ChampionX has been granted a patent for a polycrystalline diamond compact (PDC) featuring a cemented carbide substrate with fine tungsten carbide grains and a PCD table. This design enhances wear, corrosion, and impact resistance, with specific grain sizes and a depletion zone to improve performance. GlobalData’s report on ChampionX gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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Polycrystalline diamond compact with enhanced wear and impact resistance
The granted patent US12054992B1 describes a polycrystalline diamond compact (PDC) that features a cemented carbide substrate and a polycrystalline diamond table. The substrate is composed of a cobalt-containing cementing constituent that binds together tungsten carbide grains, which have an average grain size of approximately 1.5 µm or less. Notably, the substrate includes an interfacial surface and a depletion zone extending inwardly from this surface to a depth of 30 µm to 60 µm. The depletion zone exhibits a Palmquist fracture toughness ranging from 6 MPa·m^0.5 to 9 MPa·m^0.5, and the substrate is specifically designed to exclude chromium. The polycrystalline diamond table is bonded to the substrate and consists of diamond grains with an average size of 40 µm or less, incorporating a metallic constituent in the interstitial regions at a concentration of 7.5 weight % or less.
Additional claims detail various characteristics of the PDC, including the potential for a single cemented carbide substrate, specific ranges for the average grain size of tungsten carbide grains, and the depth of the depletion zone. The substrate's mechanical properties are also highlighted, with a transverse rupture strength between 460 ksi and 550 ksi, a hardness of 89.5 HRa to 92 HRa, and corrosion resistance demonstrated through the presence of corrosion pits after acid immersion. The polycrystalline diamond table is characterized by coercivity values between 115 Oe and 250 Oe and a specific magnetic saturation of 15 G·cm^3/g or less. The patent outlines a comprehensive framework for the PDC's structural and functional attributes, emphasizing its potential applications in various industrial contexts.
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GlobalData’s Patent Analytics tracks patent filings and grants from official offices around the world. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
