POLYCRYSTALLINE CUBIC BORON NITRIDE AND PRODUCTION METHOD THEREFOR

The polycrystalline cubic boron nitride contains 98.5% by volume or more cubic boron nitride. When a cross section of the polycrystalline cubic boron nitride is observed at a magnification of 10,000 times by using a scanning electron microscope, the area ratio S1 of crystal particles having an equiv...

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Bibliographic Details
Main Authors HIRANO TSUTOMU, KUKINO SATORU
Format Patent
LanguageChinese
English
Published 05.02.2021
Subjects
ARTIFICIAL STONE
BORING
CEMENTS
CERAMICS
CHEMISTRY
COMBINED OPERATIONS
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
COMPOUNDS THEREOF
CONCRETE
INORGANIC CHEMISTRY
LIME, MAGNESIA
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
METALLURGY
NON-METALLIC ELEMENTS
OTHER WORKING OF METAL
PERFORMING OPERATIONS
REFRACTORIES
SLAG
TRANSPORTING
TREATMENT OF NATURAL STONE
TURNING
UNIVERSAL MACHINE TOOLS
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Summary:The polycrystalline cubic boron nitride contains 98.5% by volume or more cubic boron nitride. When a cross section of the polycrystalline cubic boron nitride is observed at a magnification of 10,000 times by using a scanning electron microscope, the area ratio S1 of crystal particles having an equivalent circle diameter of 1 micrometre or greater is 20% by area or less. 该多晶立方氮化硼包含98.5体积％以上立方氮化硼。当使用扫描电子显微镜以10,000倍的放大倍率观察多晶立方氮化硼的截面时，圆当量直径为1μm以上的晶粒的面积比率S1为20面积％以下。
Bibliography:Application Number: CN201980040476