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US 4,627,503 AGranted
Multiple layer polycrystalline diamond compact
AssigneeMegadiamond Industries, Inc.
InventorM. Duane Horton
Life of this patent
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AssigneeMegadiamond Industries, Inc.
InventorM. Duane Horton
Estimating the term…
A polycrystalline diamond and metal element for use as a cutting element for drilling holes or similar uses. The cutting element comprises a polycrystalline diamond center portion and at least one metal side portion. The metal side portion is made from a soft metal having a Young's Modulus less than approximately 45.times.10.sup.6 psi and is selected from a group comprising cobalt, nickel, iron, copper, silver, gold, platinum, palladium and alloys of these metals and intermetallic compounds containing these metals. Since the metal portion is sufficiently yielding the internal stresses formed in the polycrystalline diamond/metal bond during cooling and subsequent attachment to a tool body are signficantly reduced. The reduction the stress in the polycrystalline diamond/metal bond reduces fracturing in the diamond or metal and delamination of the polycrystalline diamond/metal interface during attachment to the tool and during use.
A cutting element having a center layer of polycrystalline material, an exposed side layer said side layer being directly bonded to the polycrystalline material layer without an intervening layer, and an exposed opposite side layer of material having a Young's Modulus less than approximately 45.times.10.sup.6 psi said opposite side layer being directly to the polycrystalline material layer without an intervening layer.
A cutting element having a center layer of polycrystalline material, an exposed side layer of material having a Young's Modulus less than approximately 45.times.10.sup.6 psi said side layer being directly bonded to the polycrystalline material layer without an intervening layer, and an exposed opposite side layer of material also having a Young's Modulus less than approximately 45.times.10.sup.6 psi and said opposite side layer also being directly to the polycrystalline material layer without an intervening layer.
A rotary bit having a shaft defining an axis of rotation, and a cutting element connected to one end of said shaft, said cutting element comprising:
A rotary bit having a shaft defining an axis of rotation, and a cutting element connected to one end of said shaft, said cutting element comprising:
Dependencies are inferred from the claim text.