-
为了拓展金刚石的种类和解决金刚石工具使用过程中因把持力不足造成的使用寿命降低等, 在中国式六面顶压机上, 通过对FeNi触媒成分和工艺的优化, 成功合成出高质量长径比大于2.5, 平均粒度在0.81.0 mm的柱状金刚石晶体. 该晶体独特的形貌, 将极大改善金刚石工具的在使用过程中出现的脱粒现象. 另外, 实验中发现, 柱状金刚石晶体的生长速度也远大于传统晶体的生长速度. 采用扫描电镜(SEM)和能谱(EDS)等手段对柱状金刚石晶体及晶体周围触媒成分进行了表征; 结果表明, 柱状金刚石晶体在生长过程中存在{100}和{111}晶面拉长, 以及包覆在晶体周围的触媒成分偏析. 在此基础上, 阐明了柱状晶体生长机理.To extend the kind of diamond and solve the low life of diamond tools because of the insufficiency of holding force, the strip-shape diamond with more than 2.5 in length-diameter ratio and 0.81.0 mm in length is synthesized by optimizing FeNi based catalyst composition and using the technology in the China-type cubic anvil high pressure apparatus. Because of the unique morphology, the threshing phenomenon appearing in the using of diamond tools is controlled effectively. Furthermore, we find that the growth rate of strip-shape diamond is much faster than that of the conventional diamond. Strip-shape diamond morphology and catalyst composition around the growing diamond crystal are characterized by SEM and EDS. The results indicate that the facets of diamond crystal are elongated along {100} and {111} faces and catalyst compositions around the growing diamond crystal become segregated. On this basis, we illustrate the growth mechanism of strip-shape diamond.
-
Keywords:
- strip-shape diamond crystal /
- the length-diameter ratio /
- segregation
[1] Ekimov E A, Sidorov V A, Bauer E D, Mel'nik N N, Curro N J, Thompson J D, Stishov S M 2004 Nature 428 542
[2] Koizumi S,Watanabe K, Hasegawa M, Kanda H 2001 Science 292 1899
[3] Wang J T, Chen C F, Kawazoe Y 2011 Phys. Rev. B 84 012102
[4] Burns R C, Hansen J O, Spits R A, Sibanda M, Melbourn C M, Welch D L 1999 Diamond Relat. Mater. 8 1433
[5] Luo X G, Liu Z Y, Xu B, Yu D L, Tian Y J, Wang H T, He J L 2010 J. Phys. Chem. C 114 17851
[6] Kalish R, Reznik A, Uzan-Saguy C, Cytermann C 2000 Appl. Phys. Lett. 76 757
[7] Han Q G, Ma H A, Xiao H Y, Li R, Zhang C, Li Z C, Tian Y, Jia X P2010 Acta Phys. Sin. 59 1923 (in Chinese) [韩奇钢, 马红安, 肖宏宇, 李瑞, 张聪, 李战厂, 田宇, 贾晓鹏 2010 textbf 59 1923]
[8] Hong G F, Jia X P, Li S S, Zhang Y F, Li Y, Zhao M, Ma H A 2010 Chin. Phys. B 19 118101
[9] Bundy F P, Strong H T, Wentorf R H 1955 Nature 176 51
[10] Kanda H, Akaishi M,Yamaoka S 1994 Appl. Phys. Lett. 65 784
[11] Sung C, TaiM1995/1996 High Temperature -High Pressure 27/28 523
[12] Qin J M, Zhang Y, Cao J M, Tian L F 2011 Acta Phys. Sin. 60 058102 (in Chinese) [秦杰明, 张莹, 曹建明, 田立飞 2011 60 058102]
[13] Liu X B, Jia X P, Guo X K, Zhang Z F, Ma H A 2010 Cryst. Growth. Des. 10 2895
[14] Zhou L, Jia X P, Ma H A, Zheng Y J, Li Y T 2008 Chin. Phys. B 17 4665
[15] Lin I C, Lin C J, Tuan W H 2011 Diamond Relat. Mater. 20 42
[16] Webb S W 1999 Diamond Relat. Mater. 8 2043
[17] Ma H A, Jia X P, Chen L X, Zhu P W, Guo W L, Guo X B, Wang Y D, Li S Q, Zou G T, Bex P 2002 J. Phys: Condens. Matter. 14 11269
-
[1] Ekimov E A, Sidorov V A, Bauer E D, Mel'nik N N, Curro N J, Thompson J D, Stishov S M 2004 Nature 428 542
[2] Koizumi S,Watanabe K, Hasegawa M, Kanda H 2001 Science 292 1899
[3] Wang J T, Chen C F, Kawazoe Y 2011 Phys. Rev. B 84 012102
[4] Burns R C, Hansen J O, Spits R A, Sibanda M, Melbourn C M, Welch D L 1999 Diamond Relat. Mater. 8 1433
[5] Luo X G, Liu Z Y, Xu B, Yu D L, Tian Y J, Wang H T, He J L 2010 J. Phys. Chem. C 114 17851
[6] Kalish R, Reznik A, Uzan-Saguy C, Cytermann C 2000 Appl. Phys. Lett. 76 757
[7] Han Q G, Ma H A, Xiao H Y, Li R, Zhang C, Li Z C, Tian Y, Jia X P2010 Acta Phys. Sin. 59 1923 (in Chinese) [韩奇钢, 马红安, 肖宏宇, 李瑞, 张聪, 李战厂, 田宇, 贾晓鹏 2010 textbf 59 1923]
[8] Hong G F, Jia X P, Li S S, Zhang Y F, Li Y, Zhao M, Ma H A 2010 Chin. Phys. B 19 118101
[9] Bundy F P, Strong H T, Wentorf R H 1955 Nature 176 51
[10] Kanda H, Akaishi M,Yamaoka S 1994 Appl. Phys. Lett. 65 784
[11] Sung C, TaiM1995/1996 High Temperature -High Pressure 27/28 523
[12] Qin J M, Zhang Y, Cao J M, Tian L F 2011 Acta Phys. Sin. 60 058102 (in Chinese) [秦杰明, 张莹, 曹建明, 田立飞 2011 60 058102]
[13] Liu X B, Jia X P, Guo X K, Zhang Z F, Ma H A 2010 Cryst. Growth. Des. 10 2895
[14] Zhou L, Jia X P, Ma H A, Zheng Y J, Li Y T 2008 Chin. Phys. B 17 4665
[15] Lin I C, Lin C J, Tuan W H 2011 Diamond Relat. Mater. 20 42
[16] Webb S W 1999 Diamond Relat. Mater. 8 2043
[17] Ma H A, Jia X P, Chen L X, Zhu P W, Guo W L, Guo X B, Wang Y D, Li S Q, Zou G T, Bex P 2002 J. Phys: Condens. Matter. 14 11269
计量
- 文章访问数: 7775
- PDF下载量: 569
- 被引次数: 0