CAJ | 학술논문

针对静高压合成技术中片状样品的组装工艺特点，分析了在高温(约1500K)高压(约5GPa)下石墨与触媒之间的相互扩散过程和金刚石在合成腔中的成核几率。根据外界提供给石墨的能量大小，判断出纳米石墨微晶是形成金刚石晶核的基本单元。金刚石成核很可能是纳米石墨微晶转化为金刚石晶核的结构相变过程。讨论了在触媒的参与下金刚石的成核率与温度压力变化的关系，证明了压力是控制金刚石成核的有效参数，而温度不宜作为金刚石成核的控制参数。
침대정고압합성기술중편상양품적조장공예특점，분석료재고온(약1500K)고압(약5GPa)하석묵여촉매지간적상호확산과정화금강석재합성강중적성핵궤솔。근거외계제공급석묵적능량대소，판단출납미석묵미정시형성금강석정핵적기본단원。금강석성핵흔가능시납미석묵미정전화위금강석정핵적결구상변과정。토론료재촉매적삼여하금강석적성핵솔여온도압력변화적관계，증명료압력시공제금강석성핵적유효삼수，이온도불의작위금강석성핵적공제삼수。
In the light of the peculiarity of synthesis sample assembling mode using plate-shape graphite and catalyst al-loy under about 1500K temperature and 5GPa pressure, the diffusion process between graphite and alloy as well as dia-mond nucleation possibilities in synthesis chamber are ana-lyzed. It is judged that nano-crystalline graphite can be the basic unit of diamond nucleation in consideration of the en-ergy offered by out-side factors. It is likely that diamond nucleation is a phase transformation process from nano-graphite into nano-diamond. The variation of diamond nu-cleation ratio with temperature and pressure is discussed. It is indicated that pressure is an effective parameter to control diamond nucleation, while the temperature is not.