FeNi、NiMnCo及其复合触媒中Ⅰb型金刚石的生长特性  

Growth Characteristics of TypeⅠb Diamonds in FeNi,NiMnCo and Their Composite Catalysts

作　　者：王蒙召 许安涛[2] 李尚升[1] 高广进 胡美华[1] 宿太超[1] 黄国锋[3] 李战厂 周振翔[4] 聂媛 陈珈希 周绪彪 WANG Mengzhao;XU Antao;LI Shangsheng;GAO Guangjin;HU Meihua;SU Taichao;HUANG Guofeng;LI Zhanchang;ZHOU Zhenxiang;NIE Yuan;CHEN Jiaxi;ZHOU Xubiao(Henan Key Laboratory of Materials on Deep-Earth Engineering, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China;Jiaozuo Teachers College, Jiaozuo 454000, China;Inner Mongolia Key Laboratory of High-Pressure Phase Functional Materials, Chifeng University, Chifeng 024000, China;Beijing Sinoma Snythetic Crystals Co., Ltd., Beijing 100018, China)

机构地区：[1]河南理工大学材料科学与工程学院,河南省深地材料科学与技术重点实验室,焦作454003 [2]焦作师范高等专科学校,焦作454000 [3]赤峰学院,内蒙古自治区高压相功能材料重点实验室,赤峰024000 [4]北京中材人工晶体研究院有限公司,北京100018

出　　处：《人工晶体学报》2021年第11期2060-2066,共7页Journal of Synthetic Crystals

基　　金：国家自然科学基金(52072113);内蒙古自治区高压相功能材料重点实验室开放课题(cfxygy202003);河南省自然科学基金(182300410279);河南省科技攻关项目(182102210311);河南理工大学博士基金(B2017-54)。

摘　　要：本文以Ni_(70)Mn_(25)Co_(5)和Fe_(64)Ni_(36)合金及其复合合金作为触媒,采用高温高压温度梯度法在5.6 GPa压力下,对不同温度下沿(100)晶面生长的Ⅰb型金刚石的生长特性进行了研究,研究表明:以Fe_(64)Ni_(36)触媒合成出的金刚石在以(111)晶面为主的晶形高温生长范围内出现了一段约50 K范围的裂晶生长区,而以Ni_(70)Mn_(25)Co_(5)触媒合成的金刚石在生长温度范围内,特别是在以(111)晶面为主的晶体生长高温区域内容易出现连晶缺陷;高温下Fe_(64)Ni_(36)触媒过度熔融可能是晶体容易产生裂晶的原因,Ni_(70)Mn_(25)Co_(5)触媒熔体黏性较低可能是容易形成连晶的原因;采用两种触媒复合的方式有效避免了裂晶和连晶的产生;拉曼光谱表征发现连晶的晶体内部质量与单晶的晶体质量相近,裂晶中晶格畸变和杂质较多,晶体内应力较大,复合触媒体系合成的金刚石晶体内应力小,质量好。In this paper,Ni_(70)Mn_(25)Co_(5) and Fe_(64)Ni_(36) alloys and their composite alloys were used as catalysts to study the growth characteristics of typeⅠb diamonds grown along(100)crystal plane at different temperatures under 5.6 GPa pressure by high temperature and high pressure temperature gradient method.The results show that the diamond synthesized with Fe_(64)Ni_(36) catalyst has a cracking growth zone of about 50 K in the high temperature growth range of(111)crystal plane.The diamond synthesized with Ni_(70)Mn_(25)Co_(5) catalyst is prone to crystal stock defects in the growth range,especially in the high temperature crystal growth range of(111)crystal plane.The excessive melting of Fe_(64)Ni_(36) catalyst at high temperature may be the cause of crystal cracking,and the low viscosity of Ni_(70)Mn_(25)Co_(5)catalyst melt may be the reason for easy formation of crystal stock.The combination of two kinds of catalysts can effectively avoid the formation of cracking and crystal stock.Raman spectroscopic characterization shows that the internal quality of crystal stock is similar to that of single crystals.There are more lattice distortion and impurities in the cracky crystals and the stress in the crystal is larger.The diamond crystal synthesized by compound catalyst system has low internal stress and good quality.

关 键 词：Ⅰb型金刚石 高温高压合成 温度梯度法 触媒合金片 裂晶 连晶 

分 类 号：TQ163[化学工程—高温制品工业]