|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals and Materials
||In-situ Raman Microprobing and Ex-situ Raman Mapping of Indented Glasses
||Yvonne B. Gerbig, Chris Michaels
|On-Site Speaker (Planned)
||Yvonne B. Gerbig
This talk will address two challenges in the spectroscopic characterization of indented glasses:
(1) in-situ observations of local structural changes during indentation: The integration of in-situ Raman microscopy with instrumented indentation has the potential to provide descriptive insights into the relationship between structure and densification of glasses.
(2) ex-situ mapping of the densified region: Raman spectroscopic measurements in the past suffered from low spatial resolution, hence, requiring impressions created by Newton-range forces to map densification variations with reasonable resolution but potentially affecting the densified area due to crack initiation.
This talk will describe a custom-built optical instrument for in-situ Raman microscopy suitable for collecting high-quality spectroscopic data during the indentation of glasses. Experimental conditions for ex-situ Raman mapping will be discussed under which indentations at milli-Newton force can be effectively studied. Possible pitfalls in ex-situ and in-situ measurements on indented glasses and resulting misinterpretations of spectral data will be highlighted.