The manufacturing and the application of polycrystalline diamond tools – A comprehensive review

Ultrafine‐grained B6O–diamond composites with superb mechanical properties

“…56 GPa in nanoindentation hardness and avg. 52 GPa in Vickers hardness) of the resulted composite at 25 GPa and 1400°C is comparable to those of high‐quality commercial superhard materials, such as polycrystalline cBN (PCBN) 30 (∼30 GPa in Knoop hardness) and PCD 31 (∼50 GPa in Knoop hardness). Meanwhile, the B 6 O–diamond composites synthesized at 25 GPa and 1400°C also exhibited an extraordinary fracture toughness of avg.…”

Introductory Chapter: Engineering Applications of Diamond

“…Hardness* [16] 100 GPa Grinding abrasive, Cutting tool [17,18], Tribology [19][20][21] [34][35][36] Negative electron affinity −1.5 eV (H-terminated) Electron field emitter [37] IR to UV optical transparency UV cut off @ 225 nm & absorptions at 2.5-6.5 μm with theoretical 71% transmission Photonics [38,39], Power transmission windows [40], Jewellery [41], Quantum computing [42][43][44] Absorption co-efficient ≤ 0.10 cm −1 at 10 μm Refractive index 2.38 @ 10 μm, 2.41 @ 500 nm Photoluminescence Nitrogen NV, silicon SiV vacancy centres Corrosion resistant Chemically inert to acids Electrodes in electro-chemical cells [45] Biocompatible Inert to biological cells [46] Medical devices [14] Radiation hard 43 eV atomic displacement energy Nuclear detector [47,48], instruments [49]…”

Kinetic Modeling of Grain Boundary Diffusion: Typical, Bi-Modal, and Semi-Lamellar Polycrystalline Coating Morphologies

“…Polycrystalline coatings and materials have shown great functional and structural potential and outstanding mechanical and physical properties [1]. Alloys, metals, and ceramics with a polycrystalline microstructure are widely used in engineering applications, including but not limited to electronic devices [2], manufacturing [3], solar and fuel cells [4,5], structural materials [6], thin-film transistors [7], future fusion applications [8], scintillators [9], laser media [10], and light-emitting diodes [11]. Hence, it is important for both practical and phenomenological reasons to know and predict the kinetics and mass transport mechanisms in polycrystalline coatings.…”