Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Ultrahigh pressure sintering

Polycrystalline diamond or PCD is produced by sintering micron diamond powders under ultrahigh pressure (>5 GPa) in the presence of a metal catalyst such as cobalt. These materials are commercially available in a range of grain sizes and typically are... [Pg.1183]

Boron nitride is an entirely synthetic material (with no natural occurrence) and the cubic crystal structure is synthesized from the softer hexagonal (HBN) aUotrope using ultrahigh pressures as in the case of diamond. CBN crystals exhibit less than half the hardness of diamond, but there are no industrial applications for such materials. Instead, aU industrially relevant materials are polycrystal-Une in nature, produced by sintering micron cBN... [Pg.1183]

See other pages where Ultrahigh pressure sintering is mentioned: [Pg.319]    [Pg.320]    [Pg.1185]    [Pg.319]    [Pg.320]    [Pg.1185]    [Pg.107]    [Pg.54]    [Pg.223]    [Pg.320]    [Pg.398]    [Pg.503]    [Pg.499]    [Pg.2982]    [Pg.109]    [Pg.500]    [Pg.501]   
See also in sourсe #XX -- [ Pg.362 ]



SEARCH



Pressure sintering

© 2024 chempedia.info