中文摘要：

采用粉末冶金方法制成铁基片状触媒,以及在铁基触媒中添加碳化硼粉,通过高温高压方法制得常规金刚石单晶和含硼金刚石单晶。根据测定的DTA实验数据,利用K iss inger和O zaw a动力学模型分别计算了两种金刚石单晶剧烈氧化时的表观活化能。结果表明,含硼金刚石单晶的表观活化能明显高于常规金刚石单晶,因而具有更高的热稳定性。而两种动力学模型的计算结果相近,证明计算的表观活化能数值基本可信。

英文摘要：

Diamond single crystals and boron-doped diamond single crystals were synthesized under high temperature and high pressure by using iron-based catalysts without and with boron carbide produced by powder metallurgy technique, respectively. On the basis of the DTA results, the apparent activation energy of two kinds of diamond single crystals in vigorous oxidation was calculated by Kissinger and Ozawa dynamic models. As a conclusion, the apparent activation energy of the boron-doped diamond single crystals is larger than that of the boron-undoped diamond so that the thermal stability of the former is much higher than the latter. And the reliable values of apparent activation energy can be obtained due to the calculations of the two models are proximity.