Properties of ultrafine diamond clusters from detonation synthesis

The CH stretching features on diamonds of different origins

“…The 100 nm synthetic diamonds with a particle size distribution centered on 100 nm were obtained from Kay Industrial Diamond (USA). Other diamond, obtained from Toron (Russia), which has a remarkable narrow particle size distribution of 5 T 1 nm in diameter was synthesized from TNT/RDX (50/50) mixtures in a detonation chamber [15]. Orgueil diamonds (average sizes of the order of 2-3 nm) were extracted from a portion of presolar meteorite Orgueil [16].…”

Synthesis of Diamond Using Spark Plasma Sintering

“…One of the most outstanding achievements in carbon science was the synthesis of diamond from graphite under high-pressure and high-temperature (HPHT) conditions (Giardini et al, 1960). Since diamond particles and films have now been obtained by many other methods including detonation (Vereschagin et al, 1994), combustion flames (Hirose et al, 1990) and chemical vapour deposition (CVD) with RF plasma (Watanabe et al, 1992) or microwave plasma (Kobashi et al, 1988) etc., the HPHT method is still the most popular commercial method for the diamond synthesis. Nowadays, man-made diamond plays an indispensable role in modern industry for abrasives, tool coatings, microelectronics, optics and other applications.…”

Structure and mechanical behavior of Al–Al4C3 composites

“…The amount of the reinforcement added to the alloy in the course of casting was 0.16 and 1.3 vol.%. Mechanical tests of tension specimens [6] have revealed that the yield stress σ 02 increases substantially with increase in the aluminum carbide content. For 0.16 and 1.3 vol.% Al 4 C 3 , σ 02 = 55 and 60 MPa, respectively, whereas in initial aluminum alloy AK7, σ 02 = 35 MPa.…”

“…The initial components used were nanopowders of aluminum produced by electric explosion of wires [5] and carbon in the form of detonation diamonds [6]. Following the hot pressing technique described in [4], composites were fabricated in an argon atmosphere at a temperature of 873 K and pressure of 30 MPa, with the carbon content in the materials being 5 or 10%.…”