Development of Designer Diamond Technology for High Pressure High Temperature Experiments in Support of Stockpile Stewardship Program

Vohra, Yogesh, K.

关键词: CHEMISTRY;    DIAMONDS;    ELECTRIC CONDUCTIVITY;    FABRICATION;    LAWRENCE LIVERMORE NATIONAL LABORATORY;    MELTING;    NITROGEN;    PLASMA;    PRODUCTION;    RARE EARTHS;    STOCKPILES;    SUPERCONDUCTORS High-Pressure High-Temperature Research;    Chemical Vapor Deposited (CVD) Diamond;    Materials under Extreme Conditions;    Designer Diamonds;   

DOI  :  10.2172/966447
RP-ID  :  DOE/NA/26168-1
PID  :  OSTI ID: 966447
Others  :  TRN: US201004%%417

美国|英语

来源: SciTech Connect

【 摘 要 】

The role of nitrogen in the fabrication of designer diamond was systematically investigated by adding controlled amount of nitrogen in hydrogen/methane/oxygen plasma. This has led to a successful recipe for reproducible fabrication of designer diamond anvils for high-pressure high-temperature research in support of stockpile stewardship program. In the three-year support period, several designer diamonds fabricated with this new growth chemistry were utilized in high-pressure experiments at UAB and Lawrence Livermore National Laboratory. The designer diamond anvils were utilized in high-pressure studies on heavy rare earth metals, high pressure melting studies on metals, and electrical resistance measurements on iron-based layered superconductors under high pressures. The growth chemistry developed under NNSA support can be adapted for commercial production of designer diamonds.