Growth of single-crystal W whiskers during humid H2/N2 reduction of Ni, Fe-Ni, and Co-Ni doped tungsten oxide

Wang, S.L., He, Y.H., Zou, J, Wang, Y and Huang, H (2009) Growth of single-crystal W whiskers during humid H2/N2 reduction of Ni, Fe-Ni, and Co-Ni doped tungsten oxide. JOURNAL OF ALLOYS AND COMPOUNDS, 482 1-2: 61-66. doi:10.1016/j.jallcom.2009.02.126


Author Wang, S.L.
He, Y.H.
Zou, J
Wang, Y
Huang, H
Title Growth of single-crystal W whiskers during humid H2/N2 reduction of Ni, Fe-Ni, and Co-Ni doped tungsten oxide
Formatted title
Growth of single-crystal W whiskers during humid H2/N2 reduction of Ni, Fe-Ni, and Co-Ni doped tungsten oxide
Journal name JOURNAL OF ALLOYS AND COMPOUNDS   Check publisher's open access policy
ISSN 0925-8388
Publication date 2009-08-12
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.jallcom.2009.02.126
Open Access Status
Volume 482
Issue 1-2
Start page 61
End page 66
Total pages 6
Editor Buschow, K.H.J.
Place of publication Netherlands
Publisher Elsevier BV
Language eng
Subject C1
100706 Nanofabrication, Growth and Self Assembly
861799 Communication Equipment not elsewhere classified
Abstract Numbers of W whiskers were obtained by reducing Ni, Ni-Fe, and Ni-Co doped tungsten oxide in a mixed atmosphere of humid H-2 and N-2. The phases and morphologies of the reduction products were characterized by XRD and SEM. Intensive TEM and EDS analyses showed that the obtained whiskers were W single crystals which typical have alloyed particles (Ni-W, Fe-Ni, or Co-Ni-W) at the growth tips. The formed W whiskers were presumed to be induced by the alloyed particles. Our experimental results revealed that, during the reduction process of tungsten oxide, the pre-reduced Ni, Fe-Ni, or Co-Ni particles not only served as nucleation aids for the initial growth of W phase from W oxide but also played the roles of catalysts during the reductive decomposition of gaseous WO2(OH)(2).
Keyword Tungsten oxide
HYDROGEN-REDUCTION
Whisker
Chemical vapor transport
Catalysis
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID 50825102
CH060063
50711120183
08JJ3110
KF0705
Institutional Status UQ

 
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Created: Thu, 03 Sep 2009, 17:50:46 EST by Mr Andrew Martlew on behalf of School of Mechanical and Mining Engineering