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Title: High pressure studies using two-stage diamond micro-anvils grown by chemical vapor deposition

Abstract

Ultra-high static pressures have been achieved in the laboratory using a two-stage micro-ball nanodiamond anvils as well as a two-stage micro-paired diamond anvils machined using a focused ion-beam system. The two-stage diamond anvils’ designs implemented thus far suffer from a limitation of one diamond anvil sliding past another anvil at extreme conditions. We describe a new method of fabricating two-stage diamond micro-anvils using a tungsten mask on a standard diamond anvil followed by microwave plasma chemical vapor deposition (CVD) homoepitaxial diamond growth. A prototype two stage diamond anvil with 300 μm culet and with a CVD diamond second stage of 50 μm in diameter was fabricated. We have carried out preliminary high pressure X-ray diffraction studies on a sample of rare-earth metal lutetium sample with a copper pressure standard to 86 GPa. Furthermore, the micro-anvil grown by CVD remained intact during indentation of gasket as well as on decompression from the highest pressure of 86 GPa.

Authors:
 [1];  [1];  [1];  [1];  [1];  [2]
  1. Univ. of Alabama at Birmingham, Birmingham, AL (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Univ. of Alabama at Birmingham, Birmingham, AL (United States); Carnegie Institution of Washington, Washington, D.C. (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Legacy Management (LM), Office of Site Operations (LM-20)
OSTI Identifier:
1251190
Alternate Identifier(s):
OSTI ID: 1335881
Grant/Contract Number:  
NA0002014; NA0002006
Resource Type:
Accepted Manuscript
Journal Name:
High Pressure Research
Additional Journal Information:
Journal Volume: 35; Journal Issue: 3; Journal ID: ISSN 0895-7959
Publisher:
Taylor & Francis
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; high pressure techniques; diamond growth; micro X-ray diffraction; rare-earth metals; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; micro x-ray diffraction; rare earth metals

Citation Formats

Vohra, Yogesh K., Samudrala, Gopi K., Moore, Samuel L., Montgomery, Jeffrey M., Tsoi, Georgiy M., and Velisavljevic, Nenad. High pressure studies using two-stage diamond micro-anvils grown by chemical vapor deposition. United States: N. p., 2015. Web. doi:10.1080/08957959.2015.1053881.
Vohra, Yogesh K., Samudrala, Gopi K., Moore, Samuel L., Montgomery, Jeffrey M., Tsoi, Georgiy M., & Velisavljevic, Nenad. High pressure studies using two-stage diamond micro-anvils grown by chemical vapor deposition. United States. doi:10.1080/08957959.2015.1053881.
Vohra, Yogesh K., Samudrala, Gopi K., Moore, Samuel L., Montgomery, Jeffrey M., Tsoi, Georgiy M., and Velisavljevic, Nenad. Wed . "High pressure studies using two-stage diamond micro-anvils grown by chemical vapor deposition". United States. doi:10.1080/08957959.2015.1053881. https://www.osti.gov/servlets/purl/1251190.
@article{osti_1251190,
title = {High pressure studies using two-stage diamond micro-anvils grown by chemical vapor deposition},
author = {Vohra, Yogesh K. and Samudrala, Gopi K. and Moore, Samuel L. and Montgomery, Jeffrey M. and Tsoi, Georgiy M. and Velisavljevic, Nenad},
abstractNote = {Ultra-high static pressures have been achieved in the laboratory using a two-stage micro-ball nanodiamond anvils as well as a two-stage micro-paired diamond anvils machined using a focused ion-beam system. The two-stage diamond anvils’ designs implemented thus far suffer from a limitation of one diamond anvil sliding past another anvil at extreme conditions. We describe a new method of fabricating two-stage diamond micro-anvils using a tungsten mask on a standard diamond anvil followed by microwave plasma chemical vapor deposition (CVD) homoepitaxial diamond growth. A prototype two stage diamond anvil with 300 μm culet and with a CVD diamond second stage of 50 μm in diameter was fabricated. We have carried out preliminary high pressure X-ray diffraction studies on a sample of rare-earth metal lutetium sample with a copper pressure standard to 86 GPa. Furthermore, the micro-anvil grown by CVD remained intact during indentation of gasket as well as on decompression from the highest pressure of 86 GPa.},
doi = {10.1080/08957959.2015.1053881},
journal = {High Pressure Research},
number = 3,
volume = 35,
place = {United States},
year = {2015},
month = {6}
}

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