【摘要】 本文提出了一种精确的定峰方法—示差定峰法,其基本步骤为,在相同实验条件下测定一对试祥同组晶面(hkl)的衍射峰,利用相关函数求出它们之间的布拉格角度差(Δ2θ)。试验证明,该法测得的Δ2θ的精度明显高于常规定峰法(Δ2θ的相对偏差小于±0.01°),由于它具有较高的测量精度,因此可应用于测定点阵常数的微小变化(Δα)和宏观残余应力分析方面。更多还原

【Abstract】 A Precise method determineing diffraction peak,differential me-thod determineing peak,was presented in this paper.In this method the produceis as follow:A pair diffraction peaksof identical plane (h k l) are deter-mined in same experimental condition,then the differences of Bragg angles(Δ2θ) can be calculated by the correction function.It is proved that the preci-sion determined by above method (relative differences of Δ2θ<±0.01).Therefore,this method can be applied on minimal differential determination of thelattice constants (Δa) and analyses of macroscopic residual stresses.更多还原