Correlation between the Nitrogen Impurity Content and the Crystal Habit of Synthetic Diamond

Nature ◽  
1968 ◽  
Vol 218 (5148) ◽  
pp. 1246-1247 ◽  
Author(s):  
B. R. ANGEL ◽  
M. J. A. SMITH ◽  
J. J. CHARETTE
Keyword(s):  
Synthetic Diamond ◽  
Impurity Content ◽  
Crystal Habit ◽  
Nitrogen Impurity

The effects of nitrogen impurity on the radiation detection properties of synthetic diamond

1991 ◽  
Vol 116 (3) ◽  
pp. 233-252 ◽  
Author(s):  
T. L. Nam ◽  
U. Karfunkel ◽  
R. J. Keddy ◽  
A. G. Every
Keyword(s):  
Synthetic Diamond ◽  
Radiation Detection ◽  
Nitrogen Impurity

A Study on the Methods for Precise Sorting of Synthetic Diamond Abrasives

2006 ◽  
Vol 304-305 ◽  
pp. 66-70 ◽  
Author(s):  
Zhong Ping Luo ◽  
Ya Lin Yao
Keyword(s):  
Fracture Property ◽  
Synthetic Diamond ◽  
Impurity Content ◽  
Impurity Distribution ◽  
Operational Performance ◽  
Abrasive Tool ◽  
Crystal Shape ◽  
Abrasive Grains ◽  
Grain Sizes ◽  
Abrasive Grain

In an abrasive tool the abrasive is the main part undertaking grinding work, thus, the grinding effects mainly depend on the types and properties of the abrasive. The strength and fracture property of the abrasive grain in a synthetic diamond abrasive tool have a direct influence on the operational performance of the tool. Generally, it is expected that the strength and protrusion height of the grain are as same as possible. The strength and fragmenting property of the abrasive grain hinge on its crystal shape and regularity and completeness, internal vice, impurity content and impurity distribution pattern. The abrasive grains must be sorted and classified to make their grain sizes and their properties consistent with each and all. In this paper, the author discusses the basic properties and related performances of synthetic diamond abrasives. Elementary discussion is made separately on improving the vibration sorting, introducing the magnetic separation, applying the heavy liquid separation, exploring the floatation technology and using the selective fragmentation principle. In addition, here are presented the basic methods for precise sorting of synthetic diamond abrasives and their general principles. Practices have proved these methods effective and feasible.

Strain and Impurity Content of Synthetic Diamond Crystals

1994 ◽  
Vol 349 ◽  
Author(s):  
T. L. Mccormick ◽  
W. E. Jackson ◽  
R.J. Nemanich
Keyword(s):  
Raman Spectroscopy ◽  
High Pressure ◽  
Synthetic Diamond ◽  
Impurity Content ◽  
Nitrogen Forms ◽  
Inclusion Content ◽  
Diamond Crystals ◽  
High Pressure High Temperature ◽  
Photoluminescence Studies ◽  
Integrated Intensities

ABSTRACTSamples of diamond crystals produced under various high pressure, high temperature conditions were studied using both micro photoluminescence and Raman spectroscopy. The 0.3 - 0.6 mm sized samples exhibited various levels of inclusion content, impurity content and strain. Photoluminescence studies revealed the presence of nitrogen in three forms. The 1.945 eV, 2.15 eV and 2.46 eV zero phonon lines and their associated sidebands were detected. The ratios between forms of impurities and their integrated intensities varied between samples. Variations in the distribution of the nitrogen forms were seen between regions of high and low strain birefringence patterns.

Fractionation of nitrogen isotopes in a synthetic diamond of mixed crystal habit

Nature ◽  
1988 ◽  
Vol 331 (6157) ◽  
pp. 604-607 ◽  
Author(s):  
S. R. Boyd ◽  
C. T. Pillinger ◽  
H. J. Milledge ◽  
M. J. Mendelssohn ◽  
M. Seal
Keyword(s):  
Mixed Crystal ◽  
Nitrogen Isotopes ◽  
Synthetic Diamond ◽  
Crystal Habit

Effect of sulfur on diamond growth and morphology in metal–carbon systems

CrystEngComm ◽  
2020 ◽  
Vol 22 (33) ◽  
pp. 5497-5508
Author(s):  
Yuri N. Palyanov ◽  
Yuri M. Borzdov ◽  
Alexander F. Khokhryakov ◽  
Yuliya V. Bataleva ◽  
Igor N. Kupriyanov
Keyword(s):  
Crystal Morphology ◽  
Diamond Crystal ◽  
Impurity Content ◽  
Diamond Growth ◽  
Nitrogen Impurity ◽  
Diamond Crystallization

Sulfur additives inhibit diamond crystallization in the Fe–Ni–C system at 6 GPa and 1400 °C and affect the diamond crystal morphology and nitrogen impurity content.

The characterization of strain, impurity content, and crush strength of synthetic diamond crystals

1997 ◽  
Vol 12 (1) ◽  
pp. 253-263 ◽  
Author(s):  
Terri L. McCormick ◽  
W. E. Jackson ◽  
R. J. Nemanich
Keyword(s):  
High Pressure ◽  
High Strain ◽  
Synthetic Diamond ◽  
Impurity Content ◽  
Inclusion Content ◽  
Diamond Crystals ◽  
High Pressure High Temperature ◽  
Two Samples ◽  
Crush Strength

This study addresses the correlation of the macroscopic and microscopic characteristics of synthetic diamond crystals produced by high pressure, high temperature conditions. Microscopic properties were characterized using Raman spectroscopy, birefringence, and photoluminescence (PL). Macroscopic properties characterized included inclusion content and crush force. Raman measurements detected measurable stress shifts in only two samples. The PL measurements indicated an increased presence of the H3 center in areas of high strain. The absence of the H3 center and the presence of the N-V PL center was correlated to lower average crush force. A hierarchy has been developed that relates microscopic properties to average crush force.

Effect of nitrogen impurity on the dislocation structure of large HPHT synthetic diamond crystals

2014 ◽  
Vol 386 ◽  
pp. 162-167 ◽  
Author(s):  
Alexander F. Khokhryakov ◽  
Yuri N. Palyanov ◽  
Igor N. Kupriyanov ◽  
Yuri M. Borzdov ◽  
Alexander G. Sokol
Keyword(s):  
Dislocation Structure ◽  
Synthetic Diamond ◽  
Diamond Crystals ◽  
Nitrogen Impurity

Differences in morphology and impurity content of synthetic diamond grown from molten nickel

1990 ◽  
Vol 99 (1-4) ◽  
pp. 1183-1187 ◽  
Author(s):  
Hisao Kanda ◽  
Toshikazu Ohsawa ◽  
Shinobu Yamaoka
Keyword(s):  
Synthetic Diamond ◽  
Impurity Content ◽  
Molten Nickel

Effect of nitrogen impurity on etching of synthetic diamond crystals

2015 ◽  
Vol 430 ◽  
pp. 71-74 ◽  
Author(s):  
Alexander F. Khokhryakov ◽  
Yuri N. Palyanov
Keyword(s):  
Synthetic Diamond ◽  
Diamond Crystals ◽  
Nitrogen Impurity

Nitrogen impurity centers in synthetic diamond powder

1966 ◽  
Vol 1 (3) ◽  
pp. 237-240 ◽  
Author(s):  
G. S. Danil'chuk ◽  
L. N. Ganyuk ◽  
A. E. Koval'skii ◽  
P. P. Pogoretskii ◽  
G. A. Podzyarei ◽  
...  
Keyword(s):  
Synthetic Diamond ◽  
Diamond Powder ◽  
Nitrogen Impurity ◽  
Impurity Centers ◽  
Synthetic Diamond Powder
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