Acta Metall Sin  1993, Vol. 29 Issue (8): 85-90    DOI:

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A NEW APPROACH TO PARTICLE SIZE DETERMINATION OF ALLOY UFP

CHEN Jian;WEI Wenduo;SUN Xiukui;YANG Mingchuan;HU Zhuangqi State Key Laboratory of RSA; Institute of Metal Research; Academia Sinica; Shenyangdoctoral candidate;Institute of Metal Research;Academia Sinica;Shenyang 110015

CHEN Jian;WEI Wenduo;SUN Xiukui;YANG Mingchuan;HU Zhuangqi State Key Laboratory of RSA; Institute of Metal Research; Academia Sinica; Shenyangdoctoral candidate;Institute of Metal Research;Academia Sinica;Shenyang 110015. A NEW APPROACH TO PARTICLE SIZE DETERMINATION OF ALLOY UFP. Acta Metall Sin, 1993, 29(8): 85-90.

Abstract References Related Articles Recommended Metrics Download:  PDF(572KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The mechanism of X-ray diffraction peak broadening of Fe_(50)Pd(50) alloyultrafine particles(UFP), produced by inert gas condensation method, has been investigatedby XRD, ED, TEM and EDAX. The results show that the anomalous peak broadening of thealloy UFP is caused by the nonuniformity in chemical composition. The composition broad-ening factor is decided by the diffraction angle θ and the average variation rate of the latticeparamater e_c which is caused by composition nonuniform. It can be expressed by the formulaβ_c(2θ)=4e_ctanθMean particle size is calculated by using Gaussian, Cauchy and mixed profiles. UsingCauchy or mixed profiles can lead to a better agreement with the TEM results. The results ob-tained from various profiles are close to each other when particle size is small. The discrepan-cy becomes large with the increase in particle size. Key words:  alloy ultrafine particles      X ray diffraction      composition broadening      Received:  18 August 1993      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1993/V29/I8/85 1 Klug H P, Alexander L E. X-ray Diffraction Procedures For Polycrystalline and Amorphous Materials. 2nd ed., John Wiley&Sons. 1974: Chap 9 2 Warren B E. X-Ray Diffraction. Reading, Massachusetts: Addison--Wesley, 1969: Chap 13 3 Huang T C, Hart M, Parrish W, Masciocchi N. J Appl Phys, 1987; 61: 2813 4 Kimoto K, Kamiya Y, Nonoyama M, Uyeda R. Jpn J Appl Phys, 1963; 2: 702 5 Hultgren R, Zapffe C A. Trans Am Inst Min Metall Eng, 1939; 133: 58 6 Alexander L E. J Appl Phys. 1948; 19: 1068 7 Jones F W: Proc Roy Soc, London, 1938; 166A: 16 8 Taylor A, Sinclair H. Proc Phys Soc. London, 1945; 57: 10 No related articles found! No Suggested Reading articles found! Viewed Full text Abstract Cited   Shared      Discussed