Nanolayered Diamond Sintered Compact Obtained by Direct Conversion from Highly Oriented Graphite under High Pressure and High Temperature

Autor:	Futoshi Isobe, Tetsuo Irifune, Hitoshi Sumiya, Hiroaki Ohfuji
Rok vydání:	2013
Předmět:	Materials science Article Subject Material properties of diamond Diamond engineering.material Indentation hardness Nanocrystal Highly oriented pyrolytic graphite lcsh:Technology (General) Knoop hardness test engineering lcsh:T1-995 General Materials Science Crystallite Graphite Composite material
Zdroj:	Journal of Nanomaterials, Vol 2013 (2013)
ISSN:	1687-4129 1687-4110
Popis:	A new type of polycrystalline sintered diamond has been successfully synthesized by direct conversion from highly oriented pyrolytic graphite at 15 GPa and 2300°C. It is optically transparent and consists entirely of layered nanocrystals (50–100 nm thick) of cubic diamond, which are tightly bound to each other and have strong [111] preferred orientation along the stacking direction. This nanolayered diamond has excellent indentation hardness (~114 GPa in Knoop scale) comparable to the highest values obtained from single crystalline diamond. Furthermore, it is expected to have significantly high wear resistance on both ends of cylindrical sintered compact, since the surfaces are terminated exclusively by the hardest{111}planes of the layered diamond nanocrystals.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::33b4a6e7b8f5c4aeebbbc6d9750d2066 https://doi.org/10.1155/2013/380165 Zobrazit plný text záznamu Plný text ve formátu PDF