摘要
利用高能炸药爆轰产物驱动金属飞片,碰撞“硬”回收包套以输入平面冲击波,在24—37GPa的压力范围内,对纯石墨进行一至四次的冲击压缩实验,合成出了纯度很高、形貌良好的立方型聚晶金刚石,随着冲击次数的增加,金刚石的转化率和粒度有增大的趋势。但是,当金刚石粒度较大时(约100μm以上),如果冲击温度较低(约1000K以下)。同时冲击压力又较高(约20GPa以上),金刚石颗粒就容易被冲击波破碎。
Pure graphite powders were subjected to single to fourfold shock-compressions by use of an explosively driven metal flyer impacting onto the recovery capsule,and polycrystal cubic diamond of high purity and with regular morphology was synthesized from the graphite under pressures from 24 to 37GPa. Convertion ratio from graphite and particle size of diamond displayed an increased trend with the compression times. When the particle size of diamond is greater than about 100μm, however, it is easily to be fractured if the shock pressure is high (over 20GPa) while the temperature is low (below 1000K).
出处
《高压物理学报》
CAS
CSCD
北大核心
1992年第2期127-135,共9页
Chinese Journal of High Pressure Physics
关键词
冲击波
金刚石
合成
石墨
shock wave,diamond synthesis,high-pressure.
