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Title: Surface analysis of Zircaloy-2 implanted with carbon before and after oxidation in air at 500 deg. C

Abstract

Zircaloy-2 specimens were implanted with carbon ions in the fluence range from 1 x 10{sup 16} to 1 x 10{sup 18} ions/cm{sup 2}, using a MEVVA source at an extraction voltage of 40 kV at a maximum temperature of 380 deg. C. The valences and depth profiles of elements in the implanted surface of Zircaloy-2 were analyzed by X-ray photoelectron spectroscopy and Auger electron spectroscopy, respectively. Scanning electron microscopy was used to examine the micro-morphology of samples. The color of the oxidized samples was checked with an optical scanner. Glancing-angle X-ray diffraction at 0.3{sup o} incident angles was employed to examine the phase transformations of implanted samples before and after oxidation in the air at 500 deg. C for 2 h. Before oxidation, at fluences less than 5 x 10{sup 16} ions/cm{sup 2}, hexagonal zirconia (H-ZrO{sub 0.35}) was present. At a fluence of 1 x 10{sup 17} ions/cm{sup 2}, rhombohedral zirconia (R-Zr{sub 3}O) appeared. When the fluence reached 1 x 10{sup 18} ions/cm{sup 2}, cubic zirconium carbide was produced. There are many pits, both deep and shallow, in the sample surfaces, both prior to oxidation and after oxidation. Oxidation in the air at 500 deg. C gave rise to blackmore » surfaces on all samples. The X-ray diffraction results showed that monoclinic and tetragonal zirconia were present in the surface of as-received sample. For implanted samples, monoclinic and tetragonal zirconia are still present, while cubic zirconium carbide is produced at all fluences. The presence of ZrC is attributed to the high-temperature, long-time (2 h) exposure.« less

Authors:
 [1];  [2];  [2];  [2];  [3]
  1. Department of Materials Science and Engineering, Tsinghua University, Beijing, 100084 (China). E-mail: pdq01@mails.tsinghua.edu.cn
  2. Department of Materials Science and Engineering, Tsinghua University, Beijing, 100084 (China)
  3. Jianzhong Chemical Cooperation, Yibin, 644000 (China)
Publication Date:
OSTI Identifier:
20833190
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Characterization; Journal Volume: 56; Journal Issue: 2; Other Information: DOI: 10.1016/j.matchar.2005.09.016; PII: S1044-5803(05)00236-6; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AUGER ELECTRON SPECTROSCOPY; CARBON; CARBON IONS; MONOCLINIC LATTICES; MORPHOLOGY; OXIDATION; PHASE TRANSFORMATIONS; SCANNING ELECTRON MICROSCOPY; SURFACES; TEMPERATURE RANGE 0400-1000 K; TETRAGONAL LATTICES; X-RAY DIFFRACTION; X-RAY PHOTOELECTRON SPECTROSCOPY; ZIRCALOY 2; ZIRCONIUM OXIDES

Citation Formats

Peng, D.Q., Bai, X.D., Pan, F., Sun, H., and Chen, B.S. Surface analysis of Zircaloy-2 implanted with carbon before and after oxidation in air at 500 deg. C. United States: N. p., 2006. Web. doi:10.1016/j.matchar.2005.09.016.
Peng, D.Q., Bai, X.D., Pan, F., Sun, H., & Chen, B.S. Surface analysis of Zircaloy-2 implanted with carbon before and after oxidation in air at 500 deg. C. United States. doi:10.1016/j.matchar.2005.09.016.
Peng, D.Q., Bai, X.D., Pan, F., Sun, H., and Chen, B.S. Wed . "Surface analysis of Zircaloy-2 implanted with carbon before and after oxidation in air at 500 deg. C". United States. doi:10.1016/j.matchar.2005.09.016.
@article{osti_20833190,
title = {Surface analysis of Zircaloy-2 implanted with carbon before and after oxidation in air at 500 deg. C},
author = {Peng, D.Q. and Bai, X.D. and Pan, F. and Sun, H. and Chen, B.S.},
abstractNote = {Zircaloy-2 specimens were implanted with carbon ions in the fluence range from 1 x 10{sup 16} to 1 x 10{sup 18} ions/cm{sup 2}, using a MEVVA source at an extraction voltage of 40 kV at a maximum temperature of 380 deg. C. The valences and depth profiles of elements in the implanted surface of Zircaloy-2 were analyzed by X-ray photoelectron spectroscopy and Auger electron spectroscopy, respectively. Scanning electron microscopy was used to examine the micro-morphology of samples. The color of the oxidized samples was checked with an optical scanner. Glancing-angle X-ray diffraction at 0.3{sup o} incident angles was employed to examine the phase transformations of implanted samples before and after oxidation in the air at 500 deg. C for 2 h. Before oxidation, at fluences less than 5 x 10{sup 16} ions/cm{sup 2}, hexagonal zirconia (H-ZrO{sub 0.35}) was present. At a fluence of 1 x 10{sup 17} ions/cm{sup 2}, rhombohedral zirconia (R-Zr{sub 3}O) appeared. When the fluence reached 1 x 10{sup 18} ions/cm{sup 2}, cubic zirconium carbide was produced. There are many pits, both deep and shallow, in the sample surfaces, both prior to oxidation and after oxidation. Oxidation in the air at 500 deg. C gave rise to black surfaces on all samples. The X-ray diffraction results showed that monoclinic and tetragonal zirconia were present in the surface of as-received sample. For implanted samples, monoclinic and tetragonal zirconia are still present, while cubic zirconium carbide is produced at all fluences. The presence of ZrC is attributed to the high-temperature, long-time (2 h) exposure.},
doi = {10.1016/j.matchar.2005.09.016},
journal = {Materials Characterization},
number = 2,
volume = 56,
place = {United States},
year = {Wed Mar 15 00:00:00 EST 2006},
month = {Wed Mar 15 00:00:00 EST 2006}
}