Effect of processing variables on the reaction kinetics of MgB2 fibers

John D. Defouw; David C. Dunand

doi:10.1016/j.physc.2010.06.007

Effect of processing variables on the reaction kinetics of MgB₂ fibers

John D. Defouw, David C. Dunand

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

The reaction kinetics for converting B fibers into MgB₂ fibers are measured by in situ synchrotron X-ray diffraction and ex situ by metallography as a function of the following processing variables: fiber diameter, fiber doping, fiber surface treatment, Mg flux (liquid or gaseous Mg), and thermal cycling. Changes to the fiber diameter, surface treatment and Mg flux affect little the rates of the reaction, while C-doping of fibers dramatically decreases reaction rate and thermal cycling increases the reaction rate.

Original language	English (US)
Pages (from-to)	648-653
Number of pages	6
Journal	Physica C: Superconductivity and its applications
Volume	470
Issue number	15-16
DOIs	https://doi.org/10.1016/j.physc.2010.06.007
State	Published - Aug 1 2010

Keywords

Magnesium diboride
Reaction kinetics
Thermal cycling
X-ray diffraction

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/j.physc.2010.06.007

Cite this

@article{3124c6fb399e462b876a0dcfbf65b0c4,

title = "Effect of processing variables on the reaction kinetics of MgB2 fibers",

abstract = "The reaction kinetics for converting B fibers into MgB2 fibers are measured by in situ synchrotron X-ray diffraction and ex situ by metallography as a function of the following processing variables: fiber diameter, fiber doping, fiber surface treatment, Mg flux (liquid or gaseous Mg), and thermal cycling. Changes to the fiber diameter, surface treatment and Mg flux affect little the rates of the reaction, while C-doping of fibers dramatically decreases reaction rate and thermal cycling increases the reaction rate.",

keywords = "Magnesium diboride, Reaction kinetics, Thermal cycling, X-ray diffraction",

author = "Defouw, {John D.} and Dunand, {David C.}",

note = "Funding Information: This work was supported by the US National Science Foundation through Grant No. DMR-0319051 . The authors thank Dr. J. Marzik of Specialty Materials, Inc. for providing C-doped and un-doped B fibers and Drs. J. Quintana, Q. Ma and D. Keane for help in performing the diffraction experiments at the DuPont-Northwestern-Dow Collaborative Access Team (DND-CAT). DND-CAT is supported by E.I. DuPont de Nemours & Co., The Dow Chemical Company and the State of Illinois and is located at Sector 5 of the Advanced Photon Source which is supported by the US Department of Energy under Contract No. DE-AC02-06CH11357.",

year = "2010",

month = aug,

day = "1",

doi = "10.1016/j.physc.2010.06.007",

language = "English (US)",

volume = "470",

pages = "648--653",

journal = "Physica C: Superconductivity and its Applications",

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TY - JOUR

T1 - Effect of processing variables on the reaction kinetics of MgB2 fibers

AU - Defouw, John D.

AU - Dunand, David C.

N1 - Funding Information: This work was supported by the US National Science Foundation through Grant No. DMR-0319051 . The authors thank Dr. J. Marzik of Specialty Materials, Inc. for providing C-doped and un-doped B fibers and Drs. J. Quintana, Q. Ma and D. Keane for help in performing the diffraction experiments at the DuPont-Northwestern-Dow Collaborative Access Team (DND-CAT). DND-CAT is supported by E.I. DuPont de Nemours & Co., The Dow Chemical Company and the State of Illinois and is located at Sector 5 of the Advanced Photon Source which is supported by the US Department of Energy under Contract No. DE-AC02-06CH11357.

PY - 2010/8/1

Y1 - 2010/8/1

N2 - The reaction kinetics for converting B fibers into MgB2 fibers are measured by in situ synchrotron X-ray diffraction and ex situ by metallography as a function of the following processing variables: fiber diameter, fiber doping, fiber surface treatment, Mg flux (liquid or gaseous Mg), and thermal cycling. Changes to the fiber diameter, surface treatment and Mg flux affect little the rates of the reaction, while C-doping of fibers dramatically decreases reaction rate and thermal cycling increases the reaction rate.

AB - The reaction kinetics for converting B fibers into MgB2 fibers are measured by in situ synchrotron X-ray diffraction and ex situ by metallography as a function of the following processing variables: fiber diameter, fiber doping, fiber surface treatment, Mg flux (liquid or gaseous Mg), and thermal cycling. Changes to the fiber diameter, surface treatment and Mg flux affect little the rates of the reaction, while C-doping of fibers dramatically decreases reaction rate and thermal cycling increases the reaction rate.

KW - Magnesium diboride

KW - Reaction kinetics

KW - Thermal cycling

KW - X-ray diffraction

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JO - Physica C: Superconductivity and its Applications

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