GB/T 34520.6-2017 in English

VALID

Test methods for continuous silicon carbide fiber-Part 6:Resistivity

Issued on:2017-11-01
Implemented on:2018-02-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $160.00
$156.00

Standard No:	GB/T 34520.6-2017
Document status:	VALID
Title in English:	Test methods for continuous silicon carbide fiber-Part 6:Resistivity
Title in Chinese:	连续碳化硅纤维测试方法第6部分：电阻率
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2017-11-01
Implemented on:	2018-02-01
ICS Classification:	49.025.99-Other materials
Chinese Classification:	V13-Nonmetallic materials used for aviation and aerospace
Professional Classification:	GB-National Standard
Related Keywords:	resistivity test continuous silicon carbide result calculation single fiber resistivity calculation formula bundle resistivity calculation formula test methods
Related Topics:	carbon fiber test Carbon Fiber Test Method Test method for carbon fiber sheets Continuous silicon carbide fiber test method Silicon carbide fiber test high temperature strength retention rate Carbon Fiber Sheet Method Carbon electrode resistivity Carbon resistivity Fiber Test Method Fiber Resistivity Test Continuous SiC Fiber Carbon Fiber Test Method Carbon electrode resistivity Fiber Test Method continuous electrochemistry resistivity carbon Military Continuous Silicon Carbide Fiber GB/T 34520.6 GB/T 34520.6-2017 Apparent resistivity test Latest carbon fiber testing Carbonation test Fiber conductivity test Carbon fiber pole testing Silicon carbide fiber classification Fiber surface resistivity test Continuous silicon carbide Fiber High Temperature Conductivity Test Strength determination of continuous silicon carbide fibers Silicon carbide bulk metal test method Radio and television metering silicon carbide testing Carbon formation rate test Fiber water retention test Liquid phase continuous peak integration method Silicon carbide fiber cloth products Silicon carbide electrical properties test standards Silicon carbide fiber evaluation method Silicon carbide fiber wear resistance standard

《GB/T 34520.6-2017连续碳化硅纤维测试方法第6部分：电阻率》由TC425（全国宇航技术及其应用标准化技术委员会）归口，TC425SC6（全国宇航技术及其应用标准化技术委员会航天材料与工艺分会）执行，主管部门为国家标准化管理委员会。

Introduction

GB/T 34520.6—2017 Standard Overview

This part specifies the test method for the resistivity of continuous silicon carbide (SiC) fibers, which is applicable to the resistivity test of single fibers and bundles.

Test principle and equipment requirements

Item	Description
Test principle	The resistivity is calculated from the resistance, length and cross-sectional area of the sample. The cross-sectional area of a single fiber is calculated by the diameter, and the cross-sectional area of a bundle is calculated by the density and linear density.
High resistance meter	Measurement range: $10\Omega \sim 10^{14}\Omega$, accuracy: $\pm5\%$ rdg, output voltage not less than $500~\mathrm{V}$.
Regulated DC power supply	Accuracy not less than $0.5\%$, maximum output voltage: $500~\mathrm{V}$, current: $5~\mathrm{A}$.

Test environment and sample preparation

Standard test environment: temperature $23~^\circ\mathrm{C} \pm 5~^\circ\mathrm{C}$, relative humidity $50\% \pm 20\%$.

Sample preparation:

Single fiber: Cut $60~\mathrm{mm} \sim 70~\mathrm{mm}$ fiber, bond it to the reinforcement sheet, and extend $10~\mathrm{mm}$ at both ends.
Bundle: Lay it flat on the insulating substrate and fix the electrode with copper bolts.

Test procedure and result calculation

Single fiber resistivity calculation formula:

$$ S_{\iota i} = \frac{\pi D_i^2 R_i}{4L_i} \times 10^{-9} $$

Bundle resistivity calculation formula:

$$ S_{si} = \frac{R_{si} T_s}{L_{si} \rho_s} $$

Implementation recommendations

Prepare specimens strictly in accordance with the standards to ensure that there are no defects.
Test equipment should be calibrated regularly to ensure measurement accuracy.
Record detailed test environmental conditions to facilitate data analysis.
It is recommended to conduct a comprehensive evaluation in combination with other performance indicators (such as tensile strength).

More samples: JGJ 94-2008 DL/T 368-2010 JJG 21-2008

Sample only — not a preview of GB/T 34520.6-2017