摘要
本文研究了炸药爆轰合成的纳米金刚石粉的小颗粒在高温 (～ 10 0 0K)和高压(5 2GPa)条件下的长大行为。将纳米金刚石粉放入特制的模具中压制成小圆片 ,将纳米金刚石小园片相互叠加起来放入钼套中 ,压实。然后将钼套置于石墨套中再放到叶蜡石块中 ,于高温高压下进行长大实验。实验结果表明 :在此高温高压条件下 ,纳米金刚石粉没有石墨化 ;纳米金刚石粉的纳米颗粒长大 ,可长成 1微米尺寸的金刚石颗粒 (温度为 10 0 0K左右 )。这一现象表明 。
Under high temperature(～1000K) and high pressure (5\^2GPa),the growing behaviour of nanometric\|diamond particles(2～10nm) synthesized by the detonation of the explosives has been investigated. Firstly,the powders of nanometric deamond have been compressed into smaller circle plates with the special model.The experimental assembly for nanometric\|Diamond growing consists of the plates of nanometric\|diamond(inner), the Molybdenum capsule(middle)and graphite heater(outer).Then, the assembly is put into the pyrophyllite sleeve to make test. The results indicate that the nanometric diamond powders do not graphitizate under high temperature (1070K) and high pressure (5\^2GPa), and begin to grow. Diamond particles with the diameter of 1μm can be observed under SEM. This phenomenon shows that the nanomtric diamond particles can grow into larger diamond particles under lower temperature because of the surface activity of nanometric particles.
出处
《材料科学与工程》
CAS
CSCD
北大核心
2001年第2期19-21,共3页
Materials Science and Engineering
关键词
纳米金刚石
生长
炸药爆轰合成
纳米颗粒
nanometric\|diamond powder
hith temperature and high pressure
growth
