GB/T 34520.1-2017Test methods for continuous silicon carbide fiber - Part 1: Size content of filament yarn (English PDF)

1 Scope

This section GB/T 34520 specifies the use of hot air degradation (Method A), thermal degradation (Method B) and solvent removal (method

C) Test environment for testing the rate of sizing of silicon carbide (SiC) fiber strand, test equipment, test procedure, test result meter

Count and test report.

This section applies to the determination of continuous SiC fiber bundle sizing rate, the determination of other forms of SiC fiber sizing can refer to the use.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article

Pieces. For undated references, the latest edition (including all amendments) applies to this document.

Textile and textile materials - Performance and test terms - Part 3. General

GB/T 4146.3 Textiles chemical fibers Part 3. Inspection terms

GB/T 8170 rounded repair rules and limit values of the representation and judgment

GB/T 15723 laboratory glassware dryer

GB/T 18374 Reinforcement terms and definitions

3 Terms and definitions

GB/T 3291.3, GB/T 4146.3 and GB/T 18374 as defined by the following terms and definitions apply to this document.

4 test principle

The rate of sizing on the surface of the strand is obtained by subtracting the mass difference before and after the sizing agent from the mass after the sizing agent is removed. continuous

Methods for removing the sizing agent on the surface of the SiC fiber bundle include hot air degradation (Method A), thermal degradation (Method B), and solvent removal (Method C). The hot air degradation method (Method A) is to remove the fiber strand surface slurry under air atmosphere. The thermal degradation method (Method B) is at rest

Remove the fiber strand surface slurry in a mild atmosphere. The solvent removal method (Method C) is based on the principle of compatibility of similar, using a suitable solvent

The sizing agent on the surface of continuous SiC fiber bundle dissolves.

5 test environment

Standard test environment conditions. temperature is 23 °C ± 5 °C, relative humidity is 50% ± 20%.