| 光谱学与光谱分析 |
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| Boundary Threshold Value Method Used in Crystalline Material Internal Defect Detection by Short Wavelength X-Ray Diffraction |
| MU Jian-lei1，ZHANG Jin1*，GAO Zheng-huan1，ZHENG Lin2，HE Chang-guang2 |
1. Beijing Key Laboratory for Corrosion, Erosion and Surface Technology, University of Science and Technology Beijing, Beijing 100083, China
2. Institute of Southwest Technology Engineering, Chongqing 400039, China |
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Abstract There are few references about crystalline material internal defect detected by X-ray diffraction tomography using common X-ray source. Short wavelength X-ray diffractometer (SWXRD), invented by Institute of Southwest Technology Engineering, is a relatively small and inexpensive instrument compared to synchrotron radiation or neutron reactor. Boundary determination of defect affects the imaging quality and the distinguishing of defect in X-ray diffraction tomography using SWXRD. In the present paper, threshold value method of diffracted intensity is put forward to process the test data, so the boundary of defect is legible. In order to study how the factors influence the threshold value, Gauss function is used in fitting the test data. The influence of varisized image quality indicator pressed in powdered aluminum on threshold value has been studied. The result shows that 91% of the diffraction intensity of substrate can be regarded as the threshold value. The experiment of slit in aluminum alloy sheet further verified the threshold value method. It’s useful in detecting the defect boundary.
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Received: 2010-09-07
Accepted: 2010-11-25
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Corresponding Authors:
ZHANG Jin
E-mail: zhangjin@ustb.edu.cn
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[1] ZHU Pei-yu, WU Zi-yu(朱佩玉，吴自玉). Physics(物理), 2007, 36(6): 443.
[2] CHEN Jian-wen, GAO Hong-yi, LI Ru-xin(陈建文，高鸿奕，李儒新). Progress in Physics(物理学进展), 2005, 2(225): 175.
[3] Momose A，Takeda T，Itai Y. Nature Medicine, 1996, 2: 473.
[4] Chapman D，Thomlinson W，Johnston R E. Phys. Med. Biol., 1997, 42: 2015.
[5] David C，Nhammer B，Solak H H. Appl. Phys. Lett., 2002, 81: 3287.
[6] Momose A，Kawamoto S，Koyama I. Jpn. J. Appl. Phys., 2003, 42: L866.
[7] Snigirev A，Snigireva I，Kohn V. Rev. Sci. Instrum., 1995, 66: 5486.
[8] Wilkins S W，Gureyev T E，Gao D. Nature, 1996, 384: 335.
[9] Wang Junyue, Zhu Peiping, Yuan Qingxi. Radiation Physics and Chemistry, 2006, 75: 1986.
[10] Gureyev T E, Nesterets Ya I, Mayo S C. Optics Communications, 2007, 280: 39.
[11] Dhal B B, Peele A G, McMahon P J. Radiation Physics and Chemistry, 2006,75: 2004.
[12] Jan Jakubek, Carlos Granja, Jiri Dammer. Nuclear Instruments and Methods in Physics Research A, 2007, 571: 69.
[13] King A, Herbig M, Ludwig W. Nuclear Instruments and Methods in Physics Research B, 2010, 268: 291.
[14] Pani S, Cook E J, Horrocks J A. Applied Radiation and Isotopes, DOI: 10.1016/j.Apradi-so., 2010, 04: 027.
[15] Ludwing W, Reischig P, King A. Reiview of Scientific Instruments, 2009, 80: 033905.
[16] Harding G, Kosanetzky J, Neitzel U. Phys. Med., 1987, 14: 515.
[17] Harding G, Newton M, Kosanetzky J. Phys. Med. Biol., 1990, 35: 33.
[18] Grant J A, Davis J R, Morgan M J, et al. Proceedings of SPIE-the International Society for Optical Engineering, 1994, 2092: 429.
[19] Barroso R C, Lopes R T, Goncalves O D, et al. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1998, 418(2-3) :458.
[20] Barroso R C, Lopes R T, Goncalves O D, et al. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1999, 422(1-3): 718.
[21] Hall C. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1998, 140(1-2): 253.
[22] Gurker N, Nell R, Backfrieder W. Nuclear Instruments and Methods in Physics Research B, 1994, 94: 154.
[23] Garrity D J, Jenneson P M, Crook R. Applied Radiation and Isotopes, 2010, 68: 693.
[24] Zheng Lin, He Changguang, Peng Zhengkun. U. S. Patent, 7 583 788 B2, 2009.
[25] Zheng Lin, He Changguang, Peng Zhengkun. China Patent, Z200410068880 2, 2005.
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