Practical Development of Binderless Nano-Polycrystalline Diamond

Cutting Characteristics of Binderless Diamond Tools in High-Speed Turning of Ti-6Al-4V - Availability of Single-Crystal and Nano-Polycrystalline Diamond -

Natural occurrence of pure nano-polycrystalline diamond from impact crater

Consolidated bodies of polycrystalline diamond with grain sizes less than 100 nm, nano-polycrystalline diamond (NPD), has been experimentally produced by direct conversion of graphite at high pressure and high temperature. NPD has superior hardness, toughness and wear resistance to single-crystalline diamonds because of its peculiar nano-textures, and has been successfully used for industrial a...

Diamond and Polycrystalline Diamond for MEMSApplications :

To date most of the MEMS devices are been based on Silicon. This is due to the technological know-how accumulated on manipulating, machining, manufacturing of Silicon. However, only very few devices involve moving parts. This is because of the rapid wear arising from high friction in these Silicon based systems. Recent tribometric experiments carried out by Gardos on Silicon and polycrystalline...

Large scale simulation of quantum-mechanical molecular dynamics for nano-polycrystalline diamond

Quantum-mechanical molecular-dynamics simulations are carried out to explore possible precursor states of nano-polycrystalline diamond, a novel ultra-hard material produced directly from graphite. Large-scale simulation with 10 atoms is realized by using the ‘orderN ’ simulation code ‘ELSES’ (http://www.elses.jp). The simulation starts with a diamond structure that contains initial structural d...

Glitch-free X-ray absorption spectrum under high pressure obtained using nano-polycrystalline diamond anvils

Nano-polycrystalline diamond (NPD) [Irifune et al. (2003), Nature (London), 421, 599] has been used to obtain a glitch-free X-ray absorption spectrum under high pressure. In the case of conventional single-crystal diamond (SCD) anvils, glitches owing to Bragg diffraction from the anvils are superimposed on X-ray absorption spectra. The glitch has long been a serious problem for high-pressure re...