JP2016128378A - 窒化ホウ素多結晶体および工具 - Google Patents
窒化ホウ素多結晶体および工具 Download PDFInfo
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- JP2016128378A JP2016128378A JP2016015982A JP2016015982A JP2016128378A JP 2016128378 A JP2016128378 A JP 2016128378A JP 2016015982 A JP2016015982 A JP 2016015982A JP 2016015982 A JP2016015982 A JP 2016015982A JP 2016128378 A JP2016128378 A JP 2016128378A
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- Prior art keywords
- boron nitride
- wbn
- polycrystal
- nitride polycrystal
- value
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- 229910052582 BN Inorganic materials 0.000 title claims abstract description 133
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 title claims abstract description 132
- 239000013078 crystal Substances 0.000 claims abstract description 16
- 239000012535 impurity Substances 0.000 claims abstract description 14
- 229910052984 zinc sulfide Inorganic materials 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 abstract description 24
- 239000007858 starting material Substances 0.000 abstract description 21
- 238000002441 X-ray diffraction Methods 0.000 abstract description 5
- 238000005087 graphitization Methods 0.000 abstract description 5
- 239000002245 particle Substances 0.000 description 18
- 239000011230 binding agent Substances 0.000 description 15
- 238000005520 cutting process Methods 0.000 description 14
- 238000005245 sintering Methods 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 12
- 239000000843 powder Substances 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000010438 heat treatment Methods 0.000 description 10
- 239000000203 mixture Substances 0.000 description 7
- 239000003054 catalyst Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000002775 capsule Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000003870 refractory metal Substances 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 238000001878 scanning electron micrograph Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- -1 cBN Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000007542 hardness measurement Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
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- Cutting Tools, Boring Holders, And Turrets (AREA)
- Ceramic Products (AREA)
Abstract
【解決手段】ウルツ鉱型窒化ホウ素(wBN)を95体積%以上含み、残部がwBNとは結晶構造の異なる立方晶窒化ホウ素(cBN)と不可避不純物とで構成され、ヌープ硬度が40GPa以上、破壊靭性値K1cが8.0MPa・m1/2以上である窒化ホウ素多結晶体。出発原料として、X線回折法による黒鉛化指数(GI値)が3.5未満の六方晶窒化ホウ素(hBN)(S21)を、8GPa以上の圧力下で、1300〜2200℃未満の温度の条件の元、加熱・加圧して(S21)、当該条件を一定期間維持し(S22)、hBNをwBNに相転移させ、焼結する(S20)hBNの製造方法。
【選択図】図2
Description
残部がウルツ鉱型窒化ホウ素とは結晶構造の異なる他の窒化ホウ素と不可避不純物とで構成され、ヌープ硬度が40GPa以上であり、破壊靭性値K1cが8.0MPa・m1/2以上である。このように、本発明の窒化ホウ素多結晶体は、主としてウルツ鉱型窒化ホウ素により構成されており、高硬度で、かつ耐亀裂伝搬性を有することができる。
Claims (5)
- ウルツ鉱型窒化ホウ素を95体積%以上含み、
残部が前記ウルツ鉱型窒化ホウ素とは結晶構造の異なる他の窒化ホウ素と不可避不純物とで構成され、
ヌープ硬度が40GPa以上であり、
破壊靭性値K1cが8.0MPa・m1/2以上である、窒化ホウ素多結晶体。 - 前記他の窒化ホウ素は、立方晶窒化ホウ素である、請求項1に記載の窒化ホウ素多結晶体。
- 前記他の窒化ホウ素は、圧縮型六方晶窒化ホウ素である、請求項1に記載の窒化ホウ素多結晶体。
- 外形の最大幅が0.3mm以上である、請求項1〜3のいずれか1項に記載の窒化ホウ素多結晶体。
- 請求項1〜4のいずれか1項に記載の窒化ホウ素多結晶体を備える工具。
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JP2012232989A Division JP5880389B2 (ja) | 2012-10-22 | 2012-10-22 | 窒化ホウ素多結晶体の製造方法 |
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JP2016128378A true JP2016128378A (ja) | 2016-07-14 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2020158361A (ja) * | 2019-03-27 | 2020-10-01 | 京セラ株式会社 | 窒化硼素質焼結体、インサートおよび切削工具 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4913209A (ja) * | 1972-05-17 | 1974-02-05 | ||
JPS5049309A (ja) * | 1973-09-03 | 1975-05-02 | ||
JPS61100302A (ja) * | 1984-10-22 | 1986-05-19 | Hiroshi Eda | ウルツ鉱型窒化硼素焼結体切削工具刃先のランド形成方法 |
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2016
- 2016-01-29 JP JP2016015982A patent/JP6288117B2/ja active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4913209A (ja) * | 1972-05-17 | 1974-02-05 | ||
JPS5049309A (ja) * | 1973-09-03 | 1975-05-02 | ||
JPS61100302A (ja) * | 1984-10-22 | 1986-05-19 | Hiroshi Eda | ウルツ鉱型窒化硼素焼結体切削工具刃先のランド形成方法 |
Non-Patent Citations (1)
Title |
---|
D.CHICOT ET AL., JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, JPN6016040433, 2007, pages 1905 - 1911 * |
Cited By (2)
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JP2020158361A (ja) * | 2019-03-27 | 2020-10-01 | 京セラ株式会社 | 窒化硼素質焼結体、インサートおよび切削工具 |
JP7204558B2 (ja) | 2019-03-27 | 2023-01-16 | 京セラ株式会社 | 窒化硼素質焼結体、インサートおよび切削工具 |
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