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高长径比柱状金刚石的高温高压合成与机理研究
  • ISSN号：1000-3290
  • 期刊名称：《物理学报》
  • 时间：0
  • 分类：TQ164[化学工程—高温制品工业]
  • 作者机构：[1]吉林大学超硬材料国家重点实验室,长春130012, [2]内蒙古民族大学物理学院,通辽028000
  • 相关基金：国家自然科学基金（批准号：50572032,50731006,50801030）; 内蒙古自然科学基金（批准号：2010MS0105）资助的课题~~
作者： 胡美华[1], 马红安[1], 颜丙敏[1], 张壮飞[1], 李勇[1], 周振翔[1], 秦杰明[2], 贾晓鹏[1]
关键词： 柱状金刚石, 长径比, 偏析, strip-shape diamond crystal, the length-diameter ratio, segregation
中文摘要：

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0.8—1.0 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.

英文摘要：

To extend the kind of diamond and solve the low life of diamond tools because of the insufficiency of holding force,the stripshape diamond with more than 2.5 in length-diameter ratio and 0.8—1.0 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.

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Dependence of nitrogen concentration in type Ib diamonds on synthesis temperature
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Synthesis of high quality type-Ib diamond crystals in carats grade
Effects of Ti additive on HPHT diamond synthesis in Fe-Ni-C system
Doping effect on thermoelectric properties of nonstoichiometric AgSbTe_2 compounds
Thermoelectric properties of quaternary Mg2Sn0.4Si0.6-xGex alloys
Phase transition and high temperature thermoelectric properties of copper selenide Cu2-xSe （0 ≤ x ≤ 0.25）
制备工艺对N型Bi2Te（2.4）Se（0.6）合金热电性能的影响
Effects of a carbon convection field on large diamond growth under high-pressure high-temperature conditions
Influence of annealing treatment on as-grown Ib-type diamond crystal at a high temperature and high pressure
金刚石烧结体残余应力的Raman表征
期刊信息
  • 《物理学报》
  • 北大核心期刊（2011版）
  • 主管单位:中国科学院
  • 主办单位:中国物理学会 中国科学院物理研究所
  • 主编：欧阳钟灿
  • 地址：北京603信箱(中国科学院物理研究所)
  • 邮编：100190
  • 邮箱：apsoffice@iphy.ac.cn
  • 电话：010-82649026
  • 国际标准刊号：ISSN：1000-3290
  • 国内统一刊号：ISSN：11-1958/O4
  • 邮发代号:2-425
  • 获奖情况:
  • 1999年首届国家期刊奖,2000年中科院优秀期刊特等奖,2001年科技期刊最高方阵队双高期刊居中国期刊第12位
  • 国内外数据库收录:
  • 美国化学文摘（网络版）,荷兰文摘与引文数据库,美国工程索引,美国科学引文索引（扩展库）,英国科学文摘数据库,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）,中国北大核心期刊（2000版）
  • 被引量:49876