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2 450 855

(13)

(51)

IPC

B01J3/06(2006-01-01)

C04B35/5831(2006-01-01)

C30B28/00(2006-01-01)

(21) (22)

Application

2011116265/05, 2011-04-26

(24)

Start date

2011-04-26

(22)

Actual filing date

2011-04-26

(45)

Published

2012-05-20

(72)

Inventor

Polushin Nikolaj IvanovichEljutin Aleksandr VjacheslavovichLaptev Aleksandr IvanovichSorokin Mikhail Nikolaevich

(73)

Holder

Federal'Noe Gosudarstvennoe Obrazovatel'Noe Uchrezhdenie Vysshego Professional'Nogo Obrazovanija Issledovatel'Skij Tekhnologicheskij Universitet

METHOD OF PRODUCING POLYCRYSTALLINE CUBIC BORON NITRIDE WITH FINE-GRAIN STRUCTURE Russian patent published in 2012 - IPC B01J3/06 C04B35/5831 C30B28/00

Abstract RU 2450855 C1

FIELD: process engineering.

SUBSTANCE: invention relates to production of polycrystalline cubic nitride with fine-grain structure. Cubic boron nitride-based polycrystalline material is produced by applying high pressure and temperature to charge containing composite powder with grain size of 4-100 nm including hexagonal boron nitride and aluminium nitride at the ratio of (4-6):1. Composite powder is produced by CBC-technology from boron-aluminium-nitrogen-containing compounds. Process is conducted at 60-120 kbar and 1700-2400°C in the region of thermodynamic stability of cubic boron for 15-60 s.

EFFECT: higher wear resistance and edge stability in processing high-alloyed steel and refractory nickel alloys.

3 cl

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RU 2 450 855 C1

Authors

Polushin Nikolaj Ivanovich

Eljutin Aleksandr Vjacheslavovich

Laptev Aleksandr Ivanovich

Sorokin Mikhail Nikolaevich

Dates

2012-05-20—Published

2011-04-26—Filed