Low substrate temperature deposition of diamond coatings derived from glassy carbon
- Oak Ridge, TN
A process for depositing a diamond coating on a substrate at temperatures less than about 550.degree. C. A powder mixture of glassy carbon and diamond particles is passed through a high velocity oxy-flame apparatus whereupon the powders are heated prior to impingement at high velocity against the substrate. The powder mixture contains between 5 and 50 powder volume percent of the diamond particles, and preferably between 5 and 15 powder volume percent. The particles have a size from about 5 to about 100 micrometers, with the diamond particles being about 5 to about 30 micrometers. The flame of the apparatus provides a velocity of about 350 to about 1000 meters per second, with the result that upon impingement upon the substrate, the glassy carbon is phase transformed to diamond as coaxed by the diamond content of the powder mixture.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- AC05-84OR21400
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 5453303
- OSTI ID:
- 870081
- Country of Publication:
- United States
- Language:
- English
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temperature
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diamond
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derived
glassy
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process
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coating
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550
degree
powder
mixture
particles
passed
velocity
oxy-flame
apparatus
whereupon
powders
heated
prior
impingement
contains
50
volume
percent
preferably
15
size
100
micrometers
30
flame
provides
350
1000
meters
result
phase
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coaxed
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temperature deposition
diamond particles
diamond coating
apparatus provides
volume percent
glassy carbon
substrate temperature
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