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Mechanical performance testing system and method for carbon nanotube fibers in high-temperature state

A carbon nanotube fiber, high temperature technology, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, scientific instruments, etc., to achieve the effect of simple structure and easy construction

Pending Publication Date: 2018-08-10
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of materials in the aerospace field requires that they have good mechanical properties under high temperature conditions. At present, there are few reports on the mechanical properties of carbon nanotube fibers under high temperature conditions.

Method used

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  • Mechanical performance testing system and method for carbon nanotube fibers in high-temperature state
  • Mechanical performance testing system and method for carbon nanotube fibers in high-temperature state
  • Mechanical performance testing system and method for carbon nanotube fibers in high-temperature state

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The carbon nanotube fiber prepared by the floating catalytic method is connected to both ends of the carbon nanotube fiber with a copper wire, and the copper wire is passed through the upper and lower ports of the quartz tube, and the wire is clamped with two clamps of a universal material testing machine, and the carbon nanotube fiber stay vertical;

[0055] Connect the DC power supply to the wire, set the current to 0.3A, and keep it constant, pass the inert gas into the quartz tube in advance, ventilate for one minute to remove the air, and continue to pass the inert gas during the test;

[0056] Aim the eyepiece of the infrared thermometer at the middle of the carbon nanotube fiber, and turn on the infrared test switch in advance to record the temperature change of the carbon nanotube fiber during the electrification process;

[0057] Simultaneously turn on the DC power supply and the start button of the universal material testing machine to test the mechanical prop...

Embodiment 2

[0059]The current of the DC power supply is set to 0.4A, and the temperature of the carbon nanotube fiber is 1340°C. The rest of the steps are the same as in Example 1, and the mechanical properties of the carbon nanotube fiber are tested at a temperature of 1340°C. The test results are as follows Figure 4 shown.

Embodiment 3

[0061] The current of the DC power supply is set to 0.5A, the temperature of the carbon nanotube fiber is 1600°C, and the rest of the steps are the same as in Example 1. The mechanical properties of the carbon nanotube fiber are tested at a temperature of 1600°C. The test results are as follows Figure 4 shown.

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Abstract

The invention discloses a mechanical performance testing system and method for carbon nanotube fibers in a high-temperature state. The mechanical performance testing system for the carbon nanotube fibers in the high-temperature state comprises a mechanical performance testing device, a power supply device, a gas protection device and a temperature testing device. The mechanical performance testingdevice is used for applying force required by testing to to-be-tested carbon nanotube fibers. The power supply device is used for feeding current into the to-be-tested carbon nanotube fibers to realize self heating of the to-be-tested carbon nanotube fibers. The gas protection device is at least used for providing a protective gas environment for the to-be-tested carbon nanotube fibers in testing. The temperature testing device is used for detecting the temperature of the to-be-tested carbon nanotube fibers. By the mechanical performance testing system, mechanical performance testing of the carbon nanotube fibers under high-temperature conditions is realized, the temperature of the to-be-tested carbon nanotube fibers can be increased to 2000 DEG C or above by means of ohmic heating, and accordingly mechanical performance testing data under different temperature conditions can be obtained.

Description

technical field [0001] The invention particularly relates to a system and method for testing the mechanical properties of carbon nanotube fibers in a high temperature state, belonging to the technical field of carbon nanotube performance testing. Background technique [0002] Carbon nanotubes are nanomaterials with one-dimensional structure, which are rolled into a ring structure by similar single-layer graphite, and have excellent mechanical, electrical, thermal and other properties. It has broad application prospects in aerospace, electromagnetic shielding materials, energy storage, lightweight wires, safety protection, biological materials and other fields. The carbon nanotube fibers are more conducive to the conduction of force, electricity and heat due to the approximately parallel arrangement of the tubes. Utilizing the characteristics of light weight and high strength of carbon nanotube fibers, it can be used in aerospace and safety protection and other fields; at th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/18
CPCG01N3/18G01N2203/0226G01N2203/0017
Inventor 邸江涛张超宋彦辉李清文
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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