Novel hard compositions and methods of preparation

Patent · Tue Feb 03 04:00:00 EST 1981

OSTI ID:5621277

Sheinberg, H

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
• Patent Number(s): None
• Application Number: ON: DE82004453
• OSTI ID: 5621277
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360103 -- Metals & Alloys-- Mechanical Properties
ALLOYS
BORON CARBIDES
BORON COMPOUNDS
CARBIDES
CARBON COMPOUNDS
FABRICATION
HARDNESS
HOT PRESSING
IRON ALLOYS
MATERIALS WORKING
MECHANICAL PROPERTIES
METALLURGY
NICKEL ALLOYS
POWDER METALLURGY
PRESSING
TUNGSTEN ALLOYS
TUNGSTEN BASE ALLOYS