Mechanical properties of synthetic type IIa diamond crystal

Sumiya, Hitoshi; Toda, Naohiro; Satoh, Shuichi

doi:10.1016/s0925-9635(97)00149-0

Cited by 98 publications

(50 citation statements)

References 9 publications

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“…We have investigated the mechanical properties of the synthetic type II a diamond by Knoop hardness measurement and by observation of the cleavage surfaces [7]. Figure 5 shows the Knoop hardness in the <100> directions on the (001) planes of the synthetic diamond plotted against the concentration of nitrogen impurity.…”

Section: -3 Mechanical Propertiesmentioning

confidence: 99%

“…Actually the synthetic diamond has higher resistance for plastic deformation, having high hardness and showing very smooth cleavage surface [7]. Therefore, synthetic type II a diamond crystals are expected to be very useful as diamond anvils.…”

Section: -3 Mechanical Propertiesmentioning

confidence: 99%

“…The high crystalline quality improves the mechanical and physical properties of the diamond [6,7]. These salient characteristics permits us to employ the crystals to hitherto-unexplored fields of industrial and scientific applications.…”

mentioning

confidence: 99%

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High-Quality Synthetic Diamond Crystals.

Sumiya¹,

Satoh²,

Yazu

1998

THE REVIEW OF HIGH PRESSURE SCIENCE AND TECHNOLOGY

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High-quality synthetic type IIa diamond crystals of several carats, containing less than 0.1 ppm chemical impurities and few inclusions, have been successfully synthesized by the temperature gradient method under high pressure and high temperature. The crystals are transparent over a wide range of wavelengths from ultraviolet to far infrared regions, showing no absorptions due to impurities.They also have high crystalline quality with fewer crystal defects, less internal strain, and less variation in defects among crystals than those of natural diamonds or conventional synthetic type Ib diamond. The outstanding characteristics of the synthetic type IN diamond permit application to a considerably wide range of industrial and scientific uses such as optical parts, monochromators, high-pressure anvils, and so on.[synthetic diamond, high pressure, crystal growth, impurity, dislocation]

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Section: -3 Mechanical Propertiesmentioning

confidence: 99%

Section: -3 Mechanical Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

High-Quality Synthetic Diamond Crystals.

Sumiya¹,

Satoh²,

Yazu

1998

THE REVIEW OF HIGH PRESSURE SCIENCE AND TECHNOLOGY

Self Cite

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“…As the well-known hardest traditional ultrahard material, diamond is of great interest for application and basic research [1]. However, its limitations in cutting iron and other ferrous metals greatly limits its application [2].…”

Section: Introductionmentioning

confidence: 99%

Theoretical Study on Electronic, Optical Properties and Hardness of Technetium Phosphides under High Pressure

Feng

Cheng

et al. 2017

Crystals

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Abstract:In this paper, the structural properties of technetium phosphides Tc 3 P and TcP 4 are investigated by first principles at zero pressure and compared with the experimental values. In addition, the electronic properties of these two crystals in the pressure range of 0-40 GPa are investigated. Further, we discuss the change in the optical properties of technetium phosphides at high pressures. At the end of our study, we focus on the research of the hardness of TcP 4 at different pressures by employing a semiempirical method, and the effect of pressure on the hardness is studied. Results show that the hardness of TcP 4 increases with the increasing pressure, and the influence mechanism of pressure effect on the hardness of TcP 4 is also discussed.

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“…The difference between the CVD and HPT methods is the impurity nitrogen in the diamond matrix; CVD-diamond has a negligible nitrogen impurity, while HPT-diamond generally has ppm-or sub-ppm-orders of nitrogen as an impurity. 22 Therefore, it should be interesting to investigate the effects of impurity nitrogen on the local structure and/or chemical states of dopant boron.…”

Section: Introductionmentioning

confidence: 99%