John McCloy | Washington State University (original) (raw)
Papers by John McCloy
International Journal of Applied Glass Science
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Journal of the American Ceramic Society
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Inorganic Chemistry
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Journal of Non-Crystalline Solids
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AIP Advances
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Journal of Non-Crystalline Solids
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Journal of Non-Crystalline Solids
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Journal of Radioanalytical and Nuclear Chemistry
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MRS Advances
A glass-ceramic borosilicate waste form is being considered for immobilization of waste streams o... more A glass-ceramic borosilicate waste form is being considered for immobilization of waste streams of alkali, alkaline-earth, lanthanide, and transition metals generated by transuranic extraction for reprocessing used nuclear fuel. Waste forms are created by partial crystallization on cooling, primarily of oxyapatite and powellite phases. In-situ neutron diffraction experiments were performed to obtain detailed information about crystallization upon cooling from 1200°C. The combination of high temperatures and reactivity of borosilicate glass with typical containers used in neutron experiments, such as vanadium and niobium, prevented their use here. Therefore, methods using sealed thick-walled silica ampoules were developed for the in-situ studies. Unexpectedly, high neutron absorption, low crystal fraction, and high silica container background made quantification difficult for these high temperature measurements. As a follow-up, proof-of-concept measurements were performed on differen...
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Journal of Non-Crystalline Solids
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Journal of the American Ceramic Society
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AIP Advances
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The Journal of Physical Chemistry C
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Journal of the American Ceramic Society
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Journal of Luminescence
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Environmental Science and Technology, Apr 21, 2014
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Proceedings of Spie the International Society For Optical Engineering, May 1, 2009
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Aps Meeting Abstracts, Feb 1, 2012
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International Journal of Applied Glass Science
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Journal of the American Ceramic Society
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Inorganic Chemistry
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Journal of Non-Crystalline Solids
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AIP Advances
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Journal of Non-Crystalline Solids
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Journal of Non-Crystalline Solids
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Journal of Radioanalytical and Nuclear Chemistry
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MRS Advances
A glass-ceramic borosilicate waste form is being considered for immobilization of waste streams o... more A glass-ceramic borosilicate waste form is being considered for immobilization of waste streams of alkali, alkaline-earth, lanthanide, and transition metals generated by transuranic extraction for reprocessing used nuclear fuel. Waste forms are created by partial crystallization on cooling, primarily of oxyapatite and powellite phases. In-situ neutron diffraction experiments were performed to obtain detailed information about crystallization upon cooling from 1200°C. The combination of high temperatures and reactivity of borosilicate glass with typical containers used in neutron experiments, such as vanadium and niobium, prevented their use here. Therefore, methods using sealed thick-walled silica ampoules were developed for the in-situ studies. Unexpectedly, high neutron absorption, low crystal fraction, and high silica container background made quantification difficult for these high temperature measurements. As a follow-up, proof-of-concept measurements were performed on differen...
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Journal of Non-Crystalline Solids
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Journal of the American Ceramic Society
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AIP Advances
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The Journal of Physical Chemistry C
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Journal of the American Ceramic Society
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Journal of Luminescence
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Bookmarks Related papers MentionsView impact
Environmental Science and Technology, Apr 21, 2014
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Bookmarks Related papers MentionsView impact
Proceedings of Spie the International Society For Optical Engineering, May 1, 2009
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Aps Meeting Abstracts, Feb 1, 2012
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This article appeared in a journal published by Elsevier. The attached copy is furnished to the a... more This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: http://www.elsevier.com/authorsrights Abstract There is increased interest in improved methods for in situ non-destructive interrogation of materials for nuclear reactors in order to ensure reactor safety and quantify material degradation (particularly embrittlement) prior to failure. Therefore, a prototypical ferritic/ martensitic alloy, HT-9, of interest to the nuclear materials community was investigated to assess microstructure effects on micromag-netics measurements (Barkhausen noise emission, magnetic hysteresis measurements, and first order reversal curve analysis) for samples undergoing three different heat treatments. Microstructural and physical measurements consisted of high precision density, resonant ultrasound elastic constant, Vickers microhardness, grain size, and texture determination. These were varied in the HT-9 alloy samples and related to various magnetic signatures. In parallel, a mesoscale microstructure model was created for a-iron and the effects of poly-crystallinity and the demagnetization factor were explored. It was observed that Barkhausen noise emission decreased with increasing hardness and decreasing grain size (lath spacing), while coercivity increased. The results are discussed in terms of the use of magnetic signatures for the non-destructive interrogation of radiation damage and other microstructural changes in ferritic/martensitic alloys.
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