Next Article in Journal
Deep Mineral Exploration of the Jinchuan Cu–Ni Sulfide Deposit Based on Aeromagnetic, Gravity, and CSAMT Methods
Previous Article in Journal
The Formation of Dunite Channels within Harzburgite in the Wadi Tayin Massif, Oman Ophiolite: Insights from Compositional Variability of Cr-Spinel and Olivine in Holes BA1B and BA3A, Oman Drilling Project
Previous Article in Special Issue
The Birth of Mineral Physics at the ANU in the 1970s
Open AccessArticle

Development of a Stress Sensor for In-Situ High-Pressure Deformation Experiments Using Radial X-ray Diffraction

1
Department of Geology and Geophysics, Yale University, New Haven, CT 06511, USA
2
Intel Ronler Acres Campus, 2501 NE Century Boulevard, Hillsboro, OR 97124, USA
3
Mineral Physics Institute, Stony Brook University, Stony Brook, NY 11794, USA
*
Author to whom correspondence should be addressed.
Minerals 2020, 10(2), 166; https://doi.org/10.3390/min10020166
Received: 30 December 2019 / Revised: 29 January 2020 / Accepted: 10 February 2020 / Published: 13 February 2020
(This article belongs to the Special Issue Mineral Physics—In Memory of Orson Anderson)
We developed a stress sensor for in-situ deformation experiments using synchrotron radial X-ray diffraction. This stress sensor provided nearly diffraction-plane-independent stress that, when used in series with a sample, reduced the uncertainty of the average stress estimation acting on a sample. Here, we present the results of a study where pyrope was used as a stress sensor. Using a Deformation-DIA (D-DIA) high-pressure deformation apparatus, pyrope, olivine and alumina were deformed in the same run/cell assembly placed in series along the compression direction. Deformation experiments were conducted at pressures between 4 and 5 GPa and temperatures between 730 and 1273 K with strain-rates between 10−5 and 10−6 s−1. Stresses estimated from various (hkl) planes in pyrope were nearly the same; i.e., pyrope is plastically isotropic with ≤10 % variation with (hkl). However, stresses from various (hkl) planes in olivine and alumina varied by approximately a factor of 3. Comparisons between average stresses inferred from pyrope and those from different diffraction planes in olivine and alumina showed that the average stress in these materials evolved from low-end stress, estimated from various (hkl) planes at small strain, to high-end stress at a large strain. This suggests that the rate-controlling slip system in these materials changes from the soft to the hard slip system with strain.
Keywords: high pressure; deformation; in-situ; D-DIA; stress sensor high pressure; deformation; in-situ; D-DIA; stress sensor
MDPI and ACS Style

Girard, J.; Silber, R.E.; Mohiuddin, A.; Chen, H.; Karato, S.-I. Development of a Stress Sensor for In-Situ High-Pressure Deformation Experiments Using Radial X-ray Diffraction. Minerals 2020, 10, 166.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop