Search International and National Patent Collections

1. (WO2018005406) BINDERLESS CBN SINTERING WITH CUBIC PRESS

Pub. No.:    WO/2018/005406    International Application No.:    PCT/US2017/039363
Publication Date: Fri Jan 05 00:59:59 CET 2018 International Filing Date: Wed Jun 28 01:59:59 CEST 2017
IPC: C04B 35/583
C04B 35/645
Applicants: SMITH INTERNATIONAL, INC.
Inventors: BAO, Yahua
Title: BINDERLESS CBN SINTERING WITH CUBIC PRESS
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.