公开(公告)号：ZA201505784B

公开(公告)日：2020-08-26

申请号：ZA201505784

申请日：2015-08-12

Applicant: SMITH INTERNATIONAL

Inventor： BAO YAHUA

公开(公告)号：ZA201803651B

公开(公告)日：2021-01-27

申请号：ZA201803651

申请日：2018-05-31

Applicant: SMITH INTERNATIONAL

Inventor： BAO YAHUA ,  FANG YI ,  ZHANG HAIBO ,  BELNAP JOHN DANIEL ,  ZHANG YOUHE

Abstract: A cutting element has an ultrahard layer on a substrate, the ultrahard layer having a non-planar working surface. The non-planar working surface is formed from a first region and a second region, where the first region encompasses at least a cutting edge or tip of the cutting element and has a differing composition than the second region.

公开(公告)号：IE20090812A1

公开(公告)日：2010-06-23

申请号：IE20090812

申请日：2009-10-20

Applicant: SMITH INTERNATIONAL

Inventor： GRIFFO ANTHONY ,  CARIVEAU PETER THOMAS ,  BAO YAHUA ,  DEMENNA GERALD ,  BELNAP J DANIEL

IPC: B01J3/06 ,  C04B41/80

Abstract: A method for making a thermally stable cutting element may include forming an acid mixture containing two different acid species by combining an acid sloution and at least one acid-forming compound is provided in solid form, and wherein the at least one acid-forming compund produces and acid that is different than the acid sloution; treating at least a portion of a sintered diamond body by placing the sintered diamond body in the acid mixture, wherein the sintered diamond body comprises; a matrix phase of bonded-together diamond grains; a plurality of interstitial regions dispersed within the matrix phase; and a metal material disposed within a plurality of the interstitial regions; wherein the treating removes the metal material from at least a portion of the plurality of interstitial regions; and removing the sintered diamond body from the acid moxture after perdetermined length of time, wherein at least a portion of the diamond body removed from the acid mixture is substantially free of the metal and is a thermally stable diamond body.

公开(公告)号：ZA201703848B

公开(公告)日：2019-11-27

申请号：ZA201703848

申请日：2017-06-05

Applicant: SMITH INTERNATIONAL

Inventor： BAO YAHUA ,  WANG FULONG ,  BELNAP J DANIEL ,  EYRE RONALD K ,  FANG YI

公开(公告)号：AU2012298802A1

公开(公告)日：2013-10-31

申请号：AU2012298802

申请日：2012-08-23

Applicant: SMITH INTERNATIONAL

Inventor： BAO YAHUA ,  HORMAN SCOTT L

IPC: B01J3/06 ,  B23B7/02 ,  B23B27/20 ,  B24D3/10 ,  C01B31/06 ,  C30B29/04 ,  E21B10/46 ,  E21B10/567 ,  E21B10/573

Abstract: Polycrystalline diamond compacts for cutting tools and rock drilling tools, and more particularly to very fine polycrystalline diamond compacts with a grain growth inhibitor layer and reduced abnormal grain growth. A method of fabricating such polycrystalline diamond material includes placing a powder layer of nano-sized grain growth inhibitor particles next to a mixture of diamond particles having an average particle size of about 1 micron or less and sintering at high pressure and high temperature to create a polycrystalline structure of sintered diamond grains. The sintered diamond grains have an average size of about 1 micron or less.

公开(公告)号：GB2485912A

公开(公告)日：2012-05-30

申请号：GB201120497

申请日：2011-11-29

Applicant: SMITH INTERNATIONAL

Inventor： BAO YAHUA ,  YAO XIAN ,  HORMAN SCOTT

IPC: C04B35/52 ,  C04B35/628

Abstract: A method of forming a polycrystalline diamond material with fine diamond grains and nano-sized particles of a grain growth inhibitor is disclosed which includes providing a mixture of diamond particles with an average particle size of about 1 micron or less, distributing a plurality of nano-sized titanium-containing particles with the diamond mixture by depositing a plurality of titanium oxide particles on surfaces of the diamond particles and converting the titanium oxide particles into titanium-containing grain growth inhibitor such as titanium nitride, titanium carbide or titanium carbonitride, and sintering the mixture of diamond particles and titanium-containing particles at high pressure and high temperature to create a polycrystalline structure of sintered diamond grains. Also disclosed is a method of fabricating a polycrystalline diamond by mixing nano-sized titanium containing particles with diamond particles and sintering the mixture to form a polycrystalline diamond structure.

公开(公告)号：ZA201808295B

公开(公告)日：2021-10-27

申请号：ZA201808295

申请日：2018-12-07

Applicant: SMITH INTERNATIONAL

Inventor： BAO YAHUA

Abstract: A method of sintering a binderless cBN body includes providing a boron nitride particle mixture into a pressure chamber, the boron nitride particle mixture having a first type of boron nitride particles and boron nitride filler particles, and the boron nitride filler particles having a different size and/or type than the first type of boron nitride particles, and sintering the boron nitride particle mixture in the pressure chamber to form the cBN body by generating a pressure in the pressure chamber of less than 7.7 GPa and heating the boron nitride particle mixture to a temperature ranging from about 1900° C. to about 2300° C., wherein the cBN body has a density of at least 97 percent.

公开(公告)号：ZA201903905B

公开(公告)日：2021-01-27

申请号：ZA201903905

申请日：2019-06-14

Applicant: SMITH INTERNATIONAL

Inventor： BAO YAHUA ,  GARAN ANATOLIY ,  FRANCE MICHAEL DAVID ,  BELNAP J DANIEL

Abstract: A method of forming a polycrystalline diamond body includes mixing a sintering agent with diamond powder to form a premixed layer, the sintering agent including at least one alkaline earth metal carbonate; forming an infiltration layer adjacent to the premixed layer, the infiltration layer including an infiltrant material including at least one alkaline earth metal carbonate; and subjecting the premixed layer and the infiltration layer to high pressure high temperature conditions.

公开(公告)号：GB2523679A

公开(公告)日：2015-09-02

申请号：GB201508406

申请日：2013-11-15

Applicant: SMITH INTERNATIONAL

Inventor： BAO YAHUA ,  GARAN ANATOLIY ,  FRANCE MICHAEL DAVID ,  BELNAP J DANIEL

IPC: E21B10/46 ,  B24D18/00

Abstract: A method of making a polycrystalline diamond compact includes forming multiple layers of premixed diamond particles and carbonate material, wherein the carbonate material is selected from an alkaline earth metal carbonate, and wherein each layer has a weight percent ratio of diamond to carbonate that is different between adjacent layers. The layers are subjected to high pressure high temperature conditions to form polycrystalline diamond.

公开(公告)号：GB2522155A

公开(公告)日：2015-07-15

申请号：GB201508404

申请日：2013-11-15

Applicant: SMITH INTERNATIONAL

Inventor： BAO YAHUA ,  GARAN ANATOLIY ,  FRANCE MICHAEL DAVID ,  BELNAP DANIEL J

IPC: C22C26/00 ,  E21B10/567

Abstract: A method of forming a polycrystalline diamond body includes mixing a sintering agent with diamond powder to form a premixed layer, wherein the sintering agent has at least one of an alkaline earth metal carbonate, forming an infiltration layer adjacent to the premixed layer, wherein the infiltration layer has an infiltrant material selected from at least one of an alkaline earth metal carbonate, and subjecting the premixed layer and the infiltration layer to high pressure high temperature conditions.