Preparation of Cubic Boron Nitride/Diamondo Nanocomposite from CVD Materials by Very High Pressure Treatment

CVD材料超高压制备立方氮化硼/金刚石纳米复合材料

• 批准号: 01470068
• 负责人: HIRAI Toshioo
• 金额: $ 3.58万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-01470068/
• 关键词: Cubic boron nitride; Diamond; Very high pressure treatment; Composite; CVD; Nanocomposite; Dielectric property; Substitute solide solution; 置換固溶

The cubic, zincbiende from of boron nitride (cBN) is a very intriguing material with a high hardness, thermal conductivity, as well as refractivity, all next ot diamond. This work aimed at developing a cBNーdiamond composite by combination of CVD/high pressure techniques.Two CVD^. d samples, BN (97) - C (3) and BN (20) - C (80), were subjested to high pressures to 10 GPa and high temperatures to 1700^ﾟC. From BN (97) - C (3), cBN appeared above 6 GPa and 1600^ﾟC or above 8 GPa and 1400^ﾟC. No diamond was formed at any conditions studied. From BN (20) - (80), a coexistence of cBN and diamond was observed at 10 GPa and 1600^ﾟC. Lowering of pressure at this same temperature. 1600^ﾟC, resulted in disappearance of diamond. Elevation of temperature to 1700^ﾟC at 8 GPa could however render sample partly convert into diamond.In reference to the existing phase relations of boron nitride and carbon, the present study has clarified two important points : First, diamond can be formed at 8 GPa which is unexpectedly low for noncatalytic condition. Second, the temperature required for cBN formation exhibits upward shift with incorporation of carbon.

立方氮化硼（cBN）是一种非常有趣的材料，具有高硬度、高导热性和高活性，仅次于金刚石。本工作旨在通过CVD/高压技术相结合的方法制备cBN金刚石复合材料。对BN（97）- C（3）和BN（20）- C（80）样品进行了高压至10 GPa和高温至1700 ℃的实验。从BN（97）- C（3）中，cBN出现在高于6 GPa和1600 μ C或高于8 GPa和1400 μ C。在所研究的任何条件下都没有形成金刚石。从BN（20）-（80），在10 GPa和1600 μ C下观察到cBN和金刚石的共存。在相同温度下降低压力。1600摄氏度，导致钻石消失。在8 GPa下升温至1700 ℃时，样品部分转变为金刚石，结合氮化硼和碳的相关系，本研究阐明了两个重要的观点：第一，在8 GPa下可以形成金刚石，这对于非催化条件来说是出乎意料的低。其次，随着碳的加入，cBN形成所需的温度出现上移。

项目成果

A.Onodera,N.Takahashi.H.Yoshihara,H.Nakae,Y.Matsunami,andT.Hirai: ""Formation of novel sinterd composites by highーpressure crystallization of amorphous ceramics"" Journal of Materials Science. vol.25. 4157-4161 (1990)

A. Onodera、N. Takahashi、H. Yoshihara、H. Nakae、Y. Matsunami 和 T. Hirai：“通过非晶陶瓷高压结晶形成新型烧结复合材料”《材料科学杂志》第 4157 卷。 4161 (1990)

K. Hiraga, T. Oku, M. Hirabayashi, T. Mastuda and T. Hirai: "Fivefold Multiply-Twinned Precipitates in Chemically VapourーDeposited Boron Nitride Studied by Transmission Electron Micriscopy" Journal of Materials Science Letter. 8. 130-134 (1989)

K. Hiraga、T. Oku、M. Hirabayashi、T. Mastuda 和 T. Hirai：“通过透射电子显微镜研究化学气相沉积氮化硼中的五倍多重孪晶沉淀”《材料科学快报》杂志 8. 130-134。 (1989)

A. Onodera, N. Takahashi, H. Yoshihara, H. Nakae, Y. Matsunami and T. Hirai: "Formation of Nevel Sintered Composites High-Pressure Crystallization of Amorphous Ceramics" Journal of Mateials Science. 25. 4157-4161 (1990)

A. Onodera、N. Takahashi、H. Yoshihara、H. Nakae、Y. Matsunami 和 T. Hirai：“非晶陶瓷高压结晶 Nevel 烧结复合材料的形成”《材料科学》杂志。

A.Onodera,K.Inoue,H.Yoshihara,H.Nakae,T.Matsuda,and T.Hirai: ""Synthesis of cubic born nitride from rhombohedral form under hydrostatic pressure"" Journal of Materials Science. vol.25. 4279-4284 (1990)

A.Onodera、K.Inoue、H.Yoshihara、H.Nakae、T.Matsuda 和 T.Hirai：““在静水压力下从菱形六面体形式合成立方氮化物””材料科学杂志。

H.Yoshihara,A.Onodera,K.Suito,H.Nakae,Y.Matsunami,and T.Hirai: ""Behaviour of BーNーSi under high pressure and high temperature"" Journal of Materials Science. vol.25. 4595-4603 (1990)

H. Yoshihara、A. Onodera、K. Suito、H. Nakae、Y. Matsunami 和 T. Hirai：“B-N-Si 在高压和高温下的行为”《材料科学杂志》第 25 卷 .4595。 -4603 (1990)