Photoluminescence Spectroscopy to Determine Residual Stresses in Glass-to-Metal Seals
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
In components with two materials, such as glass-to-metal (GtM) seals, residual stress can reduce long-term reliability. Therefore, it is important to be able to accurately measure residual stress within these components. The residual stress can be from a large strain due to the mismatch of thermo-physical response of the two materials or a small strain due to stress and/or structural relaxation. Both modeling and experimental measurements were conducted on multiple GtM seals constructed with CGI 930 glass with purposely added alumina particles. The alumina particles have an established Cr fluorescence pattern and the shift in position of these peaks can accurately measure the strain of the alumina crystals. Photoluminescence spectroscopy (PLS) technique was utilized due to its non-destructive nature and high spatial resolution. PLS scans of these components were analyzed and compared to the models developed previously.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- DOE Contract Number:
- AC04-94AL85000; NA0003525
- OSTI ID:
- 1592889
- Report Number(s):
- SAND-2019-15204R; 682139
- Country of Publication:
- United States
- Language:
- English
Similar Records
Characterization & Modeling of Materials in Glass-To-Metal Seals: Part I
Stress Mapping in Glass-to-Metal Seals using Indentation Crack Lengths.