Metal-matrix diamond or cubic boron nitride composites
First Claim
1. A super-hard composite material comprising:
- a super-hard component representing about 40%-85% of the volume of the super-hard material;
a metal matrix component representing about 15%-60% of the volume of the super-hard material, the metal matrix component selected from the group of nickel, iron, cobalt, molybdenum, tungsten, niobium, tantalum, vanadium and alloys thereof; and
wherein the super-hard component and the metal matrix component are combined in a uniform composite mixture with an actual density at least 95% of the theoretical maximum density of the composite mixture.
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Accused Products
Abstract
A metal-matrix diamond or cubic boron nitride composite and method of making the same are disclosed. The metal-matrix/diamond composite includes grains of diamond uniformly distributed in a metal matrix. Alternatively, grains of cubic boron nitride may be used. Suitable metals for the metal matrix material may include nickel, cobalt, iron, and mixtures or alloys thereof. Other transition metals also may be used. The metal-matrix/diamond or metal-matrix/cubic boron nitride composite has high fracture toughness due to its fine microstructure. Such a metal-matrix/diamond or metal-matrix/cubic boron nitride composite is suitable for use in blanks or cutting elements for cutting tools, drill bits, dressing tools, and wear parts. It also may be used to make wire drawing dies.
43 Citations
21 Claims
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1. A super-hard composite material comprising:
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a super-hard component representing about 40%-85% of the volume of the super-hard material; a metal matrix component representing about 15%-60% of the volume of the super-hard material, the metal matrix component selected from the group of nickel, iron, cobalt, molybdenum, tungsten, niobium, tantalum, vanadium and alloys thereof; and wherein the super-hard component and the metal matrix component are combined in a uniform composite mixture with an actual density at least 95% of the theoretical maximum density of the composite mixture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A super-hard composite material comprising:
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a super-hard component representing about 40%-85% of the volume of the super-hard material; a metal matrix component representing about 15%-60% of the volume of the super-hard material, the metal matrix component selected from the group of nickel, iron, cobalt, molybdenum, tungsten, niobium, tantalum, vanadium and alloys thereof; and wherein the super-hard component and the metal matrix component are combined in a uniform composite mixture under cold compression so as to have an actual density at least 95% of the theoretical maximum density of the composite mixture. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A super-hard composite material comprising:
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a super-hard component representing about 40%-85% of the volume of the super-hard material; a metal matrix component representing about 15%-60% of the volume of the super-hard material, the metal matrix component selected from the group of nickel, iron, cobalt, molybdenum, tungsten, niobium, tantalum, vanadium and alloys thereof; and wherein the super-hard component and the metal matrix component are combined in a uniform composite mixture so as to have an actual density at least 95% of the theoretical maximum density of the composite mixture, and wherein particles of said super-hard component are substantially separated from each other by particles of said metal matrix component. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification