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Class 427/249.13 - Tungsten containing base


Subclass of Class 427 - Coating processes
Definition: Process wherein the base contains tungsten.
No. of patents: 17
Last issue date: 11/07/2006


NumberTitleIssue Date
7132309Semiconductor-on-diamond devices and methods of forming
The present invention provides semiconductor-on-diamond devices, and methods for the formation thereof. In one aspect, a mold is provided which has an interface surface configured to inversely match a configuration intended for the device surface of a diamond layer....
11/07/2006
7097685Cemented carbide, coated cemented carbide member and production processes of the same
A cemented carbide comprises a binder phase consisting essentially of an iron family metal, a first hard phase consisting essentially of WC having a hexagonal crystal structure, and a second hard phase consisting essentially of one or more types of a compound of a m...
08/29/2006
6969313Cast diamond tools and formation thereof by chemical vapor deposition
The present invention provides diamond tools, and a method for the formation thereof, using CVD techniques. In one aspect, an ephemeral mold is provided which has a diamond interface surface configured to inversely correspond to the desired shape for the working sur...
11/29/2005
6929851Coated substrate
Method for removing a portion of the binder phase from the surface of a substrate that is composed of particles of at least a first phase joined together by the binder phase, and wherein the surface is etched by contacting it with a gas flow of an etchant gas and a ...
08/16/2005
6723389Process for producing coated cemented carbide excellent in peel strength
A coated cemented carbide excellent in peel strength includes a cemented carbide substrate comprising a hard phase containing tungsten carbide and a binder phase, and a hard film being provided on a surface of the substrate with a single layer or two or more laminat...
04/20/2004
6660329Method for making diamond coated cutting tool
A process for making a diamond coated cutting tool that comprises the steps of providing a sintered substrate, re-sintering the sintered substrate to form a re-sintered substrate, subjecting the re-sintered substrate to a chemical treatment to remove coba...
12/09/2003
6517902Methods of treating preform elements
A method of thermally treating a preform element, of the kind having a facing table of polycrystalline diamond bonded to a substrate of cemented tungsten carbide, comprises the steps of: (a) heating the element to a soaking temperature of 550-625° C., an...
02/11/2003
6319439Method of synthesizing even diamond film without cracks
A method of synthesizing an even free-standing diamond film without growth cracks is disclosed. The intrinsic tensile stress of a diamond film is compensated by an artificial compressive stress with a step down control of the deposition temperature during...
11/20/2001
6096377Process for coating sintered metal carbide substrates with a diamond film
A method for coating a sintered metal carbide substrate with a diamond film is disclosed, which comprises subjecting the substrate to a selective tungsten carbide etching step; subjecting the substrate to a selective Co etching step; and subsequently coat...
08/01/2000
5902640Method of improving field emission characteristics of diamond thin films
A method of preparing diamond thin films with improved field emission properties. The method includes preparing a diamond thin film on a substrate, such as Mo, W, Si and Ni. An atmosphere of hydrogen (molecular or atomic) can be provided above the already...
05/11/1999
5718948Cemented carbide body for rock drilling mineral cutting and highway engineering
The invention relates to a coated cemented carbide body for rock drilling having a substrate containing at least one metal carbide and a binder metal and an at least partly covering coating comprising at least one diamond- or cBN-layer applied by CVD- or ...
02/17/1998
5660881Method of manufacturing CVD diamond coated cutting tools
This invention presents diamond coated tool member of high toughness exhibiting excellent diamond adhesion to the substrate. The green compacts of the usual Co and WC composition are subjected to primary sintering in a vacuum or in an inert gas atmosphere...
08/26/1997
5648119Process for making diamond coated tools and wear parts
A diamond-coated tool and a process for making them. The process includes a sintering step. In that step, a substrate is sintered in an atmosphere and for a time and at a temperature so that superficial, exaggerated grain growth is promoted that imparts a...
07/15/1997
5643523Method of manufacturing diamond-coated cutting tool inserts
A method of making a diamond-coated insert includes, obtaining a substrate of durable and diamond adherent material having a substantially smooth surface on which is coated a diamond layer using any known CVD technique, and partitioning the diamond covere...
07/01/1997
5135807Diamond-coated member and process for the preparation thereof
The present invention relates to a diamond-coated member characterized by superposing an acicular diamond layer, an intermediate layer formed by a metal belonging to either of the group IIIb, IVa, Va or VIa of the periodic table or by a compound containin...
08/04/1992
5100703Diamond-coated sintered body excellent in adhesion and process for preparing the same
There are disclosed a diamond-coated sintered body, comprising a film or diamond and/or diamond-like carbon deposited on the surface of a sintered body of a hard phase composed mainly of a mixture of W2 C and WC and inevitable impurities and a ...
03/31/1992
5028451Method of producing sintered hard metal with diamond film
The present invention is directed to a method of producing a sintered hard metal having a diamond film wherein a gas that is obtained by activating a raw material gas containing 2 to 60 mol % of carbon monoxide and hydrogen gas is brought in contact with ...
07/02/1991
 
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