US 5,116,568 AGranted

Method for low pressure bonding of PCD bodies

AssigneeNorton Company

InventorsChien-Min Sung, Sy-Hwa Chen

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Abstract

An improved temperature stable synthetic polycrystalline diamond (PCD) product includes at least one temperature stable PCD integrally and chemically bonded to a matrix carrier support through a carbide forming layer which is of a thickness of at least about 1 micron, the layer on at least one surface of the PCD is in turn is bonded to the matrix carrier. A wide variety of shapes, sizes and configurations of such products is achieved through relatively low temperature and relatively low pressure processing. Various products of various geometries are described as well as the details of the processing to achieve chemical bonding of the PCD elements in a variety of support matrix carrier materials to form a unitary structure having a temperature stability up to about 1,200 degrees C.

Claims17

Dependent claims

A method of forming a temperature staple synthetic diamond product having a temperature stability up to about 1200.degree. C. from a temperature stable synthetic diamond element of a predetermined geometric shape, comprising

coating at least a portion of the surface of said temperature stable synthetic diamond element with a carbide forming metal to form a substantially uniform metallic coating at least about 1 micron thick,
placing said coated portion of said synthetic diamond element in contact with a matrix material, and
heating said coated synthetic diamond element and said matrix material under carbide forming conditions so as to convert said metallic coating into an inner carbide layer chemically bonded to said diamond element and a substantially metallic outer layer which is chemically bonded to said matrix material, said carbide layer bonding said diamond element to said matrix material with a bond strength in shear of at least 5,000 pounds per square inch.

Dependencies are inferred from the claim text.

Facts

Application: 07/708,761Filed 31 May 1991 · continuation
Priority: 20 Oct 1986
Granted: 26 May 1992
Term ends: Not estimatedThe source records don’t support an estimate.

Classification23 codes

E21B 10/5676
With preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts: having a cutting face with different segments, e.g.…
B22F 7/06
Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting…
B23B 27/145
Specially shaped plate-like cutting inserts, i.e. length greater or equal to width, width greater than or equal to thickness: characterised by…
B23D 61/04
Circular saw blades: with inserted saw teeth , i.e. the teeth being individually inserted

Family

Serial921,364Parent of this continuation-in-part · filed 20 Oct 1986
Serial61,705Parent of this continuation-in-part · filed 11 Jun 1987
Serial95,054Parent of this continuation-in-part · filed 15 Sep 1987
Serial273,923Parent of this continuation · filed 18 Nov 1988
US 5,030,276 AParent of this continuation
US 5,116,568 AThis patent

From the US filing history. Foreign family members aren’t listed.