材料期刊网

本文证明,从一组全同织构样品的无标X射线定量相分析所导出的计算相含量的公式,与Zevin对无织构状态样品导出的公式完全一致。这一结果表明,如果能够提供一组织构状态相同而相含量有差异的样品,或者能够将一个待测的织构样品,通过任一种手段(例如热处理),使样品的相含量发生变化而不改变它的织构状态,则织构样品的相定量方法和无织构的普通样品的相定量方法完全相同。 本文还对样品中各相的吸收系数很大或相差极为悬殊的微吸收情况进行讨论和估算。 应用这一方法于冷轧Fe-25％Mn合金和压制Mo-Cu粉末试样都得到满意的结果。

Formulae derived for X-ray quantitative phase analysis without any standardin the case of specimens with identical texture have been shown to be in completeagreement with those derived by Zevin for randomly oriented specimens. Thus,when it is practicable by some ways (for example, by certain heat treatments) tochange the composition of the alloy phases without altering the texture of thespecimen, the method of quantitative phase analysis for such a textured specimencan be taken as identical with that for randomly oriented specimens. In cases where the absorption coefficients of the phases in a specimen happento be large, corrections for microabsorption are necessary and such corrections aregiven in the present work. The method mentioned above has been applied to a cold-rolled Fe-25%Mnalloy as well as to certain compacting specimens of Mo-Cu powders with satisfac-tory results.