Titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition and a process for making the same
- Knoxville, TN
- Oak Ridge, TN
A ceramic composition is described. The ceramic composition consists essentially of from about 84 to 96 w/o titanium diboride, from about 1 to 9 w/o chromium diboride, and from about 3 to about 15 w/o yttrium-titanium-oxide. A method of making the ceramic composition is also described. The method of making the ceramic composition comprises the following steps: Step 1--A consolidated body containing stoichiometric quantities of titanium diboride and chromium diboride is provided. Step 2--The consolidated body is enclosed in and in contact with a thermally insulated package of yttria granules having a thickness of at least 0.5 inches. Step 3--The consolidated body enclosed in the thermally insulated package of yttria granules is heated in a microwave oven with microwave energy to a temperature equal to or greater than 1,900 degrees centigrade to sinter and uniformly disperse yttria particles having a size range from about 1 to about 12 microns throughout the consolidated body forming a densified body consisting essentially of titanium diboride, chromium diboride, and yttrium-titanium-oxide. The resulting densified body has enhanced fracture toughness and hardness.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- AC05-84OR21400
- Assignee:
- Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
- Patent Number(s):
- US 5013694
- OSTI ID:
- 867805
- Country of Publication:
- United States
- Language:
- English
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Process for making a titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition
Titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition and a process for making the same
Related Subjects
diboride-chromium
diboride-yttrium
oxide
ceramic
composition
process
described
consists
essentially
84
96
diboride
chromium
15
yttrium-titanium-oxide
method
comprises
following
steps
step
1-a
consolidated
containing
stoichiometric
quantities
provided
2-the
enclosed
contact
thermally
insulated
package
yttria
granules
thickness
inches
3-the
heated
microwave
oven
energy
temperature
equal
900
degrees
centigrade
sinter
uniformly
disperse
particles
size
range
12
microns
throughout
forming
densified
consisting
resulting
enhanced
fracture
toughness
hardness
chromium diboride
stoichiometric quantities
size range
titanium diboride
microwave oven
composition comprises
ceramic composition
fracture toughness
microwave energy
consisting essentially
consists essentially
titanium oxide
oxide ceramic
degrees centigrade
wave energy
thermally insulated
following steps
temperature equal
composition consists
titanium diboride-chromium
uniformly disperse
diboride-yttrium titanium
diboride-chromium diboride-yttrium
/501/219/