Onion-like carbon deposition by plasma spraying of nanodiamonds

✍ Scribed by Anna Valeryevna Gubarevich; Junya Kitamura; Shu Usuba; Hiroyuki Yokoi; Yozo Kakudate; Osamu Odawara

• Book ID: 104106711
• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 540 KB
• Volume: 41
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/s0008-6223(03)00338-5

✦ Synopsis

A deposit of carbon nanoparticles based on an onion-like structure was fabricated from detonation nanodiamond powders by a novel plasma spraying process, electromagnetically accelerated plasma spraying (EMAPS). EMAPS was able to transform nanodiamonds to onion-like structured carbon within 300 ms through a thermal graphitization process in which the temperature of the particles would be in the range of 2700-4500 K. Synthesized onion-like carbon nanoparticles were spherical or polyhedral. The G-band in the UV-Raman spectra of the produced deposits was found to be a superposition of a 21 21 characteristic band of well-formed carbon onions at 1571 cm and the G-band of defective carbon onions at 1592 cm . The availability of a plasma spraying process for developing solid lubricant coatings incorporating nanodiamond and onion-like carbon was demonstrated.