Studying the effect of hydrogen on diamond growth by adding C10H10Fe under high pressures and high temperatures. Issue 1 (2nd January 2016)

• Record Type: Journal Article
• Authors: Fang, Chao; Jia, Xiaopeng; Sun, Shishuai; Yan, Bingmin; Li, Yadong; Chen, Ning; Li, Yong; Ma, Hong-an
• Is Part Of: High pressure research. Volume 36:Issue 1(2016)
• Page Start: 42
• Page End: 54
• Publication Date: 2016-01-02
• Subjects: diamond -- HPHT -- hydrogen-doped -- C10H10Fe; High pressure (Science) -- Periodicals; High pressure (Technology) -- Periodicals; 536.41
• DOI: 10.1080/08957959.2015.1129405
• Languages: English
• ISSNs: 0895-7959

Abstract

ABSTRACT: In this paper, hydrogen-doped industrial diamonds and gem diamonds were synthesized in the Fe–Ni–C system with C10 H10 Fe additive, high pressures and high temperatures range of 5.2–6.2 GPa and 1250–1460°C. Experimental results indicate similar effect of hydrogen on these two types of diamonds: with the increasing content of C10 H10 Fe added in diamond growth environment, temperature is a crucial factor that sensitively affects the hydrogen-doped diamond crystallization. The temperature region for high-quality diamond growth becomes higher and the morphology of diamond crystal changes from cube-octahedral to octahedral. The defects on the {100} surfaces of diamond are more than those on the {111} surfaces. Fourier transform infrared spectroscopy (FTIR) results indicate that the hydrogen atoms enter into the diamond crystal lattice from {100} faces more easily. Most interestingly, under low temperature, nitrogen atoms can also easily enter into the diamond crystal lattice from {100} faces cooperated with hydrogen atoms.