Akhlaghi Maryam, Steiner Tobias, Meka Sai Ramudu, Mittemeijer Eric Jan
Max Planck Institute for Intelligent Systems (formely MPI for Metals Reseach), Heisenbergstrasse 3, Stuttgart, 70569, Germany.
Max Planck Institute for Intelligent Systems (formely MPI for Metals Reseach), Heisenbergstrasse 3, Stuttgart, 70569, Germany; Robert Bosch GmbH Heat Treatment Processes and Heat Treatment Technology (CR/APM4), Postbox 300240, Stuttgart, 70442, Germany.
J Appl Crystallogr. 2016 Feb 1;49(Pt 1):69-77. doi: 10.1107/S1600576715022608.
Elastic accommodation of precipitation-induced or thermally induced misfit leads to lattice-parameter changes in crystalline multi-phase systems. Formulae for calculation of such misfit-induced lattice-parameter changes are presented for the aggregate (matrix + second-phase particles) and for the individual matrix and second phase, recognizing the occurrence of either coherent or incoherent diffraction by the matrix and second-phase particles. An overview and an (re)interpretation on the above basis is presented of published lattice-parameter data, obtained by X-ray diffraction analyses of aggregates of matrix plus second-phase particles. Examples for three types of systems consisting of a matrix with misfitting second-phase particles are dealt with, which differ in the origin of the misfit (precipitation or thermally induced) and in the type of diffraction (coherent or incoherent diffraction of matrix plus second-phase particles). The experimental data are shown to be in good to very good agreement with predictions according to the current treatment.
由沉淀诱导或热诱导失配引起的弹性调节会导致晶体多相系统中晶格参数的变化。本文给出了计算这种失配诱导晶格参数变化的公式，分别适用于聚集体（基体 + 第二相颗粒）以及单个基体和第二相，并考虑了基体和第二相颗粒发生相干或非相干衍射的情况。基于上述内容，对通过基体加第二相颗粒聚集体的X射线衍射分析获得的已发表晶格参数数据进行了综述和（重新）解读。研究了由具有失配第二相颗粒的基体组成的三种类型系统的示例，这些系统在失配起源（沉淀或热诱导）和衍射类型（基体加第二相颗粒的相干或非相干衍射）方面存在差异。实验数据与根据当前处理方法的预测结果显示出良好到非常好的一致性。
