scholarly journals Nanocrystalline diamond micro-anvil grown on single crystal diamond as a generator of ultra-high pressures

AIP Advances ◽  
2016 ◽  
Vol 6 (9) ◽  
pp. 095027 ◽  
Author(s):  
Gopi K. Samudrala ◽  
Samuel L. Moore ◽  
Nenad Velisavljevic ◽  
Georgiy M. Tsoi ◽  
Paul A. Baker ◽  
...  
Keyword(s):  
Single Crystal ◽  
High Pressures ◽  
Nanocrystalline Diamond ◽  
Single Crystal Diamond

Application of Nitrogen-Doped Nanocrystalline Diamond Film on Partially Stabilized Zirconia for Pulverization Disk

2014 ◽  
Vol 1645 ◽  
Author(s):  
Kazuki Shiokawa ◽  
Takanori Mori ◽  
Atsushi Naka ◽  
Takehiko Matsumura ◽  
Tetsuya Suzuki
Keyword(s):  
Single Crystal ◽  
Adhesion Strength ◽  
Photoelectron Spectroscopy ◽  
Nanocrystalline Diamond ◽  
Stabilized Zirconia ◽  
Partially Stabilized Zirconia ◽  
Nitrogen Doped ◽  
As Doping ◽  
Single Crystal Diamond ◽  
Alternative Material

ABSTRACTWe report here partially stabilized zirconia (PSZ) matrix deposited with nanocrystalline diamond (NCD) films on its surface as an alternative material for pulverization disk with a potential of substituting high cost synthetic single crystal diamond. The deposition of NCD films on PSZ improved the characterization of the desorption-oxygen from PSZ matrix and enhanced the poor adhesion strength between NCD film and PSZ when N2 was used as doping gas. The results for X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy confirmed that with increasing N2 flow rate, nitrogen and desorption-oxygen were incorporated into film. The adhesion test and the pulverization test showed that enhancement in the adhesion strength as well as in the pulverization performance with increasing nitrogen and oxygen concentration in the NCD films. The results proposed to substitute a synthetic single crystal diamond with PSZ by coating nitrogen-doped NCD film.

Ultra-Strong and Catalyst-Free Polycrystalline Diamond Cutting Materials for One-Run-To-TD Game-Changing Drilling Technology

2021 ◽  
Author(s):  
Guodong David Zhan ◽  
Chinthaka Gooneratne ◽  
Timothy Eric Moellendick ◽  
Duanwei He ◽  
Jianhui Xu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Wear Resistance ◽  
Single Crystal ◽  
High Pressures ◽  
Impact Resistance ◽  
Polycrystalline Diamond ◽  
Processing Parameters ◽  
Catalyst Free ◽  
Single Crystal Diamond ◽  
Traditional Manufacturing

Abstract Polycrystalline diamond compact (PDC) bits have been increasing their application drilling many formations in the past 20+ years. However, their performance in drilling very hard, abrasive and interbedded formations still needs improvement. The main weak point comes from their primary cutting elements, PDC cutters, which still need improvements of wear resistance, impact resistance, and thermal stability. During the traditional manufacturing of the PDC cutters, cobalt catalyst has to be used to lower the pressure and temperature. In this study, we developed an ultra high pressure and high temperature (UHPHT) technology to make the PDC cutters without metallic catalyst into reality. Through this development, we can generate pressures of 14 GPa-35 GPa, which is three to seven times of that in the traditional PDC cutter manufacturing technology. In addition, the extreme high temperatures ranging from 1,900 °C to 2,300 °C are achieved, which is 500-900 °C higher than that in traditional process. Using this UHPHT technology, we successfully processed ultra-strong and catalyst-free PDC materials with two high pressures at 14 GPa and 16 GPa, respectively, to study the different responses of the material properties from different processing parameters. The new process applied industry available micro-sized synthetic diamond powders as starting material to eliminate the large volume shrinkage in phase transformation from graphite to diamond which is typically experienced in traditional manufacturing process. The hardness of the 14-GPa CFPCD materials reaches the top limit of the single crystal diamond, more than double that of the traditional PDC cutters. The material also possesses the near-metallic fracture toughness – more than two times of the traditional PDC cutters. Furthermore, the 16-GPa CFPCD material breaks all four single crystal diamond indenters in Vickers hardness tester, an indication of the world's hardest material in the family of diamonds. As a result, the material exhibits industry-recorded wear resistance and thermal stability. The combination of these breakthrough properties of the new CFPCD materials activates the goal in the effort of "One-Run-To-TD" in drilling operation, after the implementation of CFPCD materials as PDC cutters for PDC drill bits.

scholarly journals Epitaxial lateral growth of single-crystal diamond under high pressure by a plate-to-plate MPCVD

2021 ◽  
Vol 1 (1) ◽  
pp. 143-149
Author(s):  
Wei Cao ◽  
Deng Gao ◽  
Hongyang Zhao ◽  
Zhibin Ma
Keyword(s):  
High Pressure ◽  
Single Crystal ◽  
Lateral Growth ◽  
Single Crystal Diamond

On The Optimized Nucleation of Near-Single-Crystal Cvd Diamond Film

1995 ◽  
Vol 416 ◽  
Author(s):  
L. C. Chen ◽  
C. C. Juan ◽  
J. Y. Wu ◽  
K. H. Chen ◽  
J. W. Teng
Keyword(s):  
Single Crystal ◽  
Photoelectron Spectroscopy ◽  
Morphological Evolution ◽  
Present Report ◽  
Ex Situ ◽  
Nucleation Density ◽  
Induced Current ◽  
Current Time ◽  
Single Crystal Diamond

ABSTRACTNear-single-crystal diamond films have been obtained in a number of laboratories recently. The optimization of nucleation density by using a bias-enhanced nucleation (BEN) method is believed to be a critical step. However, the condition of optimized nucleation has never been clearly delineated. In the present report, a novel quantitative technique was established to monitor the nucleation of diamond in-situ. Specifically, the induced current was measured as a function of nucleation time during BEN. The timedependence of induced current was studied under various methane concentrations as well as substrate temperatures. The optimized nucleation condition can be unambiguously determined from the current-time plot. Besides the in-situ current probe, ex-situ x-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) were also used to investigate the chemical and morphological evolution. Characteristic XPS and AFM features of optimized nucleation is discussed.

Development of Diamond-Based X-ray Detection for High Flux Beamline Diagnostics

2009 ◽  
Vol 1203 ◽  
Author(s):  
Jen Bohon ◽  
John Smedley ◽  
Erik M. Muller ◽  
Jeffrey W. Keister
Keyword(s):  
Single Crystal ◽  
Linear Response ◽  
Voltage Dependence ◽  
Cvd Diamond ◽  
High Flux ◽  
National Synchrotron Light Source ◽  
X Ray ◽  
Single Crystal Diamond ◽  
Synchrotron Light ◽  
Pulse Structure

AbstractHigh quality single crystal and polycrystalline CVD diamond detectors with platinum contacts have been tested at the white beam X28C beamline at the National Synchrotron Light Source under high-flux conditions. The voltage dependence of these devices has been measured under DC and pulsed-bias conditions, establishing the presence or absence of photoconductive gain in each device. Linear response has been achieved over eleven orders of magnitude when combined with previous low flux studies. Temporal measurements with single crystal diamond detectors have resolved the ns scale pulse structure of the NSLS.

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