Raman microscopy investigations of structural phase transformations in crystalline and amorphous silicon due to indentation with a Vickers diamond at room …

MM Khayyat, GK Banini, DG Hasko… - Journal of Physics D …, 2003 - iopscience.iop.org
Raman microscopy has been used to investigate phase transitions within Vickers diamond
residual indentations, made at room temperature and at 77 K, in single crystal Si (100) and …

Amorphization‐induced volume change and residual stresses in boron carbide

G Parsard, G Subhash, P Jannotti - Journal of the American …, 2018 - Wiley Online Library
The residual pressure surrounding quasistatic and dynamic Vickers indentations in boron
carbide was quantitatively mapped in 3 dimensions using Raman spectroscopy. These …

The thermoluminescence and optically stimulated luminescence properties of Cr-doped alpha alumina transparent ceramics

Q Liu, QH Yang, GG Zhao, SZ Lu, HJ Zhang - Journal of alloys and …, 2013 - Elsevier
Abstract Polycrystalline Cr: α-Al 2 O 3 transparent ceramics were fabricated by conventional
solid-state processing under vacuum condition. The SEM microstructure photographs of Cr …

Accurate ruby sensor for stress analysis in electronics

W Yang, FD Cortés-Vega, K Ahmadi… - ACS Applied …, 2022 - ACS Publications
In this work, we present a simple and cost-effective method to produce a stress sensor
based on the luminescence response of ruby thin films. The proposed sensor has a …

Residual stress distributions around indentations and scratches in polycrystalline Al2O3 and Al2O3/SiC nanocomposites measured using fluorescence probes

HZ Wu, SG Roberts, B Derby - Acta Materialia, 2008 - Elsevier
We report a study of the residual stress state around indentations and single-point scratches
in polycrystalline alumina and alumina/SiC nanocomposites using Cr3+ fluorescence …

Determination of residual stress distributions in polycrystalline alumina using fluorescence microscopy

CA Michaels, RF Cook - Materials & design, 2016 - Elsevier
Maps of residual stress distributions arising from anisotropic thermal expansion effects in a
polycrystalline alumina are generated using fluorescence microscopy. The shifts of both the …

[HTML][HTML] coefficients for stress, temperature, and composition effects in fluorescence measurements of alumina

RF Cook, CA Michaels - Journal of Research of the National …, 2017 - ncbi.nlm.nih.gov
The numerical coefficients linearly relating the effects of stress (including pressure),
temperature, and composition to shifts in the energies of the Cr-related fluorescence in …

Residual stress distributions around indentations and crack in 3Y-TZP ceramics measured using piezo spectroscopy

Q Jing, J Sun, F Zhang, L Lei, J Zhang - Ceramics International, 2023 - Elsevier
The residual stress state around indentation and crack in 3Y-TZP ceramics is studied by
piezo spectroscopy. The use priority of A1 (≈ 468 cm− 1) peak position is determined by …

Quantitative mapping of stress heterogeneity in polycrystalline alumina using hyperspectral fluorescence microscopy

GA Myers, CA Michaels, RF Cook - Acta materialia, 2016 - Elsevier
The microstructurally-induced heterogeneous stress fields arising in a series of Cr-doped
polycrystalline alumina materials are mapped with sub-micrometer sub-grain size resolution …

Room-temperature synthesis of χ-Al 2 O 3 and ruby (α-Cr: Al 2 O 3)

FD Cortes-Vega, W Yang, J Zarate-Medina… - …, 2018 - pubs.rsc.org
In this work, we present a unique crystal growth synthesis of χ-Al2O3 accompanied with α-
Cr: Al2O3 at room temperature. Raman spectroscopy and additions of Cr2O3 are key to …