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CUBIC CRYSTAL BORON NITRIDE POLYCRYSTALLINE BODY, CUTTING TOOL, WEAR-RESISTANT TOOL, GRINDING TOOL, AND METHOD FOR PRODUCING CUBIC CRYSTAL BORON NITRIDE POLYCRYSTALLINE BODY
PROBLEM TO BE SOLVED: To provide a tough cubic crystal boron nitride polycrystalline body with a small particle size.SOLUTION: The cubic crystal boron nitride polycrystalline body includes cubic crystal boron nitride, the cubic boron nitride has the average particle diameter of 150 nm or lower, and, in the measurement of Knoop hardness at a test load of 4.9 N at 23°C±5°C, a ratio between the diagonal line a in the longer one of the diagonal line and the length b in the shorter one of the diagonal line in Knoop impression, b/a reaches 0.085 or lower.
【課題】小さい粒径で、かつ強靭な立方晶窒化ホウ素多結晶体を提供することを目的とする。【解決手段】立方晶窒化ホウ素多結晶体は、立方晶窒化ホウ素を含み、該立方晶窒化ホウ素は、１５０ｎｍ以下の平均粒径を有し、２３℃?５℃における試験荷重４．９Ｎのヌープ硬度の測定において、ヌープ圧痕の対角線の長い方の対角線の長さａと短い方の対角線の長さｂとの比ｂ／ａが０．０８５以下となるものである。【選択図】図１
CUBIC CRYSTAL BORON NITRIDE POLYCRYSTALLINE BODY, CUTTING TOOL, WEAR-RESISTANT TOOL, GRINDING TOOL, AND METHOD FOR PRODUCING CUBIC CRYSTAL BORON NITRIDE POLYCRYSTALLINE BODY
PROBLEM TO BE SOLVED: To provide a tough cubic crystal boron nitride polycrystalline body with a small particle size.SOLUTION: The cubic crystal boron nitride polycrystalline body includes cubic crystal boron nitride, the cubic boron nitride has the average particle diameter of 150 nm or lower, and, in the measurement of Knoop hardness at a test load of 4.9 N at 23°C±5°C, a ratio between the diagonal line a in the longer one of the diagonal line and the length b in the shorter one of the diagonal line in Knoop impression, b/a reaches 0.085 or lower.
【課題】小さい粒径で、かつ強靭な立方晶窒化ホウ素多結晶体を提供することを目的とする。【解決手段】立方晶窒化ホウ素多結晶体は、立方晶窒化ホウ素を含み、該立方晶窒化ホウ素は、１５０ｎｍ以下の平均粒径を有し、２３℃?５℃における試験荷重４．９Ｎのヌープ硬度の測定において、ヌープ圧痕の対角線の長い方の対角線の長さａと短い方の対角線の長さｂとの比ｂ／ａが０．０８５以下となるものである。【選択図】図１
CUBIC CRYSTAL BORON NITRIDE POLYCRYSTALLINE BODY, CUTTING TOOL, WEAR-RESISTANT TOOL, GRINDING TOOL, AND METHOD FOR PRODUCING CUBIC CRYSTAL BORON NITRIDE POLYCRYSTALLINE BODY
立方晶窒化ホウ素多結晶体、切削工具、耐摩工具、研削工具、および立方晶窒化ホウ素多結晶体の製造方法
ISHIDA TAKESHI (author) / YAMAMOTO KAZUKO (author) / SUMIYA HITOSHI (author)
2015-11-19
Patent
Electronic Resource
Japanese
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