodiment 1

[0036] A sample preparation method for testing the mechanical properties of a high thermal conductivity mesophase pitch-based carbon fiber composite material, the method is used to test the mechanical properties of a high thermal conductivity mesophase pitch based carbon fiber composite flat plate sample;

[0037] Include the following steps:

[0038] (1) According to GB / T1447-2005, a high thermal conductivity mesophase pitch-based carbon fiber reinforced resin-based composite flat sample is prepared, and the size of the sample is 230mm×12.5mm×2mm.

[0039] (2) Prepare tooling and prepare J22 resin glue;

[0040] The tooling includes a bottom plate and a cover plate. The bottom plate is a steel plate with six groups of curing grooves, each group of curing grooves includes two grooves and a limiting groove, the limiting groove is located between the two grooves, The limit groove and the two grooves are coaxial, and the limit groove is used to hold the flat sample; the size of ...

Embodiment 2

[0047] (1) According to GB / T3856-2005, a high thermal conductivity mesophase pitch-based carbon fiber-reinforced resin-based composite flat sample was prepared, and the size of the sample was 140mm×6mm×2mm.

[0048] (2) Prepare tooling and prepare 618 resin glue;

[0049] The tooling includes a bottom plate and a cover plate. The bottom plate is a steel plate with six groups of curing grooves, each group of curing grooves includes two grooves and a limiting groove, the limiting groove is located between the two grooves, The limit groove and the two grooves are coaxial, and the limit groove is used to hold the flat sample; the size of the limit groove matches the size of the flat sample;

[0050] The cover plate is a steel plate with twelve injection holes;

[0051] The grooves on the base plate correspond to the glue injection holes on the cover plate;

[0052] (3) The middle part of the flat sample sample prepared in step (1) is installed in the limiting groove of the base ...

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Abstract

The invention relates to a sample preparation method for testing mechanical properties of high-thermal-conductivity mesophase pitch-based carbon fiber composite materials, and belongs to the technicalfield of material property testing. The method comprises the following steps of cutting and processing mechanical samples of the high-thermal-conductivity mesophase pitch-based carbon fiber compositematerials according to the corresponding test standards, and installing the samples in a reinforced sheet preparation device; preparing a resin reinforced sheet glue, and injecting the glue from theinjection port of the reinforced sheet preparation device until being completely filled; and solidifying cooling, demoulding and trimming the glue injected reinforced sheet preparation device to obtain a composite material mechanical sample. The resin reinforced sheet prepared by the invention covers and fixes a clamping section of the composite material mechanical sample, which effectively increases the contact area and friction between the reinforced sheet and the sample, makes the sample more uniformly dispersed during the test, and avoids abnormal failure due to de-bonding and slippage ofthe reinforced sheet.

Description

technical field [0001] The invention relates to a sample preparation method for testing the mechanical properties of a high thermal conductivity mesophase pitch-based carbon fiber composite material, which belongs to the technical field of material preparation and performance testing. The high thermal conductivity refers to that the thermal conductivity of carbon fibers is not less than 500W / (m · K). Background technique [0002] High thermal conductivity mesophase pitch-based carbon fiber has high thermal conductivity, tensile modulus and near-zero thermal expansion coefficient, and its reinforced composite materials are used in high thermal conductivity structural panels, high rigidity structural parts, and zero expansion coefficient parts in temperature alternating environments It plays an irreplaceable role in aspects such as high thermal conductivity and heat-proof structural parts, and is an irreplaceable key core material in the main structure, functional structure, p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/36G01N3/02G01N3/04G01N3/08
CPCG01N1/28G01N1/36G01N3/02G01N3/04G01N3/08G01N2001/366G01N2203/0016G01N2203/0085G01N2203/0298
Inventor 朱世鹏杨云华冯志海
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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