论文部分内容阅读
七十年代前生产的电子探针大都没有配上电子计算机,定量分析计算多采用脱机校正或手算查表的方法。本文给出Cu—Nb—Sn三元合金及Cu—Nb、Cu—Sn二元合金的校正计算标准曲线,使这三种合金样品的定量分析能够快速、准确地从曲线上查出。标准曲线是在设定Cu的浓度C_(Cu)为某一个值时,对Nb和Sn的浓度C_(Nb)和C_(Sn)进行组合,采用ZAF校正后反算出相应的X射线强度比K_(Nb)和K_(Sn)。将K对C作图。以5％的浓度间隔,设定20个Cu的浓度,制作了Cu—Nb-Sn三元合金的K_(Nb)～C_(Nb)和K_(Sn)～C_(Sn)标准曲线各20根。同时制作了Cu—Nb和Cu—Sn二元合金的K—C标准曲线,如图1和2。标准曲线使用条件为:出射角20°、加速电压25KV、测量线系Cu—K_α、Nb—L_α、Sn—L_α。使用步骤:(1)假设K_(Cu)为C′_(Cu),由K_(Nb)、K_(Sn)直接从Cu—Nb—Sn合金的K～C曲线上查出一次校正浓度值C~1_(Nb)和C~1_(Sn)。(2)从Cu—Nb合金的K_(Cu)～C_(Cu)曲线上查出C_(Cu)(Nb)以及从Cu—Sn合金的K_(Cu)～C_(Cu)曲线上查出C_(Cu)(sm),将C~1_(Nb)和C~1_(Sn)归一化为C~0_(Nb)和C~0_(Sn)由下式计算Cu的一次校正浓度值为:
Most of the electronic probes produced before the seventies are not equipped with electronic computers. Quantitative analysis and calculation mostly adopt the methods of offline correction or manual calculation. In this paper, calibration calibration curves of Cu-Nb-Sn ternary alloys and Cu-Nb and Cu-Sn binary alloys are given, which enable the quantitative analysis of these three alloy samples to be quickly and accurately found out from the curves. The standard curve is a combination of C_ (Nb) and C_ (Sn) concentrations of Nb and Sn when the concentration of Cu is set to a certain value. After correction with ZAF, the corresponding X-ray intensity ratio K_ (Nb) and K_ (Sn). K to C plotting. The concentrations of 20 Cu were set at 5% concentration intervals and 20 K-Nb to C-Nb and Cu-Sn standard curves were prepared for the Cu-Nb-Sn ternary alloy . At the same time, the K-C standard curves of Cu-Nb and Cu-Sn binary alloys were made, as shown in Figs. 1 and 2. Standard curve conditions for use are: exit angle 20 °, acceleration voltage 25KV, measuring line Cu-K_α, Nb-L_α, Sn-L_α. (1) Suppose K_ (Cu) is C’_ (Cu), K_ (Nb) and K_ (Sn) are directly detected from the K-C curve of Cu-Nb-Sn alloy, ~ 1_ (Nb) and C ~ 1_ (Sn). (2) C_ (Cu) (Nb) was found from the curve of K_ (Cu) ~ C_ (Cu) in Cu-Nb alloy and C_ (Cu) (Cu) (sm), normalized C ~ 1 Nb and C ~ 1 Sn to C ~ 0 Nb and C ~ 0 Sn The primary corrected concentration of Cu is calculated from the following formula: