标题：TEM and DSC studies on the synthetic diamond grown from Fe-Ni-C-B system under HPHT
作者：Gong, Jianhong; Lin, Shuxia; Gao, Jun
作者机构：[Gong, Jianhong; Lin, Shuxia; Gao, Jun] Shandong Univ, Sch Mech Elect & Informat Engn, Weihai 264209, Peoples R China.
会议名称：International Conference on Key Engineering Materials and Computer Science (KEMCS 2011)
会议日期：AUG 06-07, 2011
来源：KEY ENGINEERING MATERIALS AND COMPUTER SCIENCE
关键词：Synthetic diamond; thermal stability; boron; DSC
摘要：Transmission Electron Microscope (TEM) and Different scanning calorimetry (DSC) methods were used to investigate the diamonds grown with different boron content alloy catalysts under high-pressure high-temperature (HPHT). Experimental results demonstrated the microstructure and composition of boride compounds in synthetic diamond, such as (FeNi)(23)(CB)(6),(Fe, Ni)(3)(C,B), (Fe,Ni)B and B4C, whose formation process was analyzed. The thermal stability of diamond depends on boron concentration in catalyst according to DSC studies. We analyzed the reason of diamond oxidation. The work offers valuable information for improving the thermal stability of synthetic diamond crystals by adjusting boron content in the Fe-Ni based catalyst.