Results 11 to 20 of about 5,777 (160)

Research progress of spectra and properties of ultrahard carbon materials at high pressure and high temperature

open access: yesFunctional Diamond, 2022
Carbon, the fourth most abundant element in the Universe, possesses numerous allotropes with diverse bonding character (sp1-, sp2- and sp3-hybridized bonds) and structural motif of the constituting atoms.
Zhiqiang Hou   +6 more
doaj   +1 more source

Growth and Characterization of Polycrystalline CVD Diamond Films Obtained by MWPACVD at High Power 2,45GHz Microwave Discharge [PDF]

open access: yesMaterials Research, 2022
Among all the allotropic forms of carbon, diamond has attracted a broad scientific and technological interest for its extreme and unique properties rarely matched by other materials in nature.
J. V. Silva Neto   +3 more
doaj   +1 more source

Influence of polycrystalline diamond compact bit geometric parameters on drilling performance during gas drainage borehole in soft coal seam

open access: yesAdvances in Mechanical Engineering, 2018
Polycrystalline diamond compact bit is the main rock-breaking tool of gas drainage borehole. In order to investigate the influence of geometric parameters of polycrystalline diamond bit on its drilling performance, the integrated force model of ...
Xiaoming Han   +4 more
doaj   +1 more source

Bionic coupling polycrystalline diamond composite bit

open access: yesPetroleum Exploration and Development, 2014
Bionic coupling polycrystalline diamond compact (PDC) was designed according to the biological coupling theory, its performance was evaluated by wear resistance experiment, and then the bionic coupling PDC bit was made and used in field drilling test ...
Ke GAO   +5 more
doaj   +1 more source

Design and test of a self-adaptive bionic polycrystalline diamond compact bit inspired by cat claw

open access: yesAdvances in Mechanical Engineering, 2018
Cats protract claws while hunting or pawing on the ground and retract to muscles when relaxing. Inspired by this behavior, and in order to solve the problem of short service life and low comprehensive drilling efficiency of polycrystalline diamond ...
Qiongqiong Tang   +6 more
doaj   +1 more source

Wafer-Scale Polishing of Polycrystalline MPACVD-Diamond

open access: yesSurfaces, 2022
Diamond offers great potential for use as a thermal spreader in various applications, including power electronics and radio-frequency (RF) applications. However, to be used as an efficient thermal spreader, the atomically smooth surface of the diamond is
Xuerun Huang   +4 more
doaj   +1 more source

Geometry and force modeling, and mechanical properties study of polycrystalline diamond compact bit under wearing condition based on numerical analysis

open access: yesAdvances in Mechanical Engineering, 2017
Polycrystalline diamond compact bit has been used in more than 90% drilling length all over the world. Tooth wear is the main factor reducing the service life and performance of the polycrystalline diamond compact bit.
Zhiqiang Huang   +3 more
doaj   +1 more source

Thermal softening-suppressed inter-granular embrittlement of polycrystalline 3C-SiC under diamond cutting

open access: yesMaterials & Design, 2022
While the deformation behavior of grain boundaries has a strong impact on the mechanical response of polycrystalline materials, investigating the coupled thermal–mechanical properties of grain boundaries in their real formats is crucial for enhancing the
Liang Zhao   +5 more
doaj   +1 more source

A theoretical and deep learning hybrid model for predicting surface roughness of diamond-turned polycrystalline materials

open access: yesInternational Journal of Extreme Manufacturing, 2023
Polycrystalline materials are extensively employed in industry. Its surface roughness significantly affects the working performance. Material defects, particularly grain boundaries, have a great impact on the achieved surface roughness of polycrystalline
Chunlei He   +5 more
doaj   +1 more source

Towards diamond micro four-point probes

open access: yesMicro and Nano Engineering, 2019
Diamond has extreme physical properties, and it is used for critical applications in micro- and nanotechnology and nanosciences. Micro four-point probes for electrical characterization of metal and semiconductor thin-films are made from metal coated ...
Anpan Han   +4 more
doaj   +1 more source

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