Novel hard compositions and methods of preparation
Novel very hard compositions of matter are prepared by using in all embodiments only a minor amount of a particular carbide (or materials which can form the carbide in situ when subjected to heat and pressure); and no strategic cobalt is needed. Under a particular range of conditions, densified compositions of matter of the invention are prepared having hardnesses on the Rockwell A test substantially equal to the hardness of pure tungsten carbide and to two of the hardest commercial cobalt-bonded tungsten carbides. Alternately, other compositions of the invention which have slightly lower hardnesses than those described above in one embodiment also possess the advantage of requiring no tungsten and in another embodiment possess the advantage of having a good fracture toughness value.
- DOE Contract Number:
- W-7405-ENG-36
- Assignee:
- Dept. of Energy
- Application Number:
- ON: DE82004453
- OSTI ID:
- 5621277
- Country of Publication:
- United States
- Language:
- English
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Novel hard compositions and methods of preparation
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Related Subjects
BORON CARBIDES
HARDNESS
POWDER METALLURGY
IRON ALLOYS
NICKEL ALLOYS
TUNGSTEN BASE ALLOYS
HOT PRESSING
ALLOYS
BORON COMPOUNDS
CARBIDES
CARBON COMPOUNDS
FABRICATION
MATERIALS WORKING
MECHANICAL PROPERTIES
METALLURGY
PRESSING
TUNGSTEN ALLOYS
360101* - Metals & Alloys- Preparation & Fabrication
360103 - Metals & Alloys- Mechanical Properties