In an embodiment, a method of fabricating a leached polycrystalline diamond (PCD) body is disclosed. The PCD body includes bonded diamond grains defining interstitial regions at least a portion of which include at least one interstitial constituent disposed therein. The method includes leaching the PCD body with a leaching agent to remove at least a portion of the at least one interstitial constituent therefrom. The leaching agent includes a mixture having hydrofluoric acid in a first concentration of about 10 weight % to about 50 weight %, nitric acid in a second concentration of about 5 weight % to about 25 weight %, and water in a third concentration of about 25 weight % to about 85 weight %. Further embodiments relate to different leaching methods and different leaching agent compositions.

The present disclosure includes a method of forming a polished surface. Forming the polished surface can include grinding an initial ceramic substrate to form a ground ceramic substrate; infiltrating the ground ceramic substrate with silicon; and polishing the silicon-infiltrated ceramic substrate, thereby forming the polished surface.

The invention relates to an abrasive support, to an abrasive article comprising such a support, to the method for producing the same, and to the use of the abrasive article. According to at least one embodiment, the abrasive support comprises an impregnated support material based on synthetic fibers. The impregnated support material has at least on one side having a surface roughness R.sub.z of 100 m to 500 m, and having an R.sub.max of 250 m to 600 m. The support has an air permeability of at most 20 l/m.sup.2 s.

A lapping material having a knitted fabric constituted by warp knitting or weft knitting, and a resin with which the knitted fabric is impregnated.

The present invention relates to a polishing pad comprising a base sheet containing a restriction layer. The invention also relates to a polishing apparatus and a method for manufacturing a polishing pad.

The present invention relates to a polishing pad and a method for making the same. The polishing pad includes a base layer and a polishing layer. The base layer has a first surface and a second surface. The polishing layer is disposed on the first surface of the base layer and has a plurality of second fibers, a polymeric elastomer and a plurality of pores. The second fibers are arranged irregularly and cross each other to form the pores, and the polymeric elastomer is attached to the second fibers and does not fill the pores.

Embodiments of the invention relate to polycrystalline diamond compacts (PDCs) and methods of fabricating polycrystalline diamond tables and PDCs in a manner that facilitates removal of metal-solvent catalyst used in the manufacture of polycrystalline diamond tables of such PDCs.

This invention relates to compressed composite backing materials (e.g., compressed polymer impregnated backing substrates) and coated abrasive articles that include such compressed composite backing materials. This invention also relates to methods of making and using said compressed composite backing materials and coated abrasive articles. The claimed processes and systems related to the use and manufacturing of coated abrasive articles are improved and cost effective.

A method for manufacturing a polishing head, includes: forming, on a lower end surface of an intermediate plate, a groove which extends from an inlet of an incompressible fluid to an outer peripheral portion of the intermediate plate and a groove which extends from an outlet of air to the outer peripheral portion of the intermediate plate, also including, after attaching an elastic film to a lower end surface of a rigid ring and coupling an upper end surface of the rigid ring with the lower end surface of the intermediate plate to form a space section: depressurizing the inside of the space section; and discharging the air in the space section from the outlet while pouring the incompressible fluid into the space section from the inlet after the depressurizing, and closing the inlet and outlet to seal the incompressible fluid in the space section.

Embodiments of the invention relate to polycrystalline diamond compacts (PDCs) and methods of fabricating polycrystalline diamond tables and PDCs in a manner that facilitates removal of metal-solvent catalyst used in the manufacture of polycrystalline diamond tables of such PDCs.