Skip to main content Accessibility help
×
Home
Hostname: page-component-559fc8cf4f-sbc4w Total loading time: 0.31 Render date: 2021-02-26T07:26:36.038Z Has data issue: true Feature Flags: { "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true, "metricsAbstractViews": false, "figures": false, "newCiteModal": false, "newCitedByModal": true }

Microstructural Studies of Multiphase (Zr,Ti)(V,Cr,Mn,Co,Ni)2 Alloys for NiMH Negative Electrodes

Published online by Cambridge University Press:  18 January 2011

L. A. Bendersky
Affiliation:
Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
K. Wang
Affiliation:
Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
W. J. Boettinger
Affiliation:
Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
D. E. Newbury
Affiliation:
Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
K. Young
Affiliation:
Energy Conversion Devices Inc., Rochester Hills, MI 48309, USA
B. Chao
Affiliation:
Energy Conversion Devices Inc., Rochester Hills, MI 48309, USA
Get access

Abstract

The solidification microstructures of six Laves-based (Zr,Ti)(TM,Ni)2 alloys (TM= V,Cr, Mn,Co) intended for use as novel negative electrodes in Ni-metal hydride batteries were studied here; these alloys often have their best electrochemical properties when in the cast state. Solidification occurs by dendritic growth of a hexagonal C14 Laves phase followed by peritectic solidification of a cubic C15 Laves phase and formation of a cubic B2 phase in interdendritic regions. The observed sequence of Laves phase C14/C15 upon solidification agrees with predictions using effective compositions and thermodynamic assessments of the ternary systems, Ni-Cr-Zr and Cr-Ti-Zr. The paper also examines the complex internal structure of the interdendritic grains formed by solid-state transformation, which plays an important role in the electrochemical charge/discharge characteristics. By studying one alloy it is shown that the interdendritic grains solidify as a B2 (Ti,Zr)44(Ni,TM)56 phase, and then undergo transformation to Zr7Ni10-type, Zr9Ni11-type and martensitic phases. The transformations obey orientation relationships between the high-temperature B2 phase and the low-temperature Zr-Ni-type intermetallics, and consequently lead to a multivariant structure. Binary Ni-Zr and ternary Ti-Ni-Zr phase diagrams were used to rationalize the formation of the observed domain structure.

Type
Research Article
Copyright
Copyright © Materials Research Society 2011

Access options

Get access to the full version of this content by using one of the access options below.

References

1. Ovshinsky, S.R., Fetcenko, M., and Ross, J., Science 260, 176 (1993).CrossRefGoogle Scholar
2. Saldan, I., Frenzel, J., Shekhah, O., Chelmowski, R., Birkner, A., and Wöll, C., J. Alloys Compd. 470, 568 (2009).CrossRefGoogle Scholar
3. Qiu, S., Chu, H., Zhang, Y., Sun, D., Song, X., Sun, L., and Xu, F., J. Alloys Compd. 471, 453 (2009).CrossRefGoogle Scholar
4. Young, K., Fetcenko, M.A., Li, F., Ouchi, T., Koch, J., J. Alloys Compd. 468, 482 (2009).CrossRefGoogle Scholar
5. Young, K., Ouchi, T., Mays, W., Reichman, B., and Fetcenko, M.A., J. Alloys Compd. 434, 480 (2009).Google Scholar
6. Laves, F.in Theory of Alloy Phases(ASM, Cleveland, OH, 1956) p. 123 Google Scholar
7. Joubert, J.M., Latroche, M., and Percheron-Guegan, A., J. Alloys Compd. 231, 494 (1995).CrossRefGoogle Scholar
8. Young, K., Ouchi, T., Huang, B., Nei, J., and Fetcenko, M.A., J. Alloys Compd. 501, 236 (2010).CrossRefGoogle Scholar
9. Boettinger, W.J., Newbury, D.E., Wang, K., Bendersky, L.A., Chiu, C., Kattner, U.R., Young, K., and Chao, B., Metall. Mater. Trans. A, 41A, 2033 (2010); L.A. Bendersky, K. Wang, W.J. Boettinger, D.E. Newbury, K. Young, and B. Chao, Metall. Mater. Trans. A, 41A, 1891 (2010)CrossRefGoogle Scholar

Full text views

Full text views reflects PDF downloads, PDFs sent to Google Drive, Dropbox and Kindle and HTML full text views.

Total number of HTML views: 0
Total number of PDF views: 7 *
View data table for this chart

* Views captured on Cambridge Core between September 2016 - 26th February 2021. This data will be updated every 24 hours.

Send article to Kindle

To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Microstructural Studies of Multiphase (Zr,Ti)(V,Cr,Mn,Co,Ni)2 Alloys for NiMH Negative Electrodes
Available formats
×

Send article to Dropbox

To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

Microstructural Studies of Multiphase (Zr,Ti)(V,Cr,Mn,Co,Ni)2 Alloys for NiMH Negative Electrodes
Available formats
×

Send article to Google Drive

To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

Microstructural Studies of Multiphase (Zr,Ti)(V,Cr,Mn,Co,Ni)2 Alloys for NiMH Negative Electrodes
Available formats
×
×

Reply to: Submit a response


Your details


Conflicting interests

Do you have any conflicting interests? *