Diamond synthesis from a system of chromium-carbide and Ni70Mn25Co5 alloy |
| |
Authors: | Liangbin Li Jinchun Jiang Shiming Hong Yumao Zhong Xinyuan Zhang |
| |
Affiliation: | LI Liangbin 1, JIANG Jinchun 1, HONG Shiming 1, ZHONG Yumao 2 and ZHANG Xinyuan 2 1. Institute of Applied Physics, Sichuan Union University, Chengdu 610065, China; 2. Center for Analysis and Test, Sichuan Union University, Chengdu 610065, China |
| |
Abstract: | In order to ascertain the mechanism of interaction between carbide and metallic catalyst and formation of diamond under high pressure and high temperature, and find a new method to synthesize diamond with special properties, it is necessary to investigate the reaction behavior of different carbides and metallic solvent_catalysts under high pressure and high temperature. A system of Cr-3C-2 powder and Ni 70Mn 25Co 5 alloy in weight ratio of 1∶6 was treated under 6 0 GPa and 1 500℃ for 20, 30 or 60 min respectively. X_ray diffraction of the samples indicated the Cr 3C 2 decomposed partially after high pressure and temperature treatment, and Cr 7C 3, Cr and diamond formed respectively. There was not any trace of graphite in the samples. The result suggested that the separated carbon atoms could form diamond directly without conversion process of graphite into diamond. The observation of SEI, WDX and EDX also showed that diamond crystals were synthesized in the system, which have perfect surfaces and shapes, with the average grain size of about 40 μm. The properties of the crystals are being investigated. |
| |
Keywords: | chromium_carbide high pressure synthesis diamond. |
本文献已被 SpringerLink 等数据库收录! |
| 点击此处可从《科学通报(英文版)》浏览原始摘要信息 |
|
点击此处可从《科学通报(英文版)》下载全文 |
|