Standard substance for calibration of plasma ablation tester and preparation method thereof

An ablation test and reference material technology, applied in the field of metrology, can solve the problem of not being able to meet the calibration needs of a plasma ablation test machine, and achieve the effects of convenient operation, good repeatability, and accurate and reliable setting.

Inactive Publication Date: 2019-11-05
SHANDONG NON METALLIC MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The plasma line ablation rate of the carbon fiber reinforced phenolic resin composite material prepared by this method is about (0.1-0.3) mm / s, which cannot meet the calibration requirements of the plasma ablation testing machine

Method used

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  • Standard substance for calibration of plasma ablation tester and preparation method thereof
  • Standard substance for calibration of plasma ablation tester and preparation method thereof
  • Standard substance for calibration of plasma ablation tester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] According to the uniformity and stability requirements of the standard substance, the present invention selects the commonly used carbon fiber reinforced phenolic resin as the raw material of the plasma line ablation rate standard substance of the thermal protection material.

[0022] (1) Sample preparation

[0023] Preparation of prepreg: Measure the solid content of S157 phenolic resin solution to be 53.0%. According to the ratio of carbon fiber to effective phenolic resin mass ratio of 1:4, weigh 50g of carbon fiber with a length of 8mm and 380g of phenolic resin solution, and mix them evenly , spread out on a polyester film, dry at room temperature for 4 days, and store in the refrigerator for later use.

[0024] Pre-baking pre-treatment: Weigh 5 parts (11±0.5) g of prepreg, place the prepreg in an oven at 100°C to soften for 30 minutes, and take it out when the prepreg becomes soft and slightly sticky.

[0025] Compression molding: Take out the pretreated prepreg ...

Embodiment 2

[0050] (1) Preparation of samples:

[0051] Preparation of prepreg: Measure the solid content of S157 phenolic resin solution to be 53.8%, weigh 50g of carbon fiber with a length of 6mm and 390g of phenolic resin solution according to the mass ratio of carbon fiber and effective phenolic resin of 1:4.2, mix them evenly, and spread them out Place it on a polyester film to dry for 4 days, and place it in the refrigerator for later use.

[0052] Pre-baking pre-treatment: Weigh 5 parts (11±0.5) g of prepreg, soften the prepreg in an oven at 105°C for 28 minutes, and take it out when the prepreg becomes soft and becomes slightly sticky.

[0053] Compression molding: Take out the pretreated prepreg and quickly put it into a mold preheated to 120°C, close the mold, and exhaust the air for 3 times. Start timing at ℃, and take out the sample after constant temperature for 14 minutes.

[0054] (2) Uniformity test

[0055] The uniformity test was carried out according to the method of...

Embodiment 3

[0065] (1) Preparation of samples:

[0066] Preparation of prepreg: Measure the solid content of S157 phenolic resin solution to be 54.2%, weigh 50g of carbon fiber with a length of 4mm and 352g of phenolic resin solution according to the mass ratio of carbon fiber and effective phenolic resin of 1:3.8, mix them evenly, and spread them out Place it on a polyester film to dry for 4 days, and place it in the refrigerator for later use.

[0067] Pre-baking pre-treatment: Weigh 5 parts (11±0.5) g of prepreg, soften the prepreg in an oven at 95°C for 32 minutes, and take it out when the prepreg becomes soft and becomes slightly sticky.

[0068] Compression molding: take out the pretreated prepreg and quickly put it into a mold preheated to 120°C, close the mold, and exhaust the air for 3 times. Start timing at ℃, and take out the sample after constant temperature for 16 minutes.

[0069] (2) Uniformity test

[0070] The uniformity test was carried out according to the method of ...

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Abstract

The invention discloses a standard substance for calibration of a plasma ablation tester and a preparation method thereof, and belongs to the technical field of measurement. The standard substance forcalibration of the plasma ablation tester is prepared from a composite material prepared from carbon fiber with the length being (6+ / -2) mm and S157 effective phenolic resin at the mass ratio being 1:(3.8-4.2), the standard substance is shaped like a circular block, the linear ablation rate is 0.484+ / -0.030 mm / s. The standard substance has the advantages of being uniform in stability, accurate and reliable in setting and the like, and is suitable for verification and calibration of the plasma ablation tester, and the preparation method is good in repeatability and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of measurement, and in particular relates to a standard substance used for calibrating a plasma ablation testing machine and a preparation method thereof. [0002] technical background [0003] The linear ablation rate of thermal protection materials indicates the variation of thermal protection material thickness per unit time under ablation conditions, which is a direct reflection of the ablation resistance of thermal protection materials and an important technical index of thermal protection materials. The plasma line ablation rate is completed on the plasma ablation testing machine according to GJB 323A-96 "Ablation Test Method for Ablation Materials". The plasma ablation testing machine uses the plasma jet as the heat source, the test temperature is high, and the heat flux density is as high as 25000kw / m 2 , to meet the needs of high-strength ablation tests, and is widely used in the evaluation of ablat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/12G01N1/28
CPCG01N1/28G01N31/12
Inventor 孟祥艳王康刘运传王雪蓉王倩倩郑会保周燕萍姚凯陈海玲
Owner SHANDONG NON METALLIC MATERIAL RES INST
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