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Ball-like diamond crystals

Figure 3, Diamond crystals grown from 1.5 vol. % CH4-H2 at 10 torr using a combined microwave and hot-filament CVD method, (a) Cube and octahedral faces, (b) twinned crystals with pseudo fivefold symmetry, (c) ball-like diamond grown at high supersaturations the scale in (a)-(b) is 12 pm and in (c) is 15 pm. (Reproduced u/idt pemtissionf American Association far the Advancement of Science, 1988.)... Figure 3, Diamond crystals grown from 1.5 vol. % CH4-H2 at 10 torr using a combined microwave and hot-filament CVD method, (a) Cube and octahedral faces, (b) twinned crystals with pseudo fivefold symmetry, (c) ball-like diamond grown at high supersaturations the scale in (a)-(b) is 12 pm and in (c) is 15 pm. (Reproduced u/idt pemtissionf American Association far the Advancement of Science, 1988.)...
In another HFCVD experiment, the influence of gas pressure on diamond film coverage and crystal size was studied. As shown in Fig. 6, the crystal size and surface coverage attain a maximum at 1.3 kPa ( 10 torr). Crystal quality and phase purity are both optimized around a pressure value of 4 kPa (30 torr). At 665 Pa ( 5 torr) an amorphous film covers the substrate and ball-like particles form. [Pg.38]

See other pages where Ball-like diamond crystals is mentioned: [Pg.135]    [Pg.67]    [Pg.136]    [Pg.15]    [Pg.875]    [Pg.558]    [Pg.558]    [Pg.145]    [Pg.831]    [Pg.739]   
See also in sourсe #XX -- [ Pg.10 ]



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