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公开(公告)号：US20220152700A1
公开(公告)日：2022-05-19
申请号：US16653566
申请日：2019-10-15
Inventor： Abbas Saeed HAKEEM , Akeem Yusuf ADESINA , Muhammad Umar AZAM , Bilal Anjum AHMED , Ahmad A. SOROUR
Abstract: Bearing steel comprising cubic boron nitride (c-BN) and/or nickel coated cBN spark plasma sintered at a temperature in the range of 850-1050° C. is disclosed. The tribological and corrosion resistance of the bearing steel improved with increasing the amount of c-BN. Further improvement in the properties was achieved with the incorporation of nickel coated c-BN, which caused a phase transition of the bearing steel from magnetic to non-magnetic phase accompanied by interdiffusion enhancement between the matrix and c-BN reinforcement.
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公开(公告)号：US20250091960A1
公开(公告)日：2025-03-20
申请号：US18467936
申请日：2023-09-15
Inventor： Syed Sohail AKHTAR , Amer Duraywish ALOTAIBI , Abba Abdulhamid ABUBAKAR , Abbas Saeed HAKEEM , Khaled S. AL-ATHEL , Akeem Yusuf ADESINA
IPC: C04B35/597 , C04B35/64
Abstract: A functionally graded (FG) SiAlON composite cutting tool includes a cutting head having a cutting surface containing the FG SiAlON composite. The FG SiAlON composite is obtained by sintering one or more powder compositions containing SiO2 particles having a particle size of 20 to 50 nanometers (nm), AlN particles having a particle size of up to 100 nm, Si3N4 particles having a particle size of 300 to 500 nm, Al2O3 particles having a particle size of up to 100 nm, Yb2O3 particles having a particle size of up to 100 nm, and one or more reinforcement additives selected from the group consisting of cobalt (Co) particles, titanium carbonitride (TiCN) particles, cobalt alloy particles, and a boron nitride compound. The one or more reinforcement additives have an average particle size in a range of 50 nm to 35 micrometers (μm).
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