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GB/T 40535.1-2021 English PDF

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GB/T 40535.1-2021: Test methods of continuous nitride ceramic fibers - Part 1: Nitrogen content
Status: Valid

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 40535.1-2021	English	199	Add to Cart	3 days [Need to translate]	Test methods of continuous nitride ceramic fibers - Part 1: Nitrogen content	Valid	GB/T 40535.1-2021

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Standard similar to GB/T 40535.1-2021

GB/T 34520.8 GB/T 44925 GB/T 40540

Basic data

Standard ID	GB/T 40535.1-2021 (GB/T40535.1-2021)
Description (Translated English)	Test methods of continuous nitride ceramic fibers - Part 1: Nitrogen content
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	V13
Word Count Estimation	10,164
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration

GB/T 40535.1-2021: Test methods of continuous nitride ceramic fibers - Part 1: Nitrogen content

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Test methods of continuous nitride ceramic fibers - Part 1.Nitrogen content ICS 49.020 CCSV13 National Standards of People's Republic of China Continuous nitride ceramic fiber test method Part 1.Nitrogen content Released on 2021-08-20 2022-03-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. This document is the first part of GB/T 40535 "Test Method for Continuous Nitride Ceramic Fiber". GB/T 40535 has been released Lower part. ---Part 1.Nitrogen content. Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents. This document was proposed and managed by the National Aerospace Technology and Application Standardization Technical Committee (SAC/TC425). Drafting organizations of this document. National University of Defense Technology, Fujian Asia New Materials Co., Ltd., China Aerospace Standardization Institute. The main drafters of this document. Wang Bing, Wang Yingde, Shao Changwei, Wang Xiaozhou, Gou Yanzi, Han Cheng, Tang Zuojiao, Xing Xin, Tang Yajuan, Huang Xiangxian, Yang Xiaofeng, Lian Shujuan, Zhang Andong, Zhang Xingchao, Zheng Wei.

Introduction

Continuous nitride ceramic fiber is one of the ideal reinforcement fibers for high-temperature wave-transmitting ceramic materials. Arrows, spaceships, missiles, hypersonic strike weapons in nearby space, etc. With the rapid development of the domestic continuous nitride ceramic fiber industry, fiber research System units, production units, and application units all need unified test standards for assessment and evaluation, but there are currently no continuous nitride ceramics at home and abroad Fiber testing standards. Continuous nitride ceramic fiber test items mainly include tensile mechanical properties, oxygen, carbon, nitrogen, boron, sodium, iron and dielectric constant And dielectric loss test. The testing of mechanical properties, oxygen and carbon can refer to the relevant standards of continuous silicon carbide fiber testing methods. This standard system is proposed to It consists of 5 parts. ---Part 1.Nitrogen content. Specifies the test method for nitrogen in continuous nitride ceramic fibers. ---Part 2.Boron content. Specifies the test method for boron in continuous nitride ceramic fibers. ---Part 3.Impurity sodium and iron content. It specifies the test method of impurity sodium and iron in continuous nitride ceramic fiber. ---Part 4.Determination of specific surface and pore size distribution. Specified the test of specific surface and pore size distribution in continuous nitride ceramic fiber method. ---Part 5.Dielectric constant and dielectric loss. Specified the test of dielectric constant and dielectric loss in continuous nitride ceramic fiber method. This document is the first part of the standard system, which can provide a general test method for the nitrogen content test of continuous nitride ceramic fiber Enter into technical exchanges and cooperation among various units. Continuous nitride ceramic fiber test method Part 1.Nitrogen content

1 Scope

This document specifies the sample preparation and sample preparation for the determination of nitrogen content in continuous nitride ceramic fibers by the inert gas fusion-thermal conductivity detection method. Test, test result calculation, etc. This document is applicable to the determination of continuous silicon nitride ceramic fiber, continuous boron nitride ceramic fiber, continuous silicon nitride ceramic fiber, continuous silicon nitride ceramic fiber, continuous silicon nitride ceramic fiber, continuous silicon nitride ceramic fiber, continuous silicon nitride ceramic fiber, continuous silicon nitride ceramic fiber The total nitrogen content of continuous silicon-boron-nitrogen ceramic fiber and continuous silicon-boron-carbon-nitrogen ceramic fiber. Nitrogen content test of discontinuous nitride ceramic fiber and matrix Refer to this document. Refer to this document for the nitrogen content test of other ceramic fibers.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to This document. GB/T 674 Chemical reagent powdered copper oxide GB/T 1446 General Principles of Test Methods for Performance of Fiber Reinforced Plastics GB/T 4844 pure helium, high-purity helium and ultra-pure helium GB/T 6003.1 Technical requirements and inspection of test sieves Part 1.Metal wire woven mesh test sieves GB/T 8170 Numerical rounding rules and the expression and determination of limit values GB/T 26016 high purity nickel GB/T 26017 high purity copper GB/T 34520.1 Continuous silicon carbide fiber test method Part 1.Bundle wire sizing rate

3 Terms and definitions

There are no terms and definitions that need to be defined in this document.

4 Test principle

The continuous nitride ceramic fiber sample (hereinafter referred to as the sample) is put into a graphite crucible, and the sample is melted under the protection of an inert carrier gas (helium) Decomposition, the nitrogen element is released in the form of nitrogen molecules, and then carried by the carrier gas into the thermal conductivity detection cell, the thermal conductivity detection cell is based on the nitrogen and the carrier The difference in the thermal conductivity of the gas tests the nitrogen concentration and outputs the voltage signal value, and the data receiving and processing system is based on the output voltage signal value and the sample The mass calculation results in the nitrogen content of the sample, which is displayed in mass fraction.

5 Test environment

The standard test environmental conditions are implemented in accordance with the standard environmental requirements specified in GB/T 1446, temperature (23±2) ℃, relative humidity (50± 10)%.

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