Crystallite size distribution by two-dimensional XRD. Issue 2 (June 2022)

• Record Type: Journal Article
• Authors: He, Bob B.
• Is Part Of: Powder diffraction. Volume 37:Issue 2(2022)
• Page Start: 76
• Page End: 83
• Publication Date: 2022-06
• Subjects: crystallite size distribution -- rocking curve -- two-dimensional XRD; Powder metallurgy -- Periodicals; Materials -- Analysis -- Periodicals; 620.1127
• DOI: 10.1017/S0885715622000045
• Languages: English
• ISSNs: 0885-7156

Abstract

Abstract : The crystallite size distribution is an important parameter affecting the processing and properties of materials or products containing crystallites. The X-ray diffraction pattern collected with a two-dimensional detector may contain one or several spotty diffraction rings when an appropriate X-ray beam size is used. The spottiness of the diffraction ring is related to the size, size distribution, and orientation distribution of the crystallites. The intensity of a diffraction spot may represent its volume or size of a crystallite when a perfect Bragg condition is met. This paper introduces the algorithms and procedure to evaluate crystallite size distribution from a 2D diffraction pattern by rocking scan.