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通过测量过渡金属元素(Ti,V,Cu)以及TiAl基合金(Ti50Al50,Ti50Al48V2,Ti50Al48Cu2)的符合正电子湮没辐射多普勒展宽谱和寿命谱,获得了这些金属及合金中3d电子和缺陷的信息.结果表明,过渡金属元素Ti,V,Cu原子中3d轨道的电子数目越多,正电子湮没辐射Doppler展宽谱的3d信号越强.二元TiAl合金的电子密度和3d电子的信号较低,晶界缺陷的开空间较大.在TiAl合金中加入V或Cu,合金中的3d电子信号增强,基体和晶界处的电子密度均增加.Ti50Al48Cu2合金的多普勒展宽谱的3d电子信号高于Ti50Al48V2合金.
The 3D electrons and defects in these metals and alloys were obtained by measuring the Doppler broadening spectrum and lifetime spectrum of the transition metal elements (Ti, V, Cu) and TiAl-based alloys (Ti50Al50, Ti50Al48V2, Ti50Al48Cu2) The results show that the more 3d electrons in the transition metal elements Ti, V and Cu atoms, the stronger the 3d signal of the broadened spectrum of the positron annihilation radiation Doppler.The lower the electron density and the 3d electron signal of the binary TiAl alloy , The larger the open space of the grain boundary defects.In the TiAl alloy by adding V or Cu, 3d electronic signal in the alloy enhanced, the electron density at the matrix and the grain boundaries are increased.DiPLA48Cu2 alloy Doppler broadening spectrum 3d electronic signal Higher than Ti50Al48V2 alloy.