Formation of large diamond crystals in oxyacetylene flame chemical vapour deposition
Apstrakt
Diamond coatings were deposited on diamond-polished molybdenum substrates from a premixed oxyacetylene flame for a long time (up to 4 h) at substrate temperatures between 700 and 950 degrees C, acetylene-to-oxygen ratios 1.02-1.07 and total flow rates between 230 and 310 standard L h(-1). The coatings contain, in addition to the densely populated octahedral crystals making a continuous layer of determined thickness, a number of individual large cuboctahedral crystals sticking out far above the layer. A large cuboctahedral crystal is formed from an octahedral one when the latter reaches a certain height at which its temperature becomes sufficiently high for the octahedron-to-cuboctahedron conversion to take place. This conversion was found to occur by a flattening of the octahedron pyramid tip whereby a {1 0 0} face perpendicular to the growth direction is formed. Both the height of the crystal and size of the {1 0 0} face increase upon further deposition, reaching up to 230 mu m above ...the octahedral crystals layer and up to about 200 mu m, respectively. The large crystals have smooth {1 0 0} faces, but otherwise often have an irregular shape which may be due to high temperature favouring deposition of non-diamond carbon.
Izvor:
Journal of Materials Science, 1996, 31, 22, 5999-6003
DOI: 10.1007/BF01152151
ISSN: 0022-2461
WoS: A1996VU99300021
Scopus: 2-s2.0-0030291071
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Marinković, Slobodan N. AU - Zec, Slavica PY - 1996 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2023 AB - Diamond coatings were deposited on diamond-polished molybdenum substrates from a premixed oxyacetylene flame for a long time (up to 4 h) at substrate temperatures between 700 and 950 degrees C, acetylene-to-oxygen ratios 1.02-1.07 and total flow rates between 230 and 310 standard L h(-1). The coatings contain, in addition to the densely populated octahedral crystals making a continuous layer of determined thickness, a number of individual large cuboctahedral crystals sticking out far above the layer. A large cuboctahedral crystal is formed from an octahedral one when the latter reaches a certain height at which its temperature becomes sufficiently high for the octahedron-to-cuboctahedron conversion to take place. This conversion was found to occur by a flattening of the octahedron pyramid tip whereby a {1 0 0} face perpendicular to the growth direction is formed. Both the height of the crystal and size of the {1 0 0} face increase upon further deposition, reaching up to 230 mu m above the octahedral crystals layer and up to about 200 mu m, respectively. The large crystals have smooth {1 0 0} faces, but otherwise often have an irregular shape which may be due to high temperature favouring deposition of non-diamond carbon. T2 - Journal of Materials Science T1 - Formation of large diamond crystals in oxyacetylene flame chemical vapour deposition VL - 31 IS - 22 SP - 5999 EP - 6003 DO - 10.1007/BF01152151 ER -
@article{ author = "Marinković, Slobodan N. and Zec, Slavica", year = "1996", abstract = "Diamond coatings were deposited on diamond-polished molybdenum substrates from a premixed oxyacetylene flame for a long time (up to 4 h) at substrate temperatures between 700 and 950 degrees C, acetylene-to-oxygen ratios 1.02-1.07 and total flow rates between 230 and 310 standard L h(-1). The coatings contain, in addition to the densely populated octahedral crystals making a continuous layer of determined thickness, a number of individual large cuboctahedral crystals sticking out far above the layer. A large cuboctahedral crystal is formed from an octahedral one when the latter reaches a certain height at which its temperature becomes sufficiently high for the octahedron-to-cuboctahedron conversion to take place. This conversion was found to occur by a flattening of the octahedron pyramid tip whereby a {1 0 0} face perpendicular to the growth direction is formed. Both the height of the crystal and size of the {1 0 0} face increase upon further deposition, reaching up to 230 mu m above the octahedral crystals layer and up to about 200 mu m, respectively. The large crystals have smooth {1 0 0} faces, but otherwise often have an irregular shape which may be due to high temperature favouring deposition of non-diamond carbon.", journal = "Journal of Materials Science", title = "Formation of large diamond crystals in oxyacetylene flame chemical vapour deposition", volume = "31", number = "22", pages = "5999-6003", doi = "10.1007/BF01152151" }
Marinković, S. N.,& Zec, S.. (1996). Formation of large diamond crystals in oxyacetylene flame chemical vapour deposition. in Journal of Materials Science, 31(22), 5999-6003. https://doi.org/10.1007/BF01152151
Marinković SN, Zec S. Formation of large diamond crystals in oxyacetylene flame chemical vapour deposition. in Journal of Materials Science. 1996;31(22):5999-6003. doi:10.1007/BF01152151 .
Marinković, Slobodan N., Zec, Slavica, "Formation of large diamond crystals in oxyacetylene flame chemical vapour deposition" in Journal of Materials Science, 31, no. 22 (1996):5999-6003, https://doi.org/10.1007/BF01152151 . .