Synthesis and growth mechanism of diamond and cubic boron nitride

金刚石和立方氮化硼的合成及生长机理

• 批准号: 06403016
• 负责人: FUKUNAGA Osamu
• 金额: $ 18.88万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06403016/
• 关键词: diamond cubic; boron nitride; high pressure synthesis; solvent growth; nitrogen in diamond; nitrogen getting elements; recrystalization; threshold pressure; 立方晶BN; 成長機構; 成長溶媒; 単結晶; 高純度化; 窒素の定量; 再結晶化法; ダイヤモンド単結晶; cBN単結晶; 結晶成長機構; 溶媒中での電子状態

On the formation and growth mechanism of diamond and cubic BN carried out in the present study will be summarized.In the present study, we used metal alloy solvents such as Ni, Ni-Ti, Ni-Nb, Fe-B,Fe-Co and Fe-Co-Ti used for diamond synthesis and growth experiments. Alkali and alkaline earth boron nitride compound such as CaLiBN2 was used as solvent for cBN growth.Nitrogen, which is a major impurity in diamond, can be eliminated by the addition of getter element such as Ti, Zr and Nb. However, few studies have been reported on the mechanism of the nitrogen gettering. Content of nitrogen in the diamond crystals decreased greatly by adding higher Ti content or growth at higher temperature. The content of nitrogen decreased remarkably when we use Fe-Co Ti alloy as solvent.We developed growth method of high pure diamond utilized recrystallization process of diamond on the seed crystal.Crystal structure analysis of CaLiBN_2 which used as solvent of cBN growth suggested that Li and N defect are present in the structure and these defects plays possible role of decreasing threshold pressure of the cBN formation.

在本研究中，我们采用Ni、Ni-Ti、Ni-Nb、Fe-B、Fe-Co和Fe-Co-Ti等金属合金溶剂进行金刚石的合成和生长实验。采用CaLiBN 2等碱金属和碱土金属氮化硼化合物作为生长cBN的溶剂，通过添加Ti、Zr和Nb等吸气剂，可以去除金刚石中的主要杂质氮。然而，关于氮吸气机理的研究却很少报道。添加较高的Ti含量或在较高的温度下生长，金刚石晶体中的氮含量大大降低。用Fe-Co Ti合金作溶剂，氮含量显著降低，利用金刚石在籽晶上的再结晶过程，发展了高纯金刚石的生长方法，用CaLiBN_2作溶剂生长cBN的晶体结构分析表明，结构中存在Li和N缺陷，这些缺陷可能起到降低cBN形成阈值压力的作用。

项目成果

N.Ohashi et.al: "The Electronic States of Nickel ions in Diamond Calculated by a Discrete-Variational X α Method" J.Appl.Phys. 36. 1126-1131 (1996)

N.Ohashi 等人：“通过离散变分 X α 方法计算的金刚石中镍离子的电子态”J.Appl.Phys. 36. 1126-1131 (1996)

T.Sugano, N.Ohashi, T.Tsurumi O.Fukunaga: "Nucleation and growth of diamond in Fe-Co solvent at high pressure and high temperature" High Pressure Sci.and Tech.edited by W.A.Trzeciakowski, World Sci. Pub., Singapore. 228-230 (1996)

T.Sugano、N.Ohashi、T.Tsurumi O.Fukunaga：“高压高温下 Fe-Co 溶剂中金刚石的成核和生长”高压科学与技术，W.A.Trzeciakowski 编辑，世界科学。

T. Sugano, N. Ohashi, T. Tsurumi and O. Fukunaga: "Pressure and temperature region of diamond formation in systems graphite and Fe containing alloy" Diamond and Related Materials. 5. 29-33 (1996)

T. Sugano、N. Ohashi、T. Tsurumi 和 O. Fukunaga：“石墨和含铁合金系统中金刚石形成的压力和温度区域”金刚石和相关材料。

N.Ohashi et.al: "Electronic State of Dopants in Diamond Calculated by a DV-Xa Method" Transactions of Materials Research Soc.Jpn.20. 906-909 (1996)

N.Ohashi 等人：“通过 DV-Xa 方法计算的金刚石中掺杂剂的电子状态”Transactions of Materials Research Soc.Jpn.20。

M.Iizuka, H.Ikawa and O.Fukunaga: "Nucleationand growth of diamond using Ni-Ti, Ni-Nb and Fe-B alloy as solvents" Diamond and Related Materials. 5. 38-42 (1996)

M.Iizuka、H.Ikawa 和 O.Fukunaga：“使用 Ni-Ti、Ni-Nb 和 Fe-B 合金作为溶剂的金刚石的成核和生长”《金刚石和相关材料》。