高温高压下金刚石单晶生长过程的声发射动态特征  

Acoustic Emission Dynamic Characteristics of Growth Processof Diamond Single Crystals under HPHT

作　　者：刘磊[1,2] 张元培[1,2] 王风 陈冲 李木森[1,2] 

机构地区：[1]山东大学材料液固结构演变与加工教育部重点实验室,山东济南250061 [2]山东省超硬材料工程技术研究中心,山东邹城273500

出　　处：《高压物理学报》2010年第6期409-414,共6页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(50772060);山东省自然科学基金(Y2007F12);山东大学研究生自主创新基金(yzc09037)

摘　　要：采用声发射技术对高温高压下人造金刚石单晶的生长过程进行了动态检测。结合合成压块的断口形貌,对金刚石单晶生长过程对应的主要声发射参数进行了分析。结果表明,声发射信号的能量计数、振铃计数、幅度和上升时间等特征参数能客观反映金刚石单晶在高温高压下的动态生长规律,为研究金刚石单晶的生长机制提供了重要的实验依据。The growth process of synthetic diamond single crystals under high-pressure and high-temperature（HPHT） was tested with acoustic emission technique.Associated with the fracture morphologies of the synthetic mass,the main acoustic emission dynamic parameters corresponding to growth process of diamond single crystals were analyzed.The results indicate that the energy,count,amplitude and rise time of recorded acoustic emission signals can be objective reflection of the dynamic growth process of diamond single crystals under HPHT.The research provides the important experimental basis for studying the in-situ reaction mechanics of synthetic diamond single crystals under HPHT by using acoustic emission testing.

关 键 词：声发射检测技术 金刚石单晶 高温高压 特征参数 

分 类 号：O521.2[理学—高压高温物理] TQ164[理学—物理]