非静水压下不同强度材料的应力传递特性  

Stress Transmission of Materials with Different Strengths under Non-Hydrostatic Compression

作　　者：冉翔天[1] 贺端威[1,2] 刘景[3] 王齐明[1] 王培[1] 王江华[1] 陈海花[1] 彭放[1] 

机构地区：[1]四川大学原子与分子物理研究所,四川成都610065 [2]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室,四川绵阳621900 [3]中国科学院高能物理研究所,北京100049

出　　处：《高压物理学报》2013年第2期205-210,共6页Chinese Journal of High Pressure Physics

基　　金：国家973项目(2011CB808200);国家自然科学基金(11027405),国家自然科学基金委员会-中国工程物理研究院NSAF联合基金(10976018)

摘　　要：运用金刚石压砧(DAC)同步辐射角散X射线衍射技术,对非静水压缩下不同强度材料的应力传递特性进行了高压原位研究。分别将Pt与β-SiC、Pt与WC以及WC与β-SiC压至56、61和25GPa,实验发现,由于两种不同材料的屈服强度存在差异,其晶粒边界的应力传递是不连续的,同时观测到两种材料之间的应力差随强度差的增加而增加。在DAC轴向X射线衍射实验中,相同加载下,从接近最小应力的方向观测到,强度大的材料其应力较小。Using diamond anvil cell （DAC） combined with synchrotron axial X-ray diffraction （AXRD） techniques, the stress transmission behavior among materials with different strengths was investigated under non-hydrostatic compression. In our experiments, powder mixtures of platinum （Pt） and cubic silicon carbide （β-SiC）,Pt and tungsten carbide （WC）,as well as WC and β-SiC, were compressed up to 56,61 ,and 25 GPa,respectively. We found that the stress transmission among the grain boundary of two different materials is discontinuous due to their strength difference, and the observed stress differ- ence increases with the strength difference. The stronger material has a smaller observed stress near the minimum stress direction under non-hydrostatic compression in DAC at the same loading.

关 键 词：应力传递 强度 非静水压 

分 类 号：O521.2[理学—高压高温物理]