Diamond Innovations. Inc.

Momentive Performance Materials Gmbh

Ramamoorthy Ramasamy

Thomas R Dugan

Gregory Shaffer

Paulo Meneghetti

Mark Schweizer

A method of treating a polycrystalline diamond (PCD) compact including a substrate and a layer of diamond material mixture of diamond particles and binder-catalyst disposed on the substrate. A leaching agent is applied to at least the layer of diamond material of the PCD compact. The leaching agent and a surface of the layer of diamond material are heated to a first temperature. The substrate is cooled to a second temperature. A first temperature gradient is established within the PCD compact to cause an inward diffusion of the leaching agent into at least the layer of diamond material. The cooling of the substrate is stopped and energy is applied directly to the PCD compact to heat the same to a third temperature. A second temperature gradient is established within the PCD compact to cause an outward diffusion of the binder-catalyst to remove the same from the layer of diamond material. The first and second temperature gradients can be repeated to accelerate removal of the reacted binder-catalyst from at least the layer of diamond material.

Induction heating aided leaching of polycrystalline diamond compacts and a process thereof

A method for making a polycrystalline diamond compact including the step of providing a polycrystalline diamond compact. The compact has a substrate of a hard metal composition of material and a volume of diamond material disposed on the substrate. The diamond material includes a mixture of diamond particles and a binder-catalyst. At least one pre-coating layer of organic material impermeable to a given acid or mixture of given acids is applied to at least an exterior surface of the substrate. At least one layer of primer material that is impermeable to a given acid or mixture of given acids is applied on the at least one pre-coating layer. A layer of top coating material that is impermeable to the given acid or mixture of given acids is applied to the at least one primer layer. When the given acid or mixture of given acids is applied to the compact to leach the binder-catalyst from the diamond material the at least one pre-coating layer, at least one primer layer and layer of top coating material protect the coated portions of the compact.

Multilayer coating process protecting the substrate of thermally stable polycrystalline diamond cutter

A thermal interface material is constructed from a base matrix comprising a polymer and 5 to 90 wt. % of boron nitride filler having a platelet structure, wherein the platelet structure of the boron nitride particles are substantially aligned for the thermal interface material to have a bulk thermal conductivity of at least 1 W/mK.

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Westerville, OH, United States of America

Ramamoorthy Ramasamy