Non-Destructive Mechanical Characterization of Sic Fibers by Raman Spectroscopy

TL;DR

This study demonstrates that Raman spectroscopy can be used as a rapid, non-destructive method to predict the mechanical properties of SiC fibers, including in situ analysis within composite materials.

Contribution

It introduces a simple spectral fitting approach that correlates Raman spectra with mechanical properties of SiC fibers, expanding the application of Raman spectroscopy in materials characterization.

Findings

Raman spectra correlate with Young's modulus, tensile strength, and micro-hardness.

The spectral analysis provides a non-destructive prediction method.

The correlation is based on the micro/nanostructure dependence of Raman signals.

Abstract

The paper provides a comprehensive study on Raman spectroscopy versatility as a fast and non destructive tool for the prediction of the mechanical properties of SiC fibers derived from a polymeric precursor (NLM, Hi, Hi-S, SA and Sylramic grades) or produced by CVD (SCS-6 fiber), including in situ analysis in CMCs or MMCs. We show how the results of very simple spectra fitting are correlated with Young's modulus, tensile strength and micro-hardness. The reason why such a correlation exists, the common dependency of Raman signal and mechanical behavior to the micro/nanostructure of ceramics, is discussed.